Wyniki wyszukiwania - BazTech

1

Content and Uptake of Selected Microelements with Potato Tuber Yield Treated with Biostimulators

Mystkowska Iwona, Rogóż-Matyszczak Anna

Journal of Ecological Engineering

|

2019

|

Vol. 20, nr 8

65--70

EN

A field experiment was conducted in Międzyrzec Podlaski, (51°59’ N and 22°47’ E), Poland in the period from 2015 to 2017. The experiment was a two-way random split-plot arrangement of plots with three replicates. The following factors were examined: three varieties of potato – Honorata, Jelly, Tajfun, and four variants of application of biostimulants (Kelpak SL, Titanit, GreenOk, BrunatneBio Złoto). The control object comprised potato plants sprayed with distilled water. Biostimulators were applied to potato plants three times (beginning of flowering, full flowering and after flowering of the plants). The aim of the study was to determine the effect of biostimulants on the content and uptake of zinc and copper with the yield of potato tubers. High amount of rainfall in 2017 contributed to an increase in the content of zinc and copper in potato tubers. The tubers of potatoes treated with BrunatneBio Złoto had the highest contenting uptake of Zn and Cu compared to the control plants. The content of microelements in the tubers was significantly dependent on the genotype. The highest concentrations of Zn and Cu were found in the Honorata tubers, and the largest uptake was observed in the Jelly variety.

2

Evaluation of the long-term fertilizer experiment: how organic manures, mineral fertilizers and potato varieties affected tuber yields

Hlisnikovský L., Kunzová E.

Infrastruktura i Ekologia Terenów Wiejskich

|

2017

|

nr III/1

1031--1041

EN

We evaluated how organic manures (farmyard manure, dung water and poultry slurry), different doses of mineral fertilizers (three treatments), combinations of manures with mineral fertilizers (three treatments), and potato varieties (four varieties) influenced potato tuber yields in our longterm fertilizer experiment in Prague, established in 1954. According to our crop rotation, potatoes were planted every ninth year, starting in 1962. Four potato varieties were used since then (Krasava, Radka, Korela, Dita), all of them were medium-maturing and consumable. The average potato yield was 19.1 Mg ha-1 at the beginning of our experiment (1962, var. Krasava) and 37.5 Mg ha-1 in 2007 (var. Dita), showing low suitability of the experimental site for potato production. The mean tuber yield of varieties Krasava, Radka, Korela and Dita was 18.5, 17.1, 30.2 and 37.5 Mg ha-1, respectively. The effect of organic manures was principally comparable with mineral fertilizers. Increasing doses of mineral fertilizers were not related to appropriate increase in tuber yield. Therefore, application of N, P and K around 50, 50 and 144 kg ha-1, respectively, gives fair yields in such non-optimal production area, as is our experimental site. In the case of warm and dry seasons, even high doses of the mineral fertilizers can’t ensure usual potato production.

3

Influence of Foliar Nitrogen and Magnesium Fertilization on Concentration of Ash Micronutrients in Potato Tubers

Ciećko Z., Mierzejewska A., Żołnowski A., Szostek R.

Ecological Chemistry and Engineering. A

|

2012

|

Vol. 19, nr 7

677-688

EN

The paper contains a discussion of the results of an experiment concerning the effect of foliar nitrogen and magnesium fertilization on the concentration of ash macronutrients in edible potato tubers of a medium-early cultivar called Zebra. The trials were based on a three-year, two-factorial field experiment, carried out in 2005–2007 at the Research Station in Tomaszkowo, owned by the University of Warmia and Mazury in Olsztyn. The applied fertilization consisted of 80 kgN, 35 kgP and 100 kgK ha–1. The first experimental factor comprised foliar nitrogen fertilization in the range of doses 8–40 kgN ha–1 accompanied by simultaneously diminished doses of soil nitrogen fertilization. The second factor included three series: without magnesium, with magnesium introduced to soil in a rate of 24 kg ha–1 and with magnesium sprayed over potato leaves in a rate of 12 kgMg ha–1. Tuber samples were analyzed for the concentrations of phosphorus, potassium, magnesium and sodium. The content of these macronutrients tended to decrease under the influence of the increasing nitrogen fertilization, with the exception of phosphorus, whose concentration rose in the series unfertilized with magnesium under the effect of 8 and 16 kgN, and the concentration of sodium, which continued to increase in the Mg fertilized series up to the rate of 24 kg of N applied as a foliar fertilizer. The mean Ca : P = 0.28, Ca : Mg = 0.39 and K : Ca = 11.9 ratios suggest very poor calcium supply of the potato cultivar. In contrast, very broad ratios between K : (Ca + Mg) = 3.32 and K : Mg = 4.60 prove that the concentrations of potassium and magnesium were relatively high. The foliar application of nitrogen, tested in this experiment, had a significant effect on the ratios between ash elements in tubers. It has been demonstrated that as the top-dressing rate of nitrogen increased, the Ca : P and Ca : Mg ratios narrowed while the ratios of K : (Ca + Mg) and K : Ca were broader. The applied fertilization had no effect on the K : Mg ratio.

PL

W pracy przedstawiono wyniki badań dotyczące oddziaływania dolistnego nawożenia azotem i magnezem na zawartość makroskładników popielnych w bulwach ziemniaka jadalnego średnio wczesnej odmiany Zebra. Za podstawę badań przyjęto 3-letnie, II-czynnikowe doświadczenie polowe, które realizowano w latach 2005-2007 na polu Ośrodka Dydaktyczno-Doświadczalnego w Tomaszowie, należącego do Uniwersytetu Warmińsko-Mazurskiego w Olsztynie. Zastosowane nawożenie wynosiło 80 kgN, 35 kgP ha-1 i 100 kgK ha-1. Czynnik I doświadczenia obejmował nawożenie dolistne azotem w zakresie (8; 40) kgN ha-1 zmniejszając jednocześnie doglebową dawkę azotu. Czynnik drugi uwzględniał trzy serie: bez magnezu, z magnezem stosowanym doglebowo 24 kgMg ha-1 oraz z magnezem stosowanym dolistnie w dawce 12 kgMg ha-1. Próby bulw analizowano na zawartość fosforu, potasu, wapnia, magnezu i sodu. Zawartość makroskładników w bulwach pod wpływem wzrastającego dolistnego nawożenia azotem generalnie ulegała obniżeniu. Wyjątek stanowiła zawartość fosforu, która wzrosła w serii nienawożonej magnezem pod wpływem 8 i 16 kgN oraz zawartość sodu, która w serii nawożonej Mg rosła do dawki 24 kgN stosowanego dolistnie. Średnie stosunki Ca : P = 0,28, Ca : Mg = 0,39 i K : Ca = 11,9 wskazują na bardzo słabe zaopatrzenie uprawianej odmiany w wapń, natomiast szerokie stosunki K : (Ca + Mg) = 3,32 i K : Mg = 4,60 świadczą o relatywnie wysokiej zawartości potasu i magnezu. Zastosowany dolistnie azot w istotny sposób wpłynął na kształtowanie stosunków pomiędzy składnikami popielnymi w bulwach. Stwierdzono, że raz ze wzrostem pogłównej dawki N następowało zawężanie stosunku Ca : P i Ca : Mg oraz poszerzenie K : (Ca + Mg) oraz K : Ca. Zastosowane nawożenie nie miało wpływu na stosunek K : Mg.

4

Impact of Foliar Nitrogen and Magnesium Fertilization on Concentration of Chlorophyll in Potato Leaves

Ciećko Z., Żołnowski A., Mierzejewska A.

Ecological Chemistry and Engineering. A

|

2012

|

Vol. 19, nr 6

525-535

EN

The objective of the study has been to determine the effect of foliar nitrogen and magnesium fertilization on modifications in the concentration of chlorophyll in leaves of an medium-early edible potato cultivar called Zebra. Different rates of foliar magnesium fertilization were applied, from 0 % to 50 % of the full dose of this nutrient (80 kgN ha–1). The experiment was conducted in three series – without magnesium fertilization, with magnesium applied to soil (24 kgMg ha–1) and with magnesium sprayed over leaves (12 kgMg ha–1). The highest concentration of chlorophyll a and b was obtained in 2005: 137.6 and 53.4 mg 100 g of fresh mass of leaves. In the same year, the highest yield of potato tubers was produced: on average, 27.86 Mg ha–1. This relationship, however, was not confirmed in the subsequent years. In 2006 and 2007, the two years with the weather conditions unfavourable to potato cultivation, the volume of yields was positively correlated with the concentration of chlorophyll in leaves, a relationship which was not detected in 2005, when the yield was the highest. Soil or foliar application of magnesium determined the synthesis of chlorophyll and accumulation of yield, especially in the years characterized by unfavourable weather conditions.

PL

Celem badań było wyjaśnienie wpływu dolistnego nawożenia azotem i magnezem na kształtowanie się zawartości chlorofilu w liściach ziemniaka jadalnego średnio wczesnej odmiany Zebra. Zróżnicowane nawożenie dolistne azotem zastosowano w zakresie od 0 do 50 % pełnej dawki tego składnika (80 kgN ha-1). Eksperyment przeprowadzono w trzech seriach - bez nawożenia magnezem, z magnezem stosowanym doglebowo (24 kgMg ha-1) oraz z magnezem stosowanym dolistnie (12 kgMg ha-1). Największą zawartość chlorofilu a i b uzyskano w 2005 r. - 137,6 mg i 53,4 mg na 100 g świeżej masy liści. W roku tym uzyskano jednocześnie najwyższy plon bulw - średnio 27,86 Mg ha-1. W latach następnych nie potwierdzono tej zależności. Wzrastający udział N stosowanego dolistnie w ogólnej dawce azotu spowodował praktycznie liniowy przyrost ilości obu form chlorofilu. W latach niesprzyjających plonowaniu 2006 i 2007 stwierdzono, że ilość plonów była dodatnio skorelowana z zawartością chlorofilu w liściach, czego nie stwierdzono w roku 2005, w którym plon był największy. Zastosowany doglebowo, jak i dolistnie magnez miał decydujące znaczenie w syntezie chlorofilu i nagromadzaniu plonu szczególnie w latach o niesprzyjających warunkach pogodowych.