PHOSPHORUS MOBILITY AND DISTRIBUTION IN HAPLIC CHERNOZEM UNDER VARIOUS AGROTECHNOLOGIES

Abstract

The study of the features of the content and profile distribution of total and available phosphates, depending on the applied agrotechnologies (traditional, minimal and No-till), was carried out. The object of the study was Haplic Chernozem carbonate of the southern zone of the Rostov region. The significant influence of the applied agricultural technology on the phosphate state of winter wheat agrocenoses was noted. The use of resource-saving technologies contributes to the accumulation of potential phosphate reserves in the upper horizons of the soil in comparison with the traditional technology with dump ploughing. The involvement of soil in agricultural production leads to an increase in the content of available phosphates (by 28-64 % in the Ap horizon, compared to virgin soil). The intensity of agricultural technology affects the mobility of phosphorus in the soil differently. In areas with dump ploughing, the maximum increase in the content of available phosphates was noted, both in comparison with the Chernozem of the virgin soil, and with the introduction of resource-saving agricultural technologies.