Wyniki wyszukiwania

1

Results of long-term nutrition trials with increasing intensity of nitrogen nutrition

100%

Ciganek K., Travnik K.

Fragmenta Agronomica

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2005

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tom 22

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nr 1

2

Estimation of efficiency of oat nitrogen top-dressing

84%

Batalova G., Gorbunova L.

Annals of Warsaw University of Life Sciences - SGGW. Agriculture

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2009

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nr 53 Agric.Forest Eng.

17-22

3

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Influence of formulation of phosphorus fertilizer on nitrogen uptake and its efficiency under maize grain cropping

84%

Potarzycki J.

Acta Scientiarum Polonorum. Agricultura

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2009

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tom 08

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nr 3

The aim of the paper was to evaluate the efficiency of nitrogen from ammonium saltpeter as related to the formulation of phosphorus fertilizer under maize grain cropping. Maize was grown in monoculture throughout the consecutive years 2003-2007. A two factorial field experiment was established at a farm located in Nowa Wieś Królewska (52°26’ N; 17°57’ E) on a slightly acidic soil, moderately rich in phosphorus. Experimental factors were as follows: (i) chemical formulation of the fertilizer, (partially acidulated phosphate rock – PAPR, simple superphosphate – SSP and triple superphosphate – TSP), (ii) nitrogen rate: 80 and 140 kg N·ha⁻¹; a phosphorus unfertilized treatment was also considered. The type of phosphorus fertilizer did not differentiate nitrogen uptake, but the lack of phosphorus at the applied rate has induced a decrease in nitrogen accumulation in the aboveground biomass, on average by 8%. Phosphorus fertilization at the rate 26.4 kg P·ha⁻¹ was the main determinant of nitrogen uptake by the kernels. Nitrogen recovery (R) from the fertilizers as well as its agronomical (AE) and physiological (PE) efficiency were significantly lower in treatments where phosphorus was not applied. Furthermore, it was found a positive effect of sulphur from simple superphosphate on the AE after the application of 80 kg N·ha⁻¹. The R values did not depend on the chemical formulation of phosphorus in the fertilizer and amounted on average to 74 and 59% for the rates 80 and 140 kg N·ha⁻¹, respectively, whereas for the treatment without P, these values varied within the range 46-54%.

4

The application of the Nmin soil test as an element of integrated nitrogen management strategies in agriculture

67%

Wiesler F., Armbruster M.

Nawozy i Nawożenie

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2009

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nr 37

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Agricultura

1 Annals of Warsaw University of Life Sciences - SGGW. Agriculture

1 Fragmenta Agronomica

1 Nawozy i Nawożenie

1 Armbruster M.

1 Batalova G.

1 Ciganek K.

1 Gorbunova L.

1 Potarzycki J.

1 Travnik K.

1 Wiesler F.

3 2009

1 2005

Results of long-term nutrition trials with increasing intensity of nitrogen nutrition

Estimation of efficiency of oat nitrogen top-dressing

Influence of formulation of phosphorus fertilizer on nitrogen uptake and its efficiency under maize grain cropping

The application of the Nmin soil test as an element of integrated nitrogen management strategies in agriculture