Wyniki wyszukiwania - AGRO

1

Effect of differentiated nitrogen fertilization on faba beans yielding

100%

Labuda H.

Vegetable Crops Research Bulletin

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2001

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tom 54

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nr 2

2

Fungi colonizing potato stem bases depending on the method of nitrogen fertilization

100%

Czajka W., Cwalina-Ambroziak B., Brzozowska I., Ciecko Z., Zolnowski A.

Polish Journal of Natural Sciences

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2002

|

tom 12

3

Response of winter wheat to previous crops and nitrogen fertilisation

100%

Blecharczyk A., Skrzypczak G., Spitalniak J.

Fragmenta Agronomica

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1995

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tom 12

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nr 2

4

Mulching and nitrogen fertilization in a prune orchard

100%

Lipecki J., Janisz A., Sienkiewicz P.

Journal of Fruit and Ornamental Plant Research

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2004

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tom 12

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nr Spec.ed.

5

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Effect of nitrogen fertilization on yield, NH4plus and NO3- content of white cabbage

88%

Sady W., Rozek S., Domagala-Swiatkiewicz I., Wojciechowska R., Kolton A.

Acta Scientiarum Polonorum. Hortorum Cultus

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2008

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tom 07

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nr 2

The results of three year investigations with ‘Galaxy’ F1 cabbage grown under field conditions are presented. The effect of the rate of ammonium sulphate and RSM (solution of ammonium nitrate + urea), the method of application (placement and broadcast technique) and foliar fertilization (urea and Supervit K) on the yield and nitrate accumulation was studied. The form of N fertilizer significantly increased the cabbage yield only in 2007. In this year the better nitrogen source was ammonium sulphate in comparison with RSM. In the other years no differences between the kind of N fertilizer were observed. The method of application did not affect cabbage yield any year. However, slightly better cropping was noted for following treatments 75% N broadcasted at planting + 25% N during growth season, 75% N broadcasted at planting + foliar fertilization, and after placement fertilization with reduced rate (75% N) as compared to control (100% N broadcasted at planting), in every year of the experiment. In 2006 and 2007 fertilization at the rate of 75% N and supplemented with addition 25% N during the growth or foliar sprays significantly increased nitrate content in cabbage as compared to control treatment.

6

Dependence of spring triticale yield of grain and yield structure on seed density and nitrogen fertilization

88%

Pilejczyk D., Sienkiewicz S., Krzebietke S., Zarczynski P.

Polish Journal of Natural Sciences

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2003

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tom 14

7

Changes in nitrate content of red beet caused by different methods of nitrogen fertilization

88%

Grzebelus D.

Folia Horticulturae

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1995

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tom 07

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nr 2

8

Effect of nitrogen fertilization on growth and development of Pelargonium X hortorum. I. Effect of different N levels

88%

Lis-Krzyscin A.

Folia Horticulturae

|

1999

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tom 11

|

nr 1

9

The effect of regeneration technology of sward and nitrogen fertilisation on yielding of postboggy meadow

76%

Kulik M., Baryla R., Ciesielski D.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2015

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tom 18

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nr 4

10

Fruit production as influenced by nitrogen fertilization

76%

Wojcik P.

Nawozy i Nawożenie

|

2000

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tom 02

|

nr 3b

11

Role of bioelements [Mg, N, K] and herbicides in establishing vitamin C in potato tubers

76%

Rogozinska I., Wszelaczynska E., Wichrowska D.

Journal of Elementology

|

2005

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tom 10

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nr 4 Suppl.1

86

12

Effect of nitrogen and potassium fertilisation on the content of ions in the soil solution

76%

Murawska B., Spychaj-Fabisiak E.

Journal of Elementology

|

2009

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tom 14

|

nr 4

The aim of the present research was to evaluate whether or not, and to what extent, exclusive mineral fertilisation affects the content of water-soluble ions determining the soil salinity. The soil was sampled from the arable layer of a multi-year field experiment carried out in 1974-2007. The research involved differentiated nitrogen fertilisation (factor I, n=3) and potassium fertilisation (factor II, n=4). The content of water-soluble ions was defined in water extract, in the soil to water ratio of 1:5; cations K+, Na+, Ca2+ were determined with the method of emission spectrometry and Mg2+ – with atomic absorption. Anions were analysed with the argentometric (Cl-) and nephelometric (SO4 2-) methods. In addition, electrolytic conductivity (R) was tested with the conductometric method, based on which the salt concentration in the solution (C) and the ionic strength (I) were calculated. The present results were statistically verified. The prolonged application of intensive nitrogen and potassium fertilisation (32 years) significantly differentiated the content of cations: K+, Na+, Ca2+ and Mg2+ as well as anions: Cl- and SO4 2- in soil solution. The contents of K+, Na+, Ca2+, Mg2+ in the soil solutions differed and fell within the range of (mean value) 0.136-0.507 (0.281) K+, 0.398-0.555 (0.472) Na+, 1-2.192 (1.350) Ca2+ and 0.211- 0.365 (0.272) Mg2+ mmol(+)⋅kg-1. The highest nitrogen dose significantly limited the concentration of SO4 2- in the soil solution, while the different doses of potassium did not result in such significant changes in the concentration of the above ions. The content of chlorine ions in the soil solution did not depend significantly on differentiated nitrogen and potassium fertilisation. No effect of the long-term mineral fertilisation on soil salinity was noted.

13

The optimization of nitrogen fertilization of winter wheat according to the results of soil and plant analysis

76%

Cermak P., Travnik K.

Nawozy i Nawożenie

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2000

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tom 02

|

nr 3b

14

Arylsulphatase activity and sulphate content in relation to crop rotation and fertilization of soil

76%

Siwik-Ziomek A., Lemanowicz J., Koper J.

International Agrophysics

|

2016

|

tom 30

|

nr 3

15

The relationships between nitrogen use efficiency and nitrogen input in crop production in Poland

76%

Faber A., Jarosz Z., Kopinski J., Matyka M.

Polish Journal of Agronomy

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2016

|

nr 26

The study attempted to characterize Nitrogen Use Efficiency (NUE), nitrogen yield (Yn), and N balance (Nb = N surplus) depending on the dose of the total N fertilization (F = N dose in mineral fertilizers, natural fertilizers, or N from deposition). The study included basic crops in Poland in the years 1999–2014. The determination of the relationships between Yn, NUE, Nb, depending on F was performed using the elements of the methodology proposed by Lassaletta et al. (2014). The evaluation of differences between the optimal NUE and the NUE obtained in this study was carried out using the lower limits of the optimal NUE = 70–90%, as proposed tentatively by the EU NEP (2014). The study indicates that in the period of 1999–2014, NUE of basic crops in Poland increased, achieving the weighted average value of 55%. This value was significantly decreased by low NUE of permanent grasslands (42%), which have the largest share (20.3%) in the structure of land use in Poland. It would, therefore, be recommendable to increase NUE on grasslands. The omission of permanent grassland in the analysis increased the weighted average NUE for basic crops on arable lands to the value of 60%. There were no differences found in the weighted average NUE values in the case of more intensive (60%) and more extensive (60%) crops. Assuming that there is a need to increase NUE to the lower level of the optimal value (70%), we concluded, on the basis of our results and discussion, that the most effective way to achieve it would be to improve the NUE of more intensive crops, especially of wheat, triticale and barley. These plants achieve higher grain yields, Yn, Ymax, and Yn gap. They also have a larger share in the crop structure in comparison with more extensive crops.

16

Effect of plant biostimulation with Pentakeep V fertilizer and nitrogen fertilization on the content of macro- and micronutrients in spinach

76%

Smolen S., Sady W.

Journal of Elementology

|

2010

|

tom 15

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nr 2

343-353

The aim of the research was to determine the influence of foliar nutrition with Pentakeep V as well as differentiated nitrogen fertilisation on the content of macro- (Ca, K, Mg, Na, P and S) and micronutrients (B, Cu, Fe, Mn and Zn) in spinach leaves. Pentakepp V is a fertilizer containing 5-aminolevulinic acid (5-ALA), which is the direct precursor of chlorophyll in plants. In 2006-2007, a pot experiment with spinach Spinacia oleracea L. cv. Spinaker F1 was carried out. The plants were cultivated in 60 × 40 × 20 cm containers placed in an open field under a shade-providing fabric. Containers were filled with loamy clay soil (35% of sand, 28% silt, 37% clay) with the organic matter content of 2.44% in 2006 and 2.52% in 2007. The experiment design included 2 sub-blocks: with and without foliar nutrition. The plants were sprayed twice with Pentakeep V fertilizer in a dose of 0.02% w/v (16 ml 100 dm–3 – 3000 dm3 per 1 ha). In each sub-block, soil fertilization with nitrogen was applied: 1 – control (without N fertilization), 2 – 25 mg N dm–3 of the soil (50% of N dose), 3 – 50 mg N dm–3 of the soil (100% of N dose). Nitrogen fertilization was applied in the form of ammonium nitrate prior to seed sowing. Among all of the determined nutrients, a significant interaction between foliar nutrition and soil application of nitrogen was observed in the case of Ca and Fe content in spinach leaves. Foliar application of Pentakeep V decreased the content of Ca in plants without N fertilization as well as increased the amount of this element in plants fertilized with full dose of nitrogen (100% of N dose). These observations were further verified by the changes of Ca content in soil after plant cultivation. Increased uptake of Ca from soil was observed for plants treated with Pentakeep V and fertilized with the full dose of nitrogen. A higher content of this element in soil was noted after cultivation of plants receiving only Pentakeep V (without N fertilization). Specific interaction of Pentakeep V on the increased content of Fe in spinach fertilized with 50% dose of N was observed. In comparison with the control, N fertilization in both doses (regardless of the foliar nutrition) led to the decrease of the plant content of Ca, Na and Fe as well as resulted in the increased concentration of K in spinach leaves. Plants fertilized with half-dose of N were characterized by lower content of Mn but plants treated with 100 % of nitrogen had higher concentration of this element in comparison to the control. Foliar application of Pentakeep V (considered independently of N fertilization) did not significantly influence the content of these nutrients in spinach leaves. Weather conditions throughout both years of cultivation had no effect on the interaction between foliar nutrition with Pentakeep V and N fertilization on the content of analyzed nutrients.

17

Effect of calcium carbonate and differentiated nitrogen fertilization upon the yield and chemical composition of spinach beet

76%

Dzida K., Jarosz Z.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2010

|

tom 09

|

nr 3

Fertilizing cultivable plants is an effective way of improving yield quantity and quality. The studies conducted in the years 2008–2009 were aimed at determining the relationship between the kind of nitrogen fertilizer, manner of its application, as well as the dose of calcium carbonate and the plant unit weight, as well as chemical composition of spinach beet, grown in glasshouse in the spring period. Nitrogen was applied in the form of ammonium sulphate and urea in a localized form (N-deposit) and in the form of solution. Calcium was administered in the form of calcium carbonate in the doses of 5 and 15 g · dm-3 of substratum. The length of leaves, plant unit weight and selected parameters of beet leaf utility value were assessed. The substratum was also analyzed after plant harvest. The highest unit weight of plants was obtained with the application of ammonium sulfate in the form of a solution with a lower calcium carbonate dose, compared to the remaining combinations. The examined spinach beet plants were distinguished by high contents of dry matter, protein, total nitrogen, potassium, calcium and magnesium The chemical composition of leaves was significantly differentiated, depending on the examined factors. The contents of nitrates in the leaf dry matter ranged from 0.26 to 0.45%, depending on the kind of nitrogen fertilizer and manner of its application. The applied nitrogen fertilization to a small extent influenced the concentration of nitrates in beet leaves. More nitrates were contained in plants fed by a higher dose of calcium carbonate, compared to the plants which were given a lower dose of CaCO3. The highest content of vitamin C and the lowest share of nitrates in leaf dry matter were obtained with the application of urea in the form of deposit with a lower dose of calcium carbonate.

18

Nitrogen fertilizer advisory system and monitoring in Hungary

76%

Loch J., Szabo Emese B., Pirko B.

Nawozy i Nawożenie

|

2009

|

nr 37

19

Nawozenie azotem wiosna

76%

Pecek J.

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

|

2006

|

nr 05

19

20

Changes in nitrogen and magnesium contents in pea under the effect of nitrogen fertilization

76%

Symanowicz B., Kalembasa S., Jaremko D., Krasuski S.

Acta Scientiarum Polonorum. Agricultura

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2020

|

tom 19

|

nr 4

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