Formation of symbiotic apparatus and grain productivity of soybean depending on fertilization in conditions of Western Polissya

Abstract

Symbiotic nitrogen fixation takes the leading role in ensuring the biological nitrogen to agrocenoses. The expansion of its scope will improve the soil fertility, reduce the energy costs in agriculture and reduce the technogenic burden on the environment. It was proved that fertilization and liming aftereffect positively influenced the work of symbiotic apparatus and productivity of soybean. It was established that the fertilization of N40P60K60 by the after-effect of 2.0 norms of limestone ameliorants and micronutrients foliar application on the background of the use of cereals by-products as fertilizer is highly effective on sod-podzolic soils of Western Polissya of Ukraine that contributes to intensifying the formation and development of nodules on soybean roots and obtaining significant increases of grain yield. Mathematical models of soybean yield, which allow based on the indicators of amount and weight of root nodules to predict reliable soybean yield levels have been researched and developed.