Agrochemical indexes of black earth depending on fertilizer system of sugar beet and links of crop rotations

Abstract

The purpose. To study influence of links of crop rotations on the content of mineral nitrogen, mobile phosphorus, exchangeable potassium depending on application of fertilizers, postharvest residues of winter wheat in sugar beet sowings. Methods. Field, laboratory. Results. 3-years results of study of influence of mineral and organic fertilizers in the form of straw upon agrochemical indexes of typical weakly alkaline black earth in conditions of Forest-steppe are brought. Conclusions. At application of organomineral fertilizer system agrochemical indexes of typical weakly alkaline black earth are increased. During period of shoots of sugar beet use of straw + N140P120K90 heightened the content of mineral nitrogen within the limits of 18,3-20,8, mobile phosphorus — 43,0 – 50,7, exchangeable potassium — 125 – 135 mg/kg of soil. That did not yield to alternative with importation of dung in dose of 25 t/hectare + N90P120K90.