Agrochemical and biological factors for optimization of mineral nutrition of wheat at long-term fertilizer application

Abstract

Agrochemical and biological factors for optimization of mineral nutrition of wheat at long-term fertilizer
application. E.T. NAUMCHENKO, E.V. BANETSKAYA (All-Russian Scientific Research Institute of Soybean, Blagoveshchensk).

The article presents the research results of the influence of mineral nutrition conditions on the wheat productivity. It was established that on the background of the after effect of long-term annual application of N24Р30 + 4.8 t/ha of manure per 1 ha of the crop rotation area, the coefficient of mineralization in the stem elongation stage was maximum and amounted to 4.76 against 2.33 in the tillering stage that indicates a positive intensity trend of transformation processes of organic matter in soil. In the tillering stage, the content of mobile phosphorus (β = 0.50) in the arable layer and the number of ammonifying bacteria (β = 0.50) have the most significant effect on the change in wheat yield. The content of mineral nitrogen (β = 0.63) is the most significant for crop productivity in the stem-extension stage. The change in grain productivity of wheat by 71 % is  determined by the content of mineral nitrogen, mobile phosphorus in the arable layer of soil, and the number of microorganisms of nitrogen metabolism in the stem elongation stage.