Natural indexes of pedogenesis and aftereffect of their destabilising for implementation in agricultural practice

Abstract

The purpose. Generalization of a role of natural factors of pedogenesis and comparison of their change and implementation in conditions of agroecosystems steppe agricultural landscapes with the purpose to create the level of natural pedogenesis. Methods. Theoretical, laboratory-field, graph-analytic, variation-statistical. Results. Function of pedogenesis is created in conditions of agricultural systems according to 2 groups of factors: the first one ensures saving plant residues and promotes increase of fertility of soils; the second one creates conditions for lowering fertility of soils (drainage and erosion of soils). In conditions of cyclicity of rains (2000 – 2015) theoretical curves of security of an index of rain are determined by probability of overflow up to 10, 25 – 50 and 60 – 90% and levels of their manifestation in seasons of year. Conclusions. The system of soil-protection measures is necessary for regulating natural potential of soils which does not contradict natural process of V. Dokuchayev’s pedogenesis and considers premises of cyclic weather effect on erosion processes.