Regulation of nutritive regime of typical black earth at entering defecation residues in conditions of Forest-steppe

Abstract

The purpose. To study influence of defecation residues gained with the help of new technique in grainbeet crop rotation upon content of primary nutritive elements in typical leached slightly sour black earth. Methods. Physical and chemical agrochemical analysis of soil and phenological observation over growth and development of plants. Results. Use of improver in dose of 1,0 (calculated using index of hydrolytic acidity of soil (4,9 t/hectare in physical weight)) with mineral fertilizer (N90P60K90) in the autumn under disking of stubble with the subsequent ploughing, promotes heightening of content of alkali-hydrolyzed nitrogen up to 137,0 mg/kg, mobile phosphorus – up to 201,4, exchangeable potassium – up to 117,3 kg/kg of soil that exceeds indexes of control treatments for 11,0; 64,0; 53,3 mg/kg of soil accordingly. Conclusions. Importation of defecation residues gained with the help of new technique promotes restoration of the content of primary nutritive elements in typical leached slightly sour black earth.