Wyniki wyszukiwania - Biblioteka Nauki

1

Population variability of Beckmannia eruciformis [Poaceae] in Central Eastern Poland

100%

Ciosek M. T. , Krechowski J. , Piorek K. , Borkowska L. , Blazik A.

Electronic Journal of Polish Agricultural Universities. Series Biology

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2008

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tom 11

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nr 2

2

Effect of selected preparations on some biometric features of 'Tardiva’ panicled hydrangea (Hydrangea paniculata Siebold) depending on the irrigation frequency

100%

Durlak W. , Marcinek B. , Szmagara M. , Dudkiewicz M. , Konopinska-Mamej A.

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nr 2

EN

One of the ways to reduce the water consumption by plants while maintaining their proper quality is to use substances that limit excessive transpiration. Three preparations at following concentrations: Moisturin (10%), Root-Zone (4.5%) and Vapor Gard (1%), were used in the experiment. Moisturin and Vapor Gard were applied in the form of a single spray, and Root-Zone as a single irrigation in mid July.The aim of the research was to assess the effect of several anti-transpirants on some biometric features of the ‘Tardiva’ panicled hydrangea depending on the frequency of irrigation. The following parameters were measured: area, perimeter, width and length of leaf blade, length and width of inflorescences, and the diameter of shoots. Treatment of H. paniculata cv. ‘Tardiva’ with Root-Zone and Moisturin anti-transpirants with a single irrigation every other day allows to reduce the water consumption and obtain shrubs of a quality comparable with plants irrigated twice a day. The use of Moisturin with a twice daily irrigation positively affected the length and width of inflorescences.

3

Meristic and biometric features of lake minnow Eupallasella percnurus (Pallas, 1814) in small peat excavation (Jelino, Polesie Lubelskie region)

100%

Kolejko M. , Sender J. , Demetraki-Paleolog A.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2014

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tom 11

4

A comparison of selected morphometric characteristics of the juveniles of Siberian sturgeon [Acipenser baeri Brandt] and its hybrid with Russian sturgeon [Acipenser gueldenstaedti Brandt]

100%

Szczepkowski M. , Kolman R. , Szczepkowska B.

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2002

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tom 10

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nr 1

EN

Sturgeon frywere obtained through the artificial spawning of Siberian sturgeon (Acipenser baeri Brandt) and the hybrid of Siberian and Russian sturgeon (Acipenser baeri Brandt x Acipenser gueldenstaedti Brandt). Selected biotechnological factors of the fish were compared and biometric measurements were taken during a 60-day long rearing period in a recirculation system. A higher growth rate was confirmed in the hybrid sturgeon. The average body weight of the hybrid at an age of nine months was 1,078 g, while that of the Siberian sturgeon was 872 g. The hybrid also utilized feed more efficiently. The food conversion rate during the study period was 0.64 for the hybrid and 0.66 for the Siberian sturgeon. The greatest differences in the plastic features of the studied fish were found for those related to the head. The Siberian sturgeon had a longer rostrum (R) and a shorter post-orbital space (op) than did the hybrid. Significant differences were also observed in the numbers of lateral bony plates (Sl), the number of rays in the dorsal fins (D) and the number of rays in the anal fins (A).

PL

W wyniku sztucznego tarła uzyskano narybek jesiotra syberyjskiego (Acipenser baeri Brandt) i hybryda jesiotra syberyjskiego z jesiotrem rosyjskim (Acipenser baeri Brandt x Acipenser gueldenstaedti Brandt). Podczaswychowu w obiegu recyrkulacyjnym porównano wybrane wskaźniki biotechnologiczne badanych ryb oraz wykonano pomiary biometryczne (tab. 1). Stwierdzono wyższe tempo wzrostu u hybryda (rys. 1). W wieku 9 miesięcy masa średnia hybryda wyniosła 1078 g, a jesiotra syberyjskiego 872 g. Wykorzystanie paszy było również lepsze u hybryda. W badanym okresie współczynnik pokarmowy wyniósł 0,64 u hybryda i 0,66 u jesiotra syberyjskiego. Wraz z wiekiem ryb wartość współczynnika kondycji Fultona pozostawała względnie stała u jesiotra syberyjskiego i wzrastała u hybryda (rys. 2). Wartości cech merystycznych dla hybryda są następujące: liczba grzbietowych płytek kostnych Sd 11,9 ±1,6, liczba bocznych płytek kostnych Sl 37,9 ± 2,8, liczba brzusznych płytek kostnych Sv 8,3 ± 0,9, liczba promieni w płetwie grzbietowej D 41,6 ± 2,1, liczba promieni w płetwie odbytowej A 26,4 ± 1,8 (tab. 1). Znaleziono istotne różnice między hybrydem a jesiotrem syberyjskim w liczbie płytek bocznych Sl, liczbie promieni w płetwie grzbietowej (D) i liczbie promieni w płetwie odbytowej (A). Indeksy hybrydyzacji dla cech merystycznych pokazują zbieżność liczby płytek grzbietowych (Sd) i brzusznych (Sv) z gatunkiem ojcowskim, pośrednie miejsce między gatunkami wyjściowymi dla cech Sl i A oraz zbieżność liczby promieni w płetwie grzbietowej (D) z gatunkiem matczynym (rys. 3). Wśród cech plastycznych największe różnice między badanymi rybami znaleziono dla cech charakteryzujących głowę (rys. 4). Jesiotr syberyjski posiada dłuższe rostrum (R) i krótszą przestrzeń zaoczną (op) niż hybryd. Wartości współczynnika różnicy powyżej 1,28 znaleziono również dla wysokości płetwy grzbietowej (hD) i długości podstawy płetwy odbytowej (lA) (rys. 5).

5

Effect of copper concentration on micropropagation and accumulation of some metals in the Dendrobium kingianum Bidwill orchid

80%

Prazak R. , Molas J.

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tom 20

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nr 3

EN

The study focused on the influence of an increased copper content in the Murashige and Skoog (1962) solid medium on the in vitro plant growth and development of Dendrobium kingianum Bidwill. Sterile explants of pseudobulbs were used for micropropagation of orchid plants on the MS regeneration medium supplemented with 0.5 mg dm-3 NAA and 1.0 mg dm-3 kinetin. Copper (as CuSO4 × 5H2O) was added to all the combinations in concentrations of 0.025 (control), 0.625, 1.25, 2.5 and 5.0 mg dm-3. The results showed that the treatments with 1.25 and 2.5 mg dm-3 stimulated the orchid growth and development in in vitro culture. After eight months of growing in in vitro culture, the highest number of shoots, the longest roots and the heaviest fresh weight of plantlets were obtained in these treatments. In medium with the highest copper concentration (5.0 mg dm-3), a negative influence of the metal on the length of roots and fresh weight of orchids was noted. Spectrophotometric analysis (ASA) showed that the copper and iron accumulation increased in both shoots and roots with the increase in the external Cu level, whereas the zinc and calcium accumulation in these organs decreased. The copper and zinc accumulation in the roots was about 1.5-2.5 times higher than in the shoots, but the iron accumulation was about 3-3.5 times higher. The calcium accumulation in roots was only 5-12% higher than in shoots.

6

Evaluation of biometric features and quality of seedlings from an open nursery in Dobieszyn Forest District

80%

Aniszewska M. , Brzozko J. , Kowalska E.

Annals of Warsaw University of Life Sciences - SGGW. Agriculture

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2017

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nr 70

7

Zroznicowanie morfologiczne konikow polskich - analizy wielowymiarowe

80%

Komosa M. , Frackowiak H.

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nr 4

45-58

8

Effect of the rotation system of forest tree seedlings on their biometric features

80%

Lukaszewicz J.

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tom 44

9

The impact of sewage sludge and biomass ash fertilization on the yield, including biometric features and physiological parameters of plants of two jerusalem artichoke (Helianthus tuberosus L.) cultivars

61%

Puchalski C. , Zapalowska A. , Hury G.

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2017

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tom 41

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nr 1(332)

10

Wpływ deficytu wodnego na wskaźniki wymiany gazowej, produkcyjność i zdrowotność ziarna odmian pszenicy ozimej

61%

Olszewski J. , Pszczolkowska A. , Kulik T. , Fordonski G. , Plodzien K. , Okorski A. , Wasielewska J.

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2007

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tom 06

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nr 4

PL

W latach 2004-2005 mierzono intensywność fotosyntezy, transpiracji, międzykomórkowe stężenie CO₂ oraz przewodność szparkową dwóch odmian pszenicy ozimej. Ponadto określono zasiedlenie grzybami ich ziarniaków. Wykazano, że deficyt wody spowodował obniżenie wskaźników wymiany gazowej, cech biometrycznych i masy ziarna. Stwierdzono niższe zasiedlenie ziarna obu odmian pszenicy przez patogeny grzybowe na obiektach z niedoborem wody w pierwszym roku badań. W kolejnym roku zależności nie były jednoznaczne.

EN

The rate of photosynthesis and transpiration, intercellular CO₂ concentration, and stomatal conductance of two cultivars of winter wheat were determined in the study. The severity of fungal infection of the grain was also estimated. It was found that water deficit decreased the values of gas exchange parameters, biometric characters and grain weight. In the first year the number of fungal isolates in wheat grain of both cultivars was lower under water stress conditions. However, in the next year the findings were ambiguous.

11

Wlasciwosci agrofizyczne amarantusa [Amaranthus cruentus L.]

41%

Szot B.

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tom 18

1-73

EN

Biometrical features of plants and physical properties of amaranth seeds (Amaranihus cruentus) of a population variety originating from South America and a new Polish variety Rawa have been studied. New research methods were worked out or old methods were adapted to suit specific features of this plant. Studies were carried out in the period 1995-96 (population variety) and in 1997 (variety Rawa). Alongside field experiments plot experiments with varying sowing density were conducted in order to evaluate the influence of the number of plants per 1 mL plant on the variability of biometrical features and yields. Plant and wisp height, stalk thickness, wisp mass, number of plants per 1 mL and biological yield as well as seed self-shedding were determined. Geometrical properties (thickness, width, and length) were determined for individual seeds together with their aerodynamic features, surface roughness, resistance to static loading and microstructure. Whereas seed mass was characterised by such parameters as: density, porosity, outer and inner friction, angle of repose and chute, rehological properties and qualitative features. It has been found out that Rawa variety was more uniform than population variety and gave yields that were 50% higher. Seed sowing density differentiated plant biometrical features. Seed self-shedding in different weather conditions ranged from 0,3 to 2.1% of the biological yield. Physical properties of seeds changed according to moisture levels which was described by the regression lines and curves. It was found that with moisture decrease seed thickness, and the mean values ranged from 0,58 to 0,93 mm. Seeds of Rawa variety were developed better. The weight of 1000 seeds was from 0,60 g (very dry seeds) to 0,95 g (very moist seeds). Density was increasing with the decrease in moisture from 653,3 to 842,0 kg/m3. Whereas, porosity of the seed mass decreased from 53,5 to 40,0 %. Both the angle of repose and chute were decreasing with the decrease in the coefficient of inner and outer friction while the roughness of the seed surface was increasing. Amaranth seeds appeared to be more resistant to mechanical loading. The force ranging from 10.7N (very moist seeds) to 70,6N (dry seeds) was sufficient to damage the structure of an individual seed. Aerodynamic seed features depended on such parameters as seed load bearing surface, width, length and weight. With the increase in these parameters critical velocity increased linearly, and the coefficient of volatility decreased according to the same formula.A generalised Maxwell model with three branches was used to describe the phenomena of stress relaxation in the seed mass. It led to the conclusion that amaranth seeds en mass show strong viscoelastic properties. Seed qualitative features show high nutritive value, and evaluation of their microstructure showed that they contain unique starch with kernels thet are very uniform in size (1-1,5(m). Learning about biometrical plant features and their physical properties allowed for working out agrophysical basic for the harvest technology of this plant.