Effect of effluent on spring barley yield and soil microbiological activity indicators

Abstract

The use of organic fertilizers is an integral part of the transition to biologization of agricultural production. The chemical active ingredients of modern pesticides can have an impact not only on cultivated plants, but also on the environment. They accumulate in the soil, water, and are absorbed by wild plants, which leads to deterioration of human and animal health. The use of the biogas plant effluent makes it possible to increase the share of biological fertilizers in the technology of spring grain cultivation. At the same time, the yield of spring barley increases, and the quantitative composition of soil microflora changes. The research was conducted on the territory of the Agricultural Technology Park of the Vyatka State Agricultural University (Russia) on sod-podzolic soils. It was found that the greatest yield of barley is provided by seed treatment with effluent and Pseudobacterin-2, as well as pre-sowing application of effluent to the soil. The increase in seed yield was 1.74 dr / ha with a yield of 32.9 dr / ha. When the effluent is applied directly to the soil on the roots of plants, a significant decrease in the content of ammonifying microorganisms is observed and the number of microorganisms that assimilate the mineral nitrogen of the soil increases. When an effluent of 32 t / ha is added to the soil, the greatest accumulation of microorganisms that consume mineral forms of nitrogen occurs.