THE ASSESSMENT OF HUMUS STATE OF ALLUVIAL DEMO-HUMUS SOIL WHEN USING VERMICOMPOST
The possibility of processing large-scale waste of the forest industry (sawdust) and agricultural production (bird droppings) by the method of vermiculture into an effective environmentally friendly fertilizer - vermicompost, which was obtained at the Department of Soil Science and Agricultural Chemistry of Krasnoyarsk State Agrarian University by mixing both components in 1: 1 ratio and pre-composting them for 3 weeks. As a filler-builder for the above wastes 25 % of the soil was used and then all these components were mixed and populated with worms, having previously checked this mixture for toxicity. Vermicomposting was carried out for 3 months. The purpose of the study was to evaluate the effect of different doses of obtained vermicompost on humus state of alluvial dark humus soil, located in Krasnoyarsk forest-steppe. The objectives of the study were to determine the change in the total content of organic matter and its mobile components in alluvial dark humus soil when various doses of vermicompost were added to it at cultivating table beets. Fertilizer testing was carried out in a shallow field experiment. A reliable decrease in the content of mobile organic matter was found to be significant at a significance level of 99 and 95 % in variants with vermicomposting. After the interaction of soil with fertilizers, there was a natural increase in the average content of stable organic matter, according to the dose applied. The proportion of stable humus carbon increased greatly with a maximum dose of vermicom-post in the soil - 5 t/hectare. The introduction of vermicompost in Krasnoyarsk forest-steppe under conditions of moisture deficiency helped to stabilize humus state of alluvial dark humus soil and played a positive role in maintaining carbon balance.