Dependence of the content of microbial biomass in typical black soil on agrogenic factors and year season

Abstract

Abstract The authors of the paper found that the nature and direction of the seasonal dynamics of the content of microbial biomass in typical black soil in grain-fallow crop rotation differ depending on the slope direction, the cultivation system and the soil layer. The characteristics of the dynamics of the content of microbial biomass in typical black soil in the agroecosystem of grain-fallow crop rotation, depending on the slope direction and the type of soil cultivation are revealed. The influence of the slope direction on the dynamics of the microbial biomass in the soil is more pronounced in the layer of 10-20 cm. The need to ensure the supply of a sufficient amount of post-harvest residues and organic fertilizers to the soil is shown. The increase in the uniformity of the upper layer of typical black soil is associated with the constant mechanical man-made impact on it. The obtained results about the nature of the impact of the studied factors on the seasonal and spatial variability of microbial biomass can be used in the development of systems for the management of the biological activity and reproduction of organic matter in black soils in order to improve their ecological state. The results of studies of the ecologically and agronomically important soil component i.e. microbial biomass are necessary for the development of systems for the regulation of soil fertility in order to increase their productivity, as well as for the development of a control system for the content of microbial biomass in black soils. The experimental data can serve as the basis for a database on the microbial pool of various soils and ecosystems, which is advisable to use for model predictive calculations, including in different ecological scenarios. The assessment of the state of organisms living in the soil and their biodiversity are important in the solution of the problems of environmental practice: identification of zones of ecological disadvantage, calculation of damage caused by man-made activities, determination of the stability of the ecosystem and the impact of certain anthropogenic factors.