Optimization of nutrition of winter crops in conducting top-dressing with mineral fertilizers

The results of field experiments on the research of influence of top-dressing with mineral fertilizers on conditions of food and efficiency of three grades of winter rye in the conditions of Southern Mi-nusinsk natural district of Krasnoyarsk Region are given in the study. For control of conditions of food of winter rye of grades Vlad, Tetr, Yeniseika was carried out soil, vegetable (fabric and chemical), biometric diagnostics. Optimum moisture security of crops of all grades of winter rye when carrying out was established in top-dressing with fertilizers. The chernozyom lixivious highly humified experimental sites had raised maintenance of all elements of mineral food. The point of supply of plants with ni-trogen on tissue diagnostics significantly increased, and the spatial variation of this indicator decreased at top-dressing by ammonium nitrate supplementa- tion and aquarium 5. The respond on this reception of the grades Tetr and Vlad was stronger. The im-provement of chemical composition of plants of winter rye, the optimization of biometric indicators when carrying out top-dressing, was noted by es-pecially ammonium nitrate and ammonium sulfate. Winter rye Vlad in the conditions of bad wintering poorly responded to early-spring top-dressing by fertilizers, but gave essential increases of the crop, well wintering. Maximum statistically reliable rise of productivity of grain was got when carrying out top-dressing with ammonium nitrate varieties of grades of winter rye Tetr and Yeniseika.