EFFECT OF OXIDATIVE-REDUCTION CONDITIONS ON THE PHOSPHORUS DYNAMICS IN SOILS OF DIFFERENT GENESIS DEPENDING ON THE LEVEL OF MOISTURE

Abstract

The results of study of the effect of oxidation-reduction conditions on the behavior of phosphorus in acidic soils of different genesis depending on the level of moistening are presented. It has been shown that excessive moisture of the soil leads to a sharp change in the oxidation-reduction equilibrium towards the development of regenerative processes. Studies confirmed that under conditions of waterlogging, a sharp increase in the mobile (ferrous) forms of iron occurs in all variants of the experiment. Thus, it can be argued that the increase in ferrous forms of iron is an important diagnostic sign of the intensity of development of regenerative processes in the soil environment. The mobilization of reactive ferrous forms leads to a deterioration of the phosphate state of the soil, due to the fixation of phosphate ions in forms inaccessible to plants. Together with this, with contrasting changes in oxidation-reduction conditions, it is possible to accumulate them into nodules.