Influence of adaptive systems of the basic cultivation and fertilizing on the content of easy-hydrolyzable nitrogen in light grey forest soil of Polissya

Abstract

The purpose. To determine dynamics of the content of easy-hydrolyzable nitrogen at long-term application (25 years) of soil-protective techniques in conditions of different fertilizer systems. Methods. Field, laboratory, variation-statistical and relative analysis. Results. It is determined that the content of easy-hydrolyzable nitrogen in arable layer (0 — 20 cm) of light grey forest soil in the end of the 3-rd crop rotation have made 4,02 — 11,6 mg/100 g of soil (109,3 — 315,5 kg/hectare). That testifies to low extent of security of plants with the given nutrient. Conclusions. Agricultural techniques, which are based on minimization of cultural operations (subsurface and disk cultivation), in a combination with organic-and- mineral fertilizer system have ensured the high content of easy-hydrolyzable nitrogen – 312,8 — 315,5 kg/hectare.