NITROGEN AND SULPHUR FERTILIZATION ON YIELDING AND ZINC CONTENT IN SEEDS OF WINTER RAPE 'BALDUR' CULTIVAR

The research was conducted in order to determine the yield of winter rape seeds and zinc content in seeds as a result of fertilization with different doses of nitrogen and sulphur. A three-year field experiment was conducted according to the following scheme (9 treatments): 1. control - without fertilization; 2-4. nitrogen fertilization with doses of 134, 180, and 225 kgN . ha(-1) in the form of ammonium nitrate (34 % N); 5-7. nitrogen fertilization with doses of 134, 180, and 225 kgN . ha(-1) in the form of Saletrosan 26 Makro (26 % N and 13 % S); 8. sulphur fertilization with a dose of 60 kgS . ha(-1) in the form of Saletrosan 26 Makro along with nitrogen complementation with ammonium nitrate to a dose of 180 kgN . ha(-1); 9. sulphur fertilization with a dose of 60 kgS . ha(-1) in the form of Saletrosan 26 Makro along with nitrogen complementation with ammonium nitrate to a dose of 225 kgN . ha(-1). Sulphur application led to an increase in the yield of rape seeds and seed zinc content (and, as a result, also in the element uptake with yield), in comparison with the yield and zinc content in seeds collected from treatments without sulphur application.