Wyniki wyszukiwania

1

Fertilization factors determining phosphorus balance under the conditions of permanent fertilization experiment

100%

Labetowicz J., Korc M.

Annals of Warsaw Agricultural University. Agriculture

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1999

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nr 35

31-38

2

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Effect of differentiated fertilization on the content of soil organic carbon in the conditions of long-term fertilization experiment

100%

Rutkowska B., Szulc W., Labetowicz J.

Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura

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2004

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tom 59

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nr 1

3

The effect of NPK fertilisation on mineral phosphorus fraction content in soil

80%

Acta Agrophysica

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2017

|

tom 24

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nr 2

A field experiment, conducted on loess-derived gray-brown podzolic soil, evaluated the effect of different levels of intensive fertilization with nitrogen, phosphorus and potassium on the soil content of mineral phosphorus fractions which are the major but varying source of this nutrient for crop plants. Before the establishment of the experiment, the soil contained 77.2 mg P kg–1, 187 mg K kg–1, 44 mg Mg kg–1, and 1.18% of humus, whereas pHKCl was 4.9. The experiment consisted of twenty seven fertilization treatments – nine nitrogen and potassium fertilization treatment combinations, each in four replicates, were carried out in relation to three increasing levels of phosphorus fertilization. Phosphorus fraction was indicated with the modified Chang-Jackson method. Mineral nitrogen, phosphorus and potassium fertilization after timothy grass harvest significantly affected the easily soluble phosphate fraction content in soil. Phosphorus fertilization caused the highest increase, while this increase was lower in the case of potassium and nitrogen fertilization. Mineral fertilization (with nitrogen, phosphorus, and potassium) used in the experiment caused a significant increase of the content of aluminium phosphate fractions in soil. Evaluating iron phosphate fraction content in soil, it can be concluded that it was the most stable fraction and that mineral fertilization at increasing NPK rates essentially did not have any statistically proven effect on its occurrence. Among the three fertilizer nutrients applied (NPK), phosphorus and potassium fertilization caused a significant increase in calcium phosphate fraction content in soil. The application of nitrogen was not found to have such an effect. Mineral NPK fertilization significantly affected the total mineral phosphorus fraction content in soil. A systematic increase in the total fraction analysed was found primarily under the influence of phosphorus and potassium fertilization. Phosphorus applied as granulated triple superphosphate was primarily transformed in the soil into fractions of iron and aluminium phosphates, to lower extent into calcium phosphate fraction, and – to the lowest extent – into easily soluble phosphates fraction.

4

The most important soil properties and yields of plants in 80 years of static fertilizing experiments in Skierniewice

80%

Mercik S., Stepien W.

Fragmenta Agronomica

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2005

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tom 22

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nr 1

5

Nawozy organiczne - prochnica - wyzsze plony

71%

Mackowiak C.

Agrochemia

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1995

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nr 09

16-18

6

Influence of mineral fertilisation on the yield and macroelement content in sugar beet

61%

Acta Agrophysica

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2017

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tom 24

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nr 2

The aim of this study was to assess the influence of mineral NPK, Mg and micronutrient fertilisation on the content of macroelements and root yield of a sugar beet cultivar called Khazar. The effects of three fertilisation levels were assessed. Additionally, the highest NPK dose was analysed in treatments with NPK + Mg and micronutrients (B, Cu, Zn, Mn). The increasing level of NPK fertilisation as well as the nutrition with magnesium and micronutrients caused an increase in root yield. The highest yield of roots was achieved by beet plants fertilised with the high NPK dose combined with magnesium, boron, copper and zinc. It was demonstrated that roots fertilised with the 3NPK dose and magnesium tended to accumulate more N-total. At the same time, the applied micronutrients contributed to a decline in the N-total content of dry matter in roots. The analysed fertilisation with NPK and micronutrients did not affect the content of phosphorus, potassium and calcium in either of the two beet organs. In general, beet leaves were characterised by higher concentrations of nutrients than roots.

7

Przydatność nawozów azotowych o działaniu spowolnionym w nawożeniu facelii błękitnej i marchwi zwyczajnej

51%

Kucharski J.

Acta Academiae Agriculturae ac Technicae Olstenensis. Agricultura

|

1992

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tom 54

43-52

W doświadczeniach wazonowych testowano wpływ 7 nawozów azotowych o działaniu spowolnionym na plonowanie i skład chemiczny facelii błękitnej oraz 4 nawozów na plonowanie i skład chemiczny marchwi zwyczajnej. W wyniku badań stwierdzono, że najkorzystniej na plonowanie roślin oddziałuje: IBDU o małych granulach (0,2-0,75 mm), Gold N, CDU i agramid, a najgorzej: Nitroform Blue Powder, Nitroform White Powder i IBDU o dużych granulach (0,75-2,5 mm). Szczególnie dodatnio badane nawozy wpływały na wzrost i rozwój marchwi. Marchew lepiej też wykorzystywała z nich azot niż facelia. Pozytywnie na plonowanie marchwi i wykorzystanie azotu, z wszystkich testowanych nawozów, oddziaływał N-Serve.

8

Dokarmianie bardzo wczesnych ziemniaków

41%

Sztuder H., Swierczewska M.

Agrochemia

|

2000

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nr 06

Ograniczanie wyników

2 Acta Agrophysica

2 Agrochemia

1 Acta Academiae Agriculturae ac Technicae Olstenensis. Agricultura

1 Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura

1 Annals of Warsaw Agricultural University. Agriculture

1 Fragmenta Agronomica

2 Labetowicz J.

1 Korc M.

1 Kucharski J.

1 Mackowiak C.

1 Mercik S.

1 Rutkowska B.

1 Stepien W.

1 Swierczewska M.

1 Sztuder H.

1 Szulc W.

2 2017

1 2005

1 2004

1 2000

1 1999

1 1995

1 1992