Промежуточные посевы как резерв увеличения производства кормов и продуктивности пашни
2011
Privalov, F.I. | Dolgova, E.L., National Academy of Sciences (Belarus). Scientific and Practical Center for Arable Farming
In the conditions of the Republic of Belarus there were presented data on influence of nitrogen fertilizers on yielding capacity of winter rape (Brassica napus) of Lider variety free from erucidic acid and with low content of glucosinolates of stubble sowing. The article shows the dependence of the nitrate content in rape green mass on nitrogen doses and its payback by dry matter yield. In course of the study there was analysed dynamics of yield formation and linear growth of plants. There was determined entrance of the main nutritive elements (N, P, K) into plants, content of protein and nitrates. Results of two-year studies showed that winter rape free from erucidic acid and with low content of glucosinolates in the stubbly sowings showed the following reaction to application of nitrogen fertilizers: increasing of dry matter content in 2,9 times. Increasing of nitrogen doses caused the increasing of yielding capacity but lowered its recoupment of dry matter or green mass. Recoupment of applied fertilizers per 1 kg of NPK by dry matter yield lowered in 2,2-2,4 times in comparison with application of only nitrogen (90-120 kg/ha).
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