V.V. Okorkov
Vladimir Research Institute of Agriculture, ul. Tsentralnaya, 3, pos. Novy, Suzdalsky r-n, Vladimirskaya obl., 601261, Russian Federation
Summary. On gray forest soils of the Vladimirskoe Opolie it was studied the influence of different fertilization systems with the use of animal waste on the productivity of crops, recoupment of nutrients and reserves of nitrogen mineral forms. In the four-field grain-row crop rotation with the single introduction up to 620 kg/ha of nitrogen the possibility of recovery of wastes without pollution was established. The recoupment of the nutrients by the increase in this case was 2.8 times lower (3.2 grain units/kg a.s.) than for recommended doses of mineral fertilizers. The recoupment of organic fertilizers increased with the lower fertilizer rates and with larger nitrogen fraction in total nutrients. In the second field experiment at a close ratio of the nutrients the recoupment of their unit of nutrients for the full mineral fertilizer and combination of it and NK with organic fertilizers decreased in a linear relationship with the increased doses of application. The recoupment of organic fertilizers deflects from it downward. The experimental recoupment was 1.4-2 times lower, than that, calculated according to this relationship. In organic and mineral systems the fertilizers were the most profitable, if the ratio of organic and mineral nitrogen was close to 1 (1:1.2 vs. 2:1.2). The productivity of grain crops is determined by stocks of nitrate nitrogen in the soil layer 0-40 cm at the early stages of growth and development, and increased according to a power law from 3.1 to 4.1 thousand of grain units/ha. Without fertilization, these reserves was 44-45 kg/ha, increased to 60 kg/ha with the application of 200 kg/ha of nitrogen from organic fertilizers, up to 80-150 kg/ha with full mineral (N40-80P40-80K40-80) and organic and mineral (a combination of 100 and 200 kg/ha of nitrogen from organic fertilizer with annual application of N40P40K40 or N40K40) systems.
Keywords: gray forest soil, fertilizer systems, grain-row crop rotation, grain crops, payback of unit of nutriments, reserves of nitrate nitrogen.
Author Details: V.V. Okorkov, D. Sc. (Agr.), head of division (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.).
For citation: Okorkov V.V. About Efficiency of Local Organic Fertilizers on Soils of the Vladimirskoe Opolie. Dostizheniya nauki i tekhniki APK. 2015. Vol. 29. No 11. Pp. 65-69 (in Russ.)