The effectiveness of the primary tillage system using green manure, biological products and fertilizers on typical black soil in the Chechen Republic

Abstract

The results of studies within the framework of the state task on the topic: “To scientifically substantiate a resource-saving system of basic tillage using organic fertilizers and biological products for the sustainable production of crop production, preservation and reproduction of soil fertility on black soil typical of the Chechen Republic,” are presented. The research has been conducted since 2018 at the Chechen Agricultural Research Institute. According to the research phase, soil fertility and crop productivity were studied depending on the main processing system using green manure, biological products and mineral fertilizers. The primary tillage system included: plowing, disking and chiseling. The results of the experiment showed a positive effect of the primary tillage system and green manure on its fertility, mainly indicators are better when plowing. The humus content in the soil is higher during plowing in the “NPK” variant, where in the arable layer it is 4.1 % (average level), in the arable layer – 3.7 % (low level). The nitrogen content is higher when plowing the soil in the “NPK + biological product” variant, where in the arable layer – 28 mg/kg, in the subsoil layer – 21 mg/kg, which refers to an increased level. Potassium indices are higher for soil chelating in the “NPK + biological product” variant – 220 mg/kg in the arable layer (average content), 130 mg/kg in the sub-arable layer (low content). The phosphorus content is higher when plowing the soil in the “Biopreparation” variant – 28 mg/kg in the arable layer and 17 mg/kg in the arable layer, which refers to the average level.