Wyniki wyszukiwania

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Effect of crop rotation on potassium forms and their bioavailability in a long-term trial on black earth. Part II. Four-course crop rotation

100%

Grzebisz W., Gawronska-Kulesza A.

Polish Journal of Soil Science

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1995

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tom 28

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nr 2

119-124

2

Bilans potasu w zróżnicowanych warunkach nawozowych

100%

Szymanska M., Korc M., Labetowicz J.

Nawozy i Nawożenie

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2009

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nr 34

3

Effect of crop rotation on potassium forms and their bioavailability in long-term trial on a black earth. Part I. Three-course crop rotation

100%

Grzebisz W., Gawronska-Kulesza A.

Polish Journal of Soil Science

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1995

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tom 28

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nr 2

111-117

4

Wpływ wzrastającego nawożenia potasem na zawartość róźnych form składnika w glebie

80%

Grzywnowicz I.

Nawozy i Nawożenie

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2009

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nr 34

5

Zawartość form potasu w glebie w warunkach trwałego doświadczenia nawozowego

80%

Szymanska M., Labetowicz J., Korc M.

Nawozy i Nawożenie

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2005

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tom 07

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nr 3[24]

6

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Dynamika plonowania, pobierania potasu przez rosliny oraz zmiany roznych form tego skladnika w glebie w zaleznosci od zasobnosci gleb w K w doswiadczeniu wieloletnim

80%

Stepien W.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1995

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tom 421a

345-354

Increasing doses of K were applied to 3 fields for eight years (1975-1983) conducted to obtain four potassium levels in soil (very poor, poor, medium rich and rich). Four doses of K (0, 70, 140, 280 kg K/ha) were applied on each of K soil level in 1983-1988, and after-wards. Residual effects of K were studied. Since 1975 3 corps (barley s., coksfoot, potatoes) on 3 fields crop rotation were grown every year. The influence of the above treatments on K exchange and K fixed in soil, yields, uptake of K by plants and K balance were studied. The similar K level in soil has been observed for many years, if negative K balance has not exceeded 50 kg K/ha/year. The increase of K exchanged is observed when potassium fertilization was provided for six years with the dose of 140 or higher kg K per hectare. After three year period without any potassium fertilization, yields of plants, K content in plant and soil on plots previously fertilized with high K dose, were still higher.

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Wplyw nawozenia mineralnego, szczegolnie azotowego, na zmiany zawartosci roznych form potasu w gorskich glebach lakowych

71%

Grzywnowicz I.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1996

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tom 442

125-134

This work contains the results of 4 pot experiments concerning the effect of mineral fertilization with limitation of the potassium dose on yielding of reygrass and on changes of different potassium forms in soils. The experiments were conducted on four mountain meadow soils with very differentiated mechanical composition (35-68% fine particles), cation exchange capacity (9-30 m M(+)/100g of soil) and pH 4,1-6,6. The soils used in the experiments also were differented in the content of available phosphorus (2,1-27,2 mg P₂O₅/lOO mg of soil) and potassium (9,7-49,6 mg K₂O/100 g of soil). The changes of active potassium were examined: in the water extract and in the extract of 0,01 M CaCl₂, mobile potassium was determined according to Egner-Riehm method and examined in the extract of 1 M ammonium acetate, reserve potassium was determined in 1M HNO₃ and examined in hot conditions in series fertilized with potassium and with omitting of this element in the fertilizing dose. Calculated correlation coefficients between yield, uptaking of potassium by meadow plants and examined potassium forms in the soil showed that under circumstances of growing depletion of potassium from the soil, the biggest correlation was obtained for the reserve forms.

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Zawartość różnych form K oraz wymiennych form Ca, Mg i Al w zależności od wieloletniego nawożenia tymi składnikami

71%

Szara E., Stepien W., Mercik S.

Nawozy i Nawożenie

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2005

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tom 07

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nr 3[24]

9

Wpływ gatunku traw, poziomu nawożenia potasem i azotem na formy potasu w glebie

71%

Lehmann K., Matlosz C., Stachowiak J., Wysocka G.

Roczniki Gleboznawcze

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1991

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tom 42

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nr 3-4

Ograniczanie wyników

4 Nawozy i Nawożenie

2 Polish Journal of Soil Science

2 Zeszyty Problemowe Postępów Nauk Rolniczych

1 Roczniki Gleboznawcze

2 Gawronska-Kulesza A.

2 Grzebisz W.

2 Grzywnowicz I.

2 Korc M.

2 Labetowicz J.

2 Stepien W.

2 Szymanska M.

1 Lehmann K.

1 Matlosz C.

1 Mercik S.

1 Stachowiak J.

1 Szara E.

1 Wysocka G.

2 2009

2 2005

1 1996

3 1995

1 1991

Effect of crop rotation on potassium forms and their bioavailability in a long-term trial on black earth. Part II. Four-course crop rotation

Bilans potasu w zróżnicowanych warunkach nawozowych

Effect of crop rotation on potassium forms and their bioavailability in long-term trial on a black earth. Part I. Three-course crop rotation

Wpływ wzrastającego nawożenia potasem na zawartość róźnych form składnika w glebie

Zawartość form potasu w glebie w warunkach trwałego doświadczenia nawozowego

Dynamika plonowania, pobierania potasu przez rosliny oraz zmiany roznych form tego skladnika w glebie w zaleznosci od zasobnosci gleb w K w doswiadczeniu wieloletnim

Wplyw nawozenia mineralnego, szczegolnie azotowego, na zmiany zawartosci roznych form potasu w gorskich glebach lakowych

Zawartość różnych form K oraz wymiennych form Ca, Mg i Al w zależności od wieloletniego nawożenia tymi składnikami

Wpływ gatunku traw, poziomu nawożenia potasem i azotem na formy potasu w glebie