Chemical composition of sugar beet resulting from different NPK fertilization periods and doses
1999
Bieniaszewski, T. (Akademia Rolniczo-Techniczna, Olsztyn (Poland). Katedra Produkcji Roslinnej)
The effect of increasing NPK fertilization (180-900 kg of NPK) and date (1st variant - before sowing; 2nd variant - 1/2 of the dose before sugar beet sowing and 1/2 after plant thining; 3rd variant - 1/3 of the dose before sugar beet sowing, 1/3 after thining and 1/3 after row closing) on the sugar beet yield was determined in the course of three-year field experiment. The doses of nitrogen over 180 kg N/ha the decrease of a sugar content and the significant increase of the ash, potassium and magnesium in roots. The increased fertilization with NPK caused a high increase of total and protein nitrogen both in leaves and roots too. The delay of sowing term caused the decrease of sugar content in roots and contributed to the increase of total and protein nitrogen as well as a crude ash in roots and leaves
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