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EN
The purpose of the present study was to determine the water needs of bird cherry (Padus avium Mill.) over three years after planting on the reclaimed areas. The estimations were performed for the period of two months, including July and August, which are critical in terms of the amount of water available to the plants. The water requirements of bird cherry plants were calculated in the years 1981-2010 for five agro-climatic regions of Poland with the representative meteorological stations located in Olsztyn, Bydgoszcz, Warsaw, Wrocław and Krakow. The bird cherry water needs were determined using the plant coefficient method. The plant coefficients for bird cherry trees over three years after planting were adapted to the reference evapotranspiration that was calculated using the Blaney-Criddle’s formula, modified for Polish conditions by Żakowicz. The rainfall deficit with the probability of occurrence of average dry years (N50%), medium dry years (N25%) and very dry years (N10%) was determined according to the Ostromęcki’s method. On average, in the years 1981-2010, in July and August, the highest water needs of bird cherry trees, grown on the reclaimed areas over three years, were estimated in the central-north-west (271 mm) and central-east (270 mm) region of Poland. While, the lowest water requirements of bird cherry (240 mm) in the south-east region of the country was calculated. In August, the highest bird cherry water needs (121 mm) were estimated also in the central-north-west and central-east region of Poland, whereas the lowest water requirements (111 mm) occurred in the south-east region of the country. In each considered region of Poland, in the years 1981-2010, a visible increase in bird cherry water needs in the period of the highest water requirements, was noted. With the exception of the central-north-west region of the country, the temporal variability of bird cherry water needs was significant throughout Poland. The highest increase of the water requirements (by 6.7 mm per every ten-year period) in the south-east region of Poland was found. In the period covering July and August, the highest rainfall deficit, 131 and 133 mm, in the average dry years (N50%) was noted in the central-east and central-north-west region of Poland, respectively. In the north-east, central-north-west and central-east region of the country, the rainfall deficit in the medium dry years (N25% ranging from 206 to 214 mm) and very dry years (N10% ranging from 269 to 300 mm) was higher than in the south-west and south-east region of Poland (N25% ranging from 146 to 159 mm and N10% ranging from 195 to 211 mm).
PL
Celem przedstawionych badań było oszacowanie zapotrzebowania na wodę czeremchy zwyczajnej (Padus avium Mill.) w okresie powyżej trzech lat po wykonaniu nasadzeń na obszarach objętych rekultywacją. Obliczenia przeprowadzono dla okresu obejmującego dwa miesiące, lipiec i sierpień, które są krytyczne pod względem ilości wody dostępnej dla roślin. Wymagania wodne roślin czeremchy zwyczajnej zostały oszacowane w latach 1981-2010 dla pięciu agro-klimatycznych regionów Polski wraz z reprezentatywnymi stacjami meteorologicznymi zlokalizowanymi w Olsztynie, Bydgoszczy, Warszawie, Wrocławiu i Krakowie. Potrzeby wodne drzew czeremchy zwyczajnej zostały określone za pomocą metody współczynników roślinnych. Współczynniki roślinne dla drzew czeremchy zwyczajnej w okresie powyżej trzech lat po wykonaniu nasadzeń na obszarach objętych rekultywacją dostosowano do ewapotranspiracji wskaźnikowej, którą obliczono za pomocą wzoru Blaneya-Criddle'a, zmodyfikowanego dla warunków polskich przez Żakowicza. Niedobory opadów atmosferycznych z prawdopodobieństwem wystąpienia roku przeciętnie suchego (N50%), roku średnio suchego (N25%) oraz roku bardzo suchego (N10%) oznaczono za pomocą metody Ostromęckiego. Średnio, w latach 1981-2010, w okresie od 1 lipca do 31 sierpnia, najwyższe zapotrzebowanie na wodę drzew czeremchy zwyczajnej w okresie powyżej trzech lat po wysadzeniu na obszarach zrekultywowanych obliczono w centralno-północno-zachodnim (271 mm) oraz centralno-wschodnim regionie Polski (270 mm). Z kolei najniższe zapotrzebowanie na wodę czeremchy zwyczajnej (240 mm) wystąpiło w południowo-wschodnim regionie kraju. W sierpniu najwyższe zapotrzebowanie na wodę drzew czeremchy zwyczajnej (121 mm) obliczono również w centralno-północno-zachodnim oraz centralno-wschodnim regionie Polski, natomiast najniższe zapotrzebowanie na wodę (111 mm) wystąpiło w południowo-wschodnim regionie kraju. We wszystkich rozpatrywanych regionach Polski, w okresie od 1981 do 2010, odnotowano tendencję do zwiększania się potrzeb wodnych czeremchy zwyczajnej w czasie największego zapotrzebowania na wodę, czyli w lipcu i w sierpniu. Z wyjątkiem centralno-północno-zachodnim regionu Polski, trend zmienności czasowej potrzeb wodnych czeremchy zwyczajnej był istotny we wszystkich pozostałych regionach kraju. Najwyższy wzrost zapotrzebowania na wodę (o 6,7 mm w każdym kolejnym dziesięcioleciu) wystąpił w południowo-wschodnim regionie Polski. W okresie od 1 lipca do 31 sierpnia największe niedobory opadów atmosferycznych, 131 i 133 mm, w przeciętnie suchym roku (N50%) odnotowano odpowiednio w środkowo-wschodnim oraz środkowo północno-zachodnim regionie Polski. W północno-wschodnim, środkowo-północno-zachodnim i środkowo-wschodnim regionie kraju niedobory opadów atmosferycznych w średnio suchym roku (N25% w zakresie od 206 do 214 mm) i w bardzo suchym roku (N10% w przedziale od 269 do 300 mm) był wyższy niż w południowo-zachodnim i południowo-wschodnim regionie Polski (N25% od 146 do 159 mm i N10% od 195 do 211 mm).
EN
Asparagus (Asparagus officinalis L.), due to their deep and well-developed root system, are relatively resistant to the water deficits in the soil. On the other hand, asparagus plants grown on the light soil positively respond to the irrigation treatments. The aim of the present study was the determination of water needs of asparagus plants in the different agro-climatic regions of Poland. The calculations of asparagus water requirements, considered as the crop evapotranspiration, based on the precipitation measurements collected during the thirty-year period from 1981 to 2010. The estimations were achieved for the months, including July and August, critical in terms of the amount of water available to the plants. The calculation of asparagus water needs using the plant coefficients was performed. The plant coefficients for asparagus cultivated in the Polish field conditions were determined by Rolbiecki. Published by him calculations based on the long-term observations of the irrigated asparagus crop. The reference evapotranspiration was calculated according to Grabarczyk's method. The Grabarczyk's formula was chosen because it allowed estimating the reference evapotranspiration in a simplified way, i.e. based only on the precipitation measurements. The rainfall deficit was considered using the Ostromęcki's method. The precipitation deficit in the period from July 1 to August 31 was calculated as the difference between the water needs of asparagus, expressed as the crop evapotranspiration for a considered month and the total precipitation in this month. The water needs of asparagus plants were determined for five agro-climatic regions of Poland with the representative meteorological stations located in Olsztyn, Bydgoszcz, Warszawa, Wroclaw and Krakow. The highest variability of asparagus water requirements was calculated in the central-north-west (C-N-W) region of the Poland. The variation coefficient in July and August was 7.7% and 7.6%, respectively. In contrast, the lowest variability of asparagus water needs were find in the south-west (S-W) and south-east (S-E) region of Poland. The highest water needs of asparagus plants, on average 228 mm, in the period from July to August were noted in the C-N-W and central-east (C-E) region of Poland. The highest rainfall deficit, calculated for medium dry years, average dry years and very dry years, was 91 mm and 89 mm, 157 mm and 166 mm, and 209 mm and 245 mm, respectively, in the C-N-W and C-E region, re-spectively. Generally, higher precipitation deficiencies were noted in August than in July.
PL
Szparagi (Asparagus officinalis L.), ze względu na swój głęboki oraz dobrze rozwinięty system korzeniowy, są roślinami uważanymi za stosunkowo odporne na niedobory wody w glebie. Z drugiej strony, rośliny szparagów uprawiane na glebie lekkiej bardzo pozytywnie reagują na przeprowadzone zabiegi nawadniające. Podstawowym celem niniejszej pracy było określenie potrzeb wodnych roślin szparagów w różnych regionach agro-klimatycznych Polski. Obliczenie zapotrzebowania roślin tego gatunku warzywnego na wodę, wyrażonego jako ewapotranspiracja potencjalna, wykonano na podstawie pomiarów opadów atmosferycznych przeprowadzonych w okresie trzydziestu lat licząc od 1981 do 2010 roku. Obliczenia wykonano dla dwóch miesięcy, dla lipca oraz dla sierpnia. Miesiące te stanowią okres krytyczny pod względem ilości wody dostępnej dla roślin. Potrzeby wodne roślin szparaga oszacowano przy użyciu współczynników roślinnych. Współczynniki roślinne dla roślin szparaga uprawianych w Polsce w warunkach polowych zostały ustalone przez Rolbieckiego w oparciu o długoterminowe obserwacje nawadnianych nasadzeń szparaga. Ewapotranspirację wskaźnikową obliczono zgodnie z metodą zaproponowaną przez Grabarczyka. Metoda Grabarczyka została wybrana do niniejszych badań, ponieważ pozwoliła ona na określenie ewapotranspiracji wskaźnikowej w uproszczony sposób, to znaczy tylko na podstawie pomiarów opadów atmosferycznych. Niedobory opadów zostały obliczone przy użyciu metody Ostromęckiego. Deficyt opadów w okresie od 1 lipca do 31 sierpnia obliczono, jako różnicę między potrzebami wodnymi roślin szparagów, wyrażonymi jako ewapotranspiracja potencjalna dla danego miesiąca, a sumą opadów atmosferycznych w tym miesiącu. Potrzeby wodne roślin szparaga określono dla pięciu różnych regionów agro-klimatycznych Polski wraz z reprezentatywnymi stacjami meteorologicznymi zlokalizowanymi na terenie Olsztyna, Bydgoszczy, Warszawy, Wrocławia i Krakowa. Największą zmienność potrzeb wodnych roślin szparaga obliczono w środkowo-północno-zachodnim (C-N-W) regionie Polski. Współczynnik zmienności w lipcu oraz w sierpniu wyniósł odpowiednio 7,7% i 7,6%. Natomiast najmniejszą zmienność potrzeb wodnych roślin szparaga stwierdzono w południowo-zachodnim (S-W), a także południowo-wschodnim (S-E) regionie Polski. Największe potrzeby wodne roślin szparagów, średnio 228 mm, w okresie od 1 lipca do 31 sierpnia, odnotowano w C-N-W, a także środkowo-wschodnim (C-E) regionie Polski. Największy deficyt opadów atmosferycznych, obliczony dla przeciętnie suchych lat, średnio suchych lat oraz bardzo suchych lat, wynosił odpowiednio 91 mm i 89 mm, 157 mm i 166 mm oraz 209 mm i 245 mm, odpowiednio w C-N-W i C-E regionie Polski. Podsumowując, większe niedobory opadów atmosferycznych odnotowano w sierpniu niż w lipcu.
EN
The ash-leaved maple (Acer negundo L.) has low habitat requirements, which is why this species is often used in the reclamation of industrial areas. The development of the reclamation plantings depends on the optimal water soil conditions that can be controlled by watering treatments. However, the use of irrigation requires determining the water needs of the cultivated species. The objective of the study was to evaluate the water needs of the ash-leaved maple in the reclamation plantings, in the period of over three years after planting. The water needs of the ash-leaved maple were determined using the crop coefficients method. Potential evapotranspiration was calculated using the Blaney-Criddle’s formula that was modified for the Polish conditions by Żakowicz. The water needs of the ash-leaved maple were assessed for five agro-climatic regions of Poland, in the years 1981-2010. The water needs of the ash-leaved maple in the growing period (April-October) were the highest in the C-E (638 mm) and C-N-W (637 mm) regions, and the lowest in the N-E (598 mm) and S-E (601 mm) regions. In July, the highest water needs were noted in the C-N-W region (149 mm) and the lowest in the S-W region (129 mm). In the studied thirty-years period, there was a significant upward trend in the water needs of the ash-leaved maple both during the growing season (except for the C-N-W region) and in July, in all the considered regions.
EN
The aim of this study was to estimate the water needs of grapevines (Vitis vinifera L.) in the different regions of Poland. The requirements of grapevines water, considered as the crop evapotranspiration, were determined using the plant coefficient method. The grapevine plants crop evapotranspiration was measured using the reference evapotranspiration and plant coefficients. The plant coefficients were adapted to the reference evapotranspiration that was calculated using the Blaney‑Criddle’s formula, modified for Polish conditions by Żakowicz. The water needs of grapevines were determined for five agro‑climatic regions of Poland with the representative meteorological stations. The calculations of grapevines water requirements were carried out for the thirty‑year period determined from 1981 to 2010. The study was based on the six‑month growing season established from May 1 to October 31. Four months, including May, June, July and August, were considered as the irrigation period. The highest grapevines water requirements (440 mm) during the growing season, were observed in the north‑west and central‑east region of Poland. In turn, the lowest water requirements were revealed in the south‑east (414 mm) and north‑east (415 mm) region of the country. During the irrigation period, the highest grapevines water needs occurred in the central‑north‑west (355 mm) and central‑east (353 mm) region of Poland, while the lowest (329 mm) – in the south‑east region of the country. The upward time trend of the grapevines water requirements was observed both in the growing season and in the irrigation period. With the exception of the central‑north‑west region, this time trend was significant throughout Poland. The highest increase in the water needs of grapevines during the growing season (by 6.9 mm in each subsequent ten‑year period) occurred in the central‑east and south‑east region of Poland. In the irrigation period, the highest rise of grapevines water requirements was noted in the south‑west (7.4 mm decade ‑1) and south‑east (7.6 mm decade ‑1) region of the country. The highest rainfall deficit was observed in the central‑north‑west region of Poland; 125 mm during the growing season, and 117 mm in the irrigation period.
EN
The objective of this work is to determine the effects of climate change on the water needs of crops in the Bounamoussa perimeter, which is one of the large irrigation systems in the North-East of Algeria in order to predict a diagnosis of its operation. This region covers an area of 16,500 ha and is specialized in vegetable production. The climatic trend of recent years in the study area is characterized by increasingly severe drought conditions that have compromised agricultural production at this perimeter. In this study, the results of the climatic parameters projected to 2050 and 2080 under the Climate Wizard program were used in the CropWat 8.0 program for estimating the future water requirements of crops, taking into account the three Scenarios (B1, A1B, A2) of greenhouse gases (GHGs). The Decision Support System for Agrotechnology Transfer (DSSAT) 4.5 program has also been used to generate future climatic parameters (temperatures and rains) to be compared with those of the climate wizard. The results obtained in 2050 and 2080 show a trend towards increasing temperatures and a fall in rainfall for all models and that the water requirements will be multiplied by 3 to 5 times the current needs. This situation will cause an imbalance in the operation of perimeter irrigation systems. Among the measures of adaptation to this situation in the first place is the change of the date of planting after calibration of the two models for all the cultures of the perimeter.
PL
Przedmiotem prezentowanych w niniejszej pracy badań było określenie skutków zmian klimatu na potrzeby wodne upraw w obrębie systemu nawodnieniowego rzeki Bounamoussa, który jest jednym z największych w północnowschodniej Algierii. Miało to na celu sporządzenie diagnozy jego działania w przyszłości. Region zajmuje powierzchnię 16 500 ha i specjalizuje się w produkcji roślinnej. Zmiany klimatu na badanym obszarze cechuje silna susza o zwiększającym się w ostatnich latach natężeniu, zagrażająca produkcji rolniczej. W badaniach zastosowano parametry klimatyczne prognozowane do roku 2050 i 2080 w ramach programu Climate Wizard do modelu CropWat 8.0 szacującego przyszłe zapotrzebowanie upraw na wodę z uwzględnieniem trzech scenariuszy (B1, A1B i A2) emisji gazów cieplarnianych. Wykorzystano także model wspierania decyzji w transferze agrotechnologii (DSSAT 4.5) do generowania parametrów przyszłego klimatu (temperatury i opady) w celu porównania ich z danymi uzyskanymi z Climate Wizard. Na podstawie wyników uzyskanych ze wszystkich modeli dla lat 2050 i 2080 stwierdzono trendy rosnące temperatury i malejące opadów. Zgodnie z tymi wynikami zapotrzebowanie na wodę ma wzrosnąć 3–5 razy w stosunku do aktualnych potrzeb. Taka sytuacja doprowadzi do zaburzenia równowagi w systemie irygacyjnym. Wśród sposobów przystosowania się do takiej sytuacji jednym z ważniejszych jest zmiana daty siewu, co można osiągnąć po skalibrowaniu obu modeli w dostosowaniu do wszystkich rodzajów upraw w regionie.
EN
The results of the study devoted to assessment of accuracy and reliability of the CROPWAT 8.0 software application calculations of the evapotranspiration and crop water requirements are represented in the article. The study was based on the results of the perennial field experiments, conducted during the period from 2012 to 2017 at the irrigated lands of the South of Ukraine with different crops, namely: sweet corn, grain corn, soybean, sorghum. We assessed accuracy of the CROPWAT 8.0 software application by the comparison of the calculated values with the real ones. We determined considerable differences between the calculated crops evapotranspiration values and crops irrigation requirements and the real ones obtained in the field experiments. The difference was the most essential in case of the dripirrigated sweet corn crop and averaged to 46.05% for evapotranspiration and 89.20% for irrigation water requirements, correspondingly. Overhead sprinkler irrigated crops are likely to be more suitable for accurate evapotranspiration prediction by using the CROPWAT 8.0. The slightest discrepancy between the calculated and actual values of the studied parameters were determined on the overhead sprinkler irrigated grain corn crops, where the differences averaged just to 15.86% for evapotranspiration and 41.63% for irrigation norm. The results of the study gave us an opportunity to conclude that CROPWAT 8.0 software application should not be used without previous calibration and adjustment of the crop coefficients for the concrete agricultural production conditions.
PL
W artykule przedstawiono wyniki badań poświęconych ocenie dokładności i wiarygodności obliczeń ewapotranspiracji i zapotrzebowania roślin na wodę z zastosowaniem programu CROPWAT 8.0. Podstawą badań były wyniki wieloletniego eksperymentu polowego prowadzonego od 2012 do 2017 r. na nawadnianych polach południowej Ukrainy z różnymi uprawami: kukurydzy cukrowej, kukurydzy zwykłej, soi i sorgo. Oceniono dokładność wyników uzyskanych za pomocą CROPWAT 8.0 przez porównanie wartości obliczonych z wartościami rzeczywistymi. Stwierdzono znaczne różnice między obliczonymi wartościami ewapotranspiracji upraw i ich zapotrzebowaniem na wodę a wartościami rzeczywistymi z eksperymentów polowych. Największe różnice stwierdzono w przypadku kroplowo nawadnianych upraw kukurydzy cukrowej i wynosiły one 46,05% w odniesieniu do ewapotranspiracji i 89,20% do zapotrzebowania na wodę do nawodnień. Obliczenia ewapotranspiracji za pomocą CROPWAT 8.0 były bardziej dokładne w odniesieniu do upraw nawadnianych deszczowniami. Najmniejszą rozbieżność między obliczonymi a rzeczywistymi wartościami badanych parametrów stwierdzono w przypadku deszczowanych upraw kukurydzy zwykłej, gdzie różnice wynosiły 15,86% w odniesieniu do ewapotranspiracji i 41,63% do norm nawadniania. Wyniki badań dają podstawy do wnioskowania, że CROPWAT 8.0 nie powinien być stosowany bez wstępnej kalibracji i dostosowania współczynników upraw do konkretnych warunków produkcji rolniczej.
PL
Celem pracy było porównanie potrzeb wodnych wiśni w rejonie Bydgoszczy i Wrocławia w czterdziestoleciu 1976-2015. Potrzeby wodne plantacji wiśni - dla gleb średnich, lekkich i ciężkich - wyznaczono metodą Pressa dla średnich miesięcznych temperatur powietrza w okresie IV-VIII w każdym roku. Większe potrzeby wodne wiśni w okresie IV-VIII stwierdzono w rejonie Wrocławia niż w rejonie Bydgoszczy. W rejonie Bydgoszczy, średnio w badanym czterdziestoleciu 1976-2015, wynosiły one 253 mm na glebach ciężkich, 316 na glebach średnich i 379 mm na glebach lekkich. W rejonie Wrocławia natomiast kształtowały się one na poziomie odpowiednio: 261 mm, 326 mm i 391 mm. Największe potrzeby wodne wiśni - wśród analizowanych pięciu miesięcy - wystąpiły w lipcu. W rejonie Bydgoszczy, średnio w badanym czterdziestoleciu 1976-2015, wynosiły one: 65 mm na glebach ciężkich, 82 na glebach średnich i 98 mm na glebach lekkich. W rejonie Wrocławia natomiast były one wyższe i kształtowały się na poziomie odpowiednio: 67 mm, 84 mm i 101 mm. Stwierdzono statystycznie istotny trend zmienności czasowej potrzeb wodnych wiśni w okresie wegetacji (IV-VIII) w obu badanych rejonach, przy czym silniejsze zależności wystąpiły dla rejonu Wrocławia. Z przeprowadzonych analiz wynika, że w latach 1976-2015 potrzeby wodne wiśni w każdej dekadzie (dziesięciu latach) wzrastały o 3.9 mm na glebach ciężkich, 4.9 mm na glebach średnich i 5.9 mm na glebach lekkich w rejonie Bydgoszczy oraz o 8.6 mm na glebach ciężkich, 10.7 mm na glebach średnich i 12.8 mm na glebach lekkich - w rejonie Wrocławia. Spośród analizowanych miesięcy, najsilniej potrzeby wodne wiśni wzrastały w lipcu. W rejonie Bydgoszczy trend ten w każdej dekadzie wynosił dla gleb: ciężkich 2.5 mm, średnich 3.2 mm oraz lekkich 3.8 mm. W rejonie Wrocławia - odpowiednio dla rozpatrywanych kategorii ciężkości gleb - przedstawiał się on na poziomie: 3.1 mm, 3.9 mm i 4.6 mm. Średnie w badanym czterdziestoleciu deficyty opadów – które można utożsamiać z potrzebami nawadniania wiśni - zależały od kategorii ciężkości gleb i były najwyższe na glebach lekkich. W okresie IV-VIII wynosiły one 115 mm (maksymalnie 160 mm) w rejonie Bydgoszczy oraz 72 mm (maksymalnie 113 mm) w rejonie Wrocławia.
EN
The aim of the paper was the comparison of sour cherry-tree water requirements in the regions of Bydgoszcz and Wrocław in 1976-2015. The sour cherry-tree water requirements were determined for each year on the basis of air temperature in the period April - August for light soils, medium soils and heavy soils. The sour cherry-tree water requirements in the period April - August in the region of Wrocław were higher than those in the Bydgoszcz region. The sour cherry-tree water requirements in the Bydgoszcz region amounted 253 mm on the heavy soils, 316 mm on the medium soils and 379 mm on the light soils. The sour cherry-tree water requirements in the Wrocław region amounted 261 mm, 326 mm and 391 mm, respectively. From among five months, July was characterized by the highest water requirements. The water requirements in July in the Bydgoszcz region amounted 65 mm on the heavy soils, 82 mm on the medium soils and 98 mm on the light soils. The water requirements in July in the Wrocław region were higher and amounted 67 mm, 84 mm and 101 mm, respectively. In the vegetation period (IV-VIII), the significant tendency to increase the water requirements of sour cherry-tree in both observed regions was noted; stronger relationships occurred for the Wrocław region. The analyzes show that the water requirements of sour cherry-tree in IV-VIII rose in each decade (ten years) by 3.9 mm on the heavy soils, 4.9 mm on the medium soils and 5.9 mm on the light soils in the Bydgoszcz region and by 8.6 mm, 10.7 mm and 12.8 mm, respectively, in the Wrocław region. From among months, the strongest increase of water requirements occurred in July. The water requirements of sour cherry-tree in July rose in each decade (ten years) by 2.5 mm on the heavy soils, 3.2 mm on the medium soils and 3.8 mm on the light soils in the Bydgoszcz region and by 3.1 mm, 3.9 mm and 4.6 mm, respectively, in the Wrocław region. The average rainfall deficiencies in the studied forty years (which can be treated as irrigation requirements) were dependent on the soil heaviness. They were the highest on the light soils. In the vegetation period (IV-VIII) they amounted 115 mm (maximum: 160 mm) in the Bydgoszcz region and 72 mm (maximum: 113 mm) in the Wrocław region.
PL
Polska jest największym producentem jabłek w Europie. Opady atmosferyczne są podstawowym źródłem wody dla roślin. Klimat Polski charakteryzuje przestrzenna i czasowa zmienność, co utrudnia szacowanie potrzeb nawodnieniowych roślin oraz prognozowanie bilansu wodnego. Celem podjętych badań była ocena potrzeb wodnych jabłoni oraz wysokości opadów efektywnych co pozwoli na określenie potrzeb nawadniania. Dane pomiarowe obejmowały okresy wegetacyjne od V do IX za lata 2011-2016. Analizując dane średnie dla lat i lokalizacji badań stwierdzono, że w naszych warunkach klimatyczny bilans wodny (KBW) tylko w czerwcu dokładnie odzwierciedla bilans potrzeb wodnych jabłoni. W maju wartości KBW są wyraźnie zawyżone w odniesieniu do bilansu potrzeb wodnych jabłoni (BPW-jabłoni), a w VII, VIII i IX zaniżone.
EN
Poland is the biggest producer of apple in Europe. Rainfalls are basic source of water for plants. The climate of Poland is characterized by high temporal and spatial variation that makes estimation of plant water requirements and forecasting of water balance difficult. The aim of the study was assessment of water needs of apple trees as well as amount of effective precipitation, enabling estimation of irrigation requirements. Data was collected during vegetative periods (May - Sep.) of 2011-2016. Analysis of data from different years and locations revealed that in Polish conditions climatic water balance accurately reflects balance of water requirements of apple trees only in June. In May values of climatic water balance were significantly higher, whereas in July, August and September lower compared to balance of apple water requirements.
EN
The aim of the study was to compare the water requirements and the precipitation deficiencies during cultivation of asparagus in the period from June to August in the regions of Bydgoszcz and Wroclaw. The water needs were calculated using the plant coefficient. The reference evapotranspiration was measured by Grabarczyk’s method (1976). The coefficients kc, determined for the Polish conditions by Rolbiecki (2013), were used to estimate the water requirements considered as the crop evapotranspiration. In the studied period (from June to August, 1996-2015), higher water requirements of asparagus were noted in the Wroclaw region (366.1 mm) than in the Bydgoszcz region (288.5 mm). The monthly water needs in June, July and August were 69.8 mm, 128.8 mm and 167.5 mm, respectively, in the Wroclaw region, and 55.5 mm, 98.5 mm and 134.5 mm, respectively, in the Bydgoszcz region. In July, the tendency to increase the water requirements in both observed regions was noted. The monthly crop evapotranspiration in July rose in each decade by 12.3 mm in the Bydgoszcz region and by 21.2 mm in the Wroclaw region. In the 20-year study, the rainfall deficit in June and July during 11-13 years was noted. In August, the precipitation deficiencies were observed during 16 years in the Bydgoszcz region and during 19 years in the Wroclaw region. A higher rainfall deficit during the 20-year period under study was reported in the Wroclaw region (128.5 mm) than in the Bydgoszcz region (87.0 mm). In August, the highest monthly precipitation deficiencies of 100.3 mm (Wroclaw region) and 70.3 mm (Bydgoszcz region) were noted.
EN
The aim of the present research was an attempt to compare apple tree water requirements in the vegetation period in the Bydgoszcz region (Poland) and in the Isparta region (Turkey). The paper refers to the 1984-2014 temperature and precipitation values in the Bydgoszcz and Isparta regions. To determine the reference evapotranspiration (ET0), the calculation model by Hargreaves modified by Droogers and Allen was applied. Potential evapotranspiration, identified with apple tree water requirements, was determined using the method of plant coefficients proposed by Doorenbos and Pruitt. In each of the seven months considered (April-October) higher apple tree water requirements occurred in the Isparta region. The highest apple tree water requirements were noted in July and for that month during the thirty-year period they were 167.3 mm and 286 mm, on average, in the Bydgoszcz and Isparta regions, respectively. Daily water requirements of apple trees in July were more than 9.2 mm in the Isparta region and 5.4 mm in the Bydgoszcz region. Apple tree water requirements throughout the vegetation period (April-October) were much higher (by 120 %) in the Isparta region than in the Bydgoszcz region. The highest precipitation deficits occurred in July and amounted to 95.5 mm and 269.1 mm for the Bydgoszcz and Isparta regions, respectively. The differences in the irrigation requirements for apple tree, next to water requirements differences, were affected by a different precipitation distribution in time in the regions com pared. In the Isparta region higher precipitation occurred at the beginning (April, May) and at the end (October) of the vegetation period, while in the Bydgoszcz region - just opposite - in summer months (June, July, August).
EN
The aim of the present research was to compare the water requirements of grapevine in the regions of Bydgoszcz and Wrocław in the forty-year period between 1976 and 2015. In the research the authors used the mean monthly temperature values (°C) and monthly precipitation (mm) for the May-September period in the years 1976-2015. The meteorological data for the Bydgoszcz region was derived from standard meteorological measurements performed at the Experiment Station at Mochełek, and analysed at the Department of Land Reclamation and Agrometeorology of the UTP University of Science and Technology in Bydgoszcz. The meteorological data for the Wrocław region were provided by the Swojec experiment station of the Wrocław University of Environmental and Life Sciences. The grapevine water requirements were determined as optimal precipitation assumed by Kemmer and Schulz. It has been found that the grapevine water requirements in 1976-2015, expressed as the optimal annual precipitation according to Kemmer and Schulz, were higher in the Wrocław region than in the Bydgoszcz region and they amounted to 469.3 mm and 435.8 mm, respectively. The grapevine water requirements in both regions in the forty-year period under study showed a growing tendency. A larger increase in grapevine water requirements (27.5-28.0 mm per decade) occurred in the Wrocław region. The estimates show that during the forty-year period (1976-2015) the precipitation deficits in grapevine growing in the May-September period occurred in 11 years in the Bydgoszcz region and in 9 years in the Wrocław region.
EN
The aim of the present research has been an attempt at estimating the water requirements of sweet cherry tree in 2016-2050 in the Bydgoszcz region drawing on the forecast temperature changes. The paper draws on the forecasting of mean monthly temperature for the Bydgoszcz region in 2011-2050 according to the climate change scenario for Poland SRES: A1B (Bąk, Łabędzki 2014). The water requirements of the sweet cherry tree have been determined based on the indispensable precipitation determined by Kemmer and Schulz. The water requirements were calculated for the period January through December and May through September for each year in the 35-year period (2016-2050). The reference period was made up by a 35-year period immediately preceding it (1981-2015). In 2016-2050 in the Bydgoszcz region, in the light of the forecast temperature change scenarios, one can expect an increase in the water requirements of the sweet cherry tree. Determined with the Kemmer and Schulz method, the required annual (January-December) optimal total precipitation will increase for the sweet cherry tree from 532 mm to 746 mm (by 214 mm, which accounts for 40%). The optimal precipitation trend equations show that in the reference period (1981-2015), calculated with the Kemmer and Schulz number, the optimal annual precipitation was increasing in the sweet cherry tree in each pentad by 2.4-3.0 mm. In the forecast period (2016-2050) the water requirements will increase, however, in each pentad within a much greater range, from 13.0 to 14.5 mm. In the summer period (May through September) determined by Kemmer and Schulz, the total precipitation optimal for the sweet cherry tree, expressing the water requirements, in 2016-2050 will increase by 107 mm.
EN
The aim of the present research has been an attempt at evaluating the water requirements of plum trees over 2016-2050 in the Bydgoszcz region drawing on the forecast changes in temperature. The paper draws on the forecasting of mean monthly temperature for the Bydgoszcz region in 2011-2050 according to the climate change scenario for Poland SRES: A1B (Bąk, Łabędzki 2014). The water requirements of the plum tree have been determined based on the indispensable precipitation determined by Kemmer and Schulz. The water requirements were calculated for the period January through December and May through September for each year in the 35-year period (2016-2050). The reference period was made up by a 35-year period immediately preceding it (1981-2015). In 2016-2050 in the Bydgoszcz region, in the light of the forecast temperature change scenarios, one should expect an increase in the water requirements of the plum tree. The annual (January-December) optimal total precipitation determined according to the Kemmer and Schulz method will increase for the plum tree from 712 mm to 807 mm (by 95 mm, which accounts for 13%). The optimal precipitation trend equations show that in the reference period (1981-2015), calculated, drawing on the Kemmer and Schulz number, the optimal annual precipitation was increasing in the plum tree in each pentad by 7.1-7.5 mm. In the forecast period (2016-2050) the water requirements will increase, however, in each pentad within a much smaller range, from 2.6 to 3.0 mm. In the summer period (May-September) determined by Kemmer and Schulz, the total precipitation optimal for the plum tree, expressing water requirements, in 2016-2050 will increase by 47 mm.
EN
The aim of the present research has been an attempt at evaluating the water requirements of pear trees over 2016-2050 in the Bydgoszcz region drawing on the forecast changes in temperature. The paper draws on the forecasting of mean monthly temperature for the Bydgoszcz region in 2011-2050 according to the climate change scenario for Poland SRES: A1B (Bąk, Łabędzki 2014). The water requirements of the pear tree have been determined based on the indispensable precipitation determined by Kemmer and Schulz. The water requirements were calculated for the period January through December and May through September for each year in the 35-year period (2016-2050). The reference period was made up by a 35-year period immediately preceding it (1981-2015). In the period 2016-2050 in the Bydgoszcz region, in the light of the temperature change scenarios made, one should expect an increase in the water requirements of the pear tree. Determined with the Kemmer and Schulz method, the required optimal annual (January-December) precipitation will increase for the pear tree from 624 mm to 771 mm (by 147 mm, namely by 24 %). The optimal precipitation trend equations show that in the reference period (1981-2015), calculated with the Kemmer and Schulz numbers, the optimal annual precipitation was increasing in the pear tree in each pentad by 5.1-5.5 mm. In the forecast period (2016-2050) the water requirements will increase, on the other hand, in each pentad within a much greater range (7.5-8.4 mm). In, determined by Kemmer and Schulz, summer period (May-September), the total precipitation, expressing water requirements, optimal for the pear tree in 2016-2050 will increase by 73 mm.
EN
The aim of the present research has been an attempt at evaluating the water requirements of peach trees over 2016-2050 in the Bydgoszcz region drawing on the forecast changes in temperature. The paper draws on the forecasting of mean monthly temperature for the Bydgoszcz region in 2011-2050 according to the climate change scenario for Poland SRES: A1B (Bąk, Łabędzki 2014). The water requirements of the peach tree have been determined based on the indispensable precipitation determined by Kemmer and Schulz. The water requirements were calculated for the period January through December and May through September for each year in the 35-year period (2016-2050). The reference period was made up by a 35-year period immediately preceding it (1981-2015). In 2016-2050 in the Bydgoszcz region, in the light of the forecast scenarios of changes in temperature, one should expect an increase in water requirements of the peach tree. Determined according to the Kemmer and Schulz method, the required optimal annual (January-December) precipitation will increase for peach from 486 mm to 612 mm (by 126 mm, which accounts for 26%). The optimal precipitation time variation trend equations show that in the reference period (1981-2015), calculated based on the Kemmer and Schulz number, the optimal annual precipitation was increasing in the peach tree in each pentad by 4.4-4.8 mm. In the forecast period (2016-2050) the water requirements of the peach tree will be increasing in each pentad in a greater range - from 6.4 to 7.2 mm. In the summer period (May-September) determined by Kemmer and Schulz, expressing water requirements, the total precipitation optimal for the peach tree in 2016-2050 will increase by 63 mm.
EN
The present research has aimed at estimating the water requirements of grapevine in 2016-2050 in the Bydgoszcz region based on the anticipated temperature changes. . The paper draws on the forecasting of mean monthly temperature for the Bydgoszcz region in 2011-2050 according to the climate change scenario for Poland SRES: A1B (Bąk, Łabędzki 2014). The water requirements of the grapevine have been determined based on the indispensable precipitation determined by Kemmer and Schulz. The water requirements were calculated for the period January through December and May through September for each year in the 35-year period (2016- 2050). The reference period was made up by a 35-year period immediately preceding it (1981-2015). In the 2016-2050 period in the Bydgoszcz region, in the light of the anticipated temperature change scenarios, one can expect increased grapevine water requirements. Determined with the Kemmer and Schulz method, the required optimal annual (January-December) precipitation will increase for the grapevine from 440 mm to 576 mm (by 136 mm, namely by 31 %). The optimal precipitation trend equations demonstrate that in the reference period (1981-2015), calculated with the Kemmer and Schulz, the optimal annual precipitation was increasing in grapevine in each pentad by 2.2-2.6 mm. In the forecast period (2016-2050) the water requirements will increase, however, in each pentad in a much greater range (8.0-8.9 mm). In the summer period (May-September) determined by Kemmer and Schulz, the total precipitation optimal for the grapevine, expressing the water requirements, in 2016-2050 will increase by 68 mm.
EN
The aim of the present research has been an attempt at evaluating the water requirements of apple trees over 2016-2050 in the Bydgoszcz region drawing on the forecast changes in temperature. The paper draws on the forecasting of mean monthly temperature for the Bydgoszcz region in 2011-2050 according to the climate change scenario for Poland SRES: A1B (Bąk, Łabędzki 2014). The water requirements of the apple tree have been determined based on the indispensable precipitation determined by Kemmer and Schulz. The water requirements were calculated for the period January through December and May through September for each year in the 35-year period (2016-2050). The reference period was made up by a 35-year period immediately preceding it (1981-2015). In the 2016-2050 period in the Bydgoszcz region, in the light of the temperature change scenarios, one could expect increased apple-tree water requirements. Determined with the Kemmer and Schulz method, the required annual (January-December) optimal precipitation will increase for the apple tree from 681 mm to 849 mm (by 168 mm, namely by 25 %). The optimal precipitation trend equations show that in the reference period (1981-2015), calculated with the Kemmer and Schulz numbers, the optimal annual precipitation for the apple tree was increasing in each pentad by 5.8-6.3 mm. In the forecast period (2016-2050) the water requirements will increase, however, in each pentad in a much greater range; from 8.5 to 9.6 mm. In the summer period (May-September) determined by Kemmer and Schulz, the optimal precipitation, expressing the water requirements, for the apple tree in 2016-2050 will increase by 84 mm.
EN
The water requirements of the pasture sward using the Penman-Monteith method (FAO-56), which is seldom applied in Poland, was assessed. The reference crop evapotranspiration ETo from a hypothetical grass crop with an assumed crop height of 0.12 m, a fixed surface resistance of 70 s·m-1 and an albedo of 0.23, was used. These assumptions are similar under conditions of ruminant grazing. ETo was computed by using meteorological data from 43 weather stations. The crop evapotranspiration ETc is the product of ETo, and single crop coefficient Kc. The differences between precipitation and ETo and ETc (climatic water balances) were determined for mountain pastures. The results were summarised form of a table and maps of isohyets and isolines elaborated by applying the Geographic Information System techniques (Arc View 9) with the data interpolated by the geostatic method (Kriging).
PL
Celem pracy było określenie ewapotranspiracji wskaźnikowej, potrzeb wodnych oraz klimatycznego bilansu wodnych pastwisk górskich w polskich Karpatach z zastosowaniem metody Penmana-Monteitha FAO-56 (ALLEN et al., 1998) . Osiągnięcie założonego celu zostało dokonane przez: a) oszacowanie wartości ewapotranspiracji wskaźnikowej ETo oraz opracowanie rozkładu przestrzennego ewapotranspiracji wskaźnikowego ETo i elementów klimatycznego bilansu wodnego (P - ETo); b) charakteryzowanie ewapotranspiracji wskaźnikowej oraz klimatycznego bilansu pastwisk górskich w Polskich Karpatach. Poddano analizie dane meteorologiczne z 43 posterunków obserwacyjnych, pochodzących ze zbiorów Instytutu Meteorologii i Gospodarki Wodnej, a także ze Stacji Badawczej ITP w Jaworkach. Dane pochodziły z lat 1990-2005 i reprezentują zmienne warunki klimatyczne w polskich Karpatach. Wyniki badań przedstawiono w postaci map rozkładu przestrzennego, które wykonano metodą GIS ArcView. Przedstawiono następujące elementy: izolinie średnich: sum półroczy letnich (V-X), opadów atmosferycznych P, ewapotranspiracji wskaźnikowej ETo, oraz klimatycznego bilansu wodnego (P - ETo). W okresie półrocza letniego najmniejszymi wartościami ewapotranspiracji wskaźnikowej odznaczają się północne stoki Tatr (Zakopane - 433 mm). Region Beskidu Zachodniego charakteryzuje się mniejszymi średnimi sumami ewapotranspiracji wskaźnikowej, wynoszącymi w okresie letnim od około 440 mm w Beskidzie Śląskim do 460 mm w Beskidzie Sądeckim. W Bieszczadach ETo w omawianym okresie letnim mieści się w zakresie od 460 do 480 mm. Półrocze letnie charakteryzuje się dużym zróżnicowaniem przestrzennym średnich sum klimatycznego bilansu wodnego (P - ETo). Najwyższe nadmiary opadów (P - ETo) występują w partiach szczytowych Beskidu Żywieckiego (400 mm) oraz Tatr Polskich - ponad 700 mm. Linia równowagi opadów atmosferycznych i ewapotranspiracji wskaźnikowej (P = ETo) przebiega wzdłuż granicy między Karpatami a Kotlinami Podkarpackimi. W Beskidzie Wyspowym notowane są nadmiary opadów od 100 do 250 m. Kotliny śródgórskie charakteryzują się również znacznymi nadwyżkami opadów: Kotlina Żywiecka - 300 mm, Orawsko-Nowotarska - poniżej 200 mm, Sądecka - 150-200 mm i Doły Jasielsko-Sanockie - 0-100 mm. W Bieszczadach wskaźnik (P-ETo) wynosi od 150 do 300 mm.
19
Content available remote Rola czynnika wodnego w kształtowaniu jakości plonów pszenicy jarej
PL
Pracę przygotowano na podstawie wyników wieloletniego (1987-2000), ścisłego eksperymentu polowego z deszczowaniem pszenicy jarej, przeprowadzonego na glebie piaszczystej w Kruszynie Krajeńskim koło Bydgoszczy. Stosując analizę korelacji i regresji, uzależniono wskaźniki jakości plonu ziarna od czynnika wodnego, charakteryzowanego przez sumę opadów naturalnych i z deszczowania, stopień pokrycia potrzeb wodnych wyznaczonych pośrednio według formuły Grabarczyka oraz wskaźnik standaryzowanego opadu SPI. Obliczenia przeprowadzono, biorąc pod uwagę cały okres wegetacji pszenicy jarej oraz okres jej wzmożonego zapotrzebowania na wodę. Stwierdzono istotne zależności między badanymi zmiennymi, które przedstawiono za pomocą funkcji liniowych i wielomianowych. Na tej podstawie wyciągnięto wniosek, że zastosowane w badaniach wskaźniki charakteryzujące zmienność czasową czynnika wodnego mogą znaleźć zastosowanie w tworzeniu modeli prognozujących jakość plonu pszenicy jarej.
EN
The paper is based on results of a long-term field experiment (1987–2000) on sprinkler irrigation of spring wheat carried out on a sandy soil at Kruszyn Krajeński near Bydgoszcz. Using correlation and regression analysis, the quality indicators of wheat yield were related to water factor expressed by the sum of rainfall and irrigation, by the coverage of water Leeds estimated according to the Grabarczyk’s formula and by the Standardized Precipitation Index. Calculations were made for the whole vegetation period of spring wheat and for the period of enhanced water needs of this species. Significant relationships among tested variables were found. These relationships are presented with linear and polynomial function. It is concluded that the indices representing temporal variability of the water factor can be useful in models to predict the quality of spring wheat yield.
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