Shkliar V. Humus state of gray forest soil dependeng from chemical melioration and different fertilization systems

The object of research - the process of optimizing the content of humus and transforming its qualitative composition in gray forest soil under intensive agriculture. The purpose of the research was to determine the conditions for the increase of humus reserves and intensification the processes of humification in the gray forest soil of the Forest-steppe, based on the application of rational measures to improve its properties, to reproduce the potential and increase the effective fertility. Methods - field, laboratory, calculation-comparative, comparative-analytical. For the first time, in the conditions of the Right Bank Forest-Steppe found parameters of changes in the content of moving humic acids (10,26-12,74 % of the total carbon content) in gray forest soil, for which the highest productivity level of crop rotation part has been obtained on 8-10 years after re-liming and systematic fertilization. It is substantiated and recommended for the production effective doses of chemical meliorants on the gray forest loamy soil, which in combination with organic and mineral fertilizers, increase the productivity of crop rotations part by 1,83-2,53 t/ha of grain units. The main results of the research were tested and implemented in Cherkasy state agricultural research station NSC "Institute of Agriculture of NAAS" on the total area of 80 hectares and "Agro-Ros" on a total area of 150 hectares. The field of use is agricultural production.