CHANGES IN THE CONTENT AND QUALITY OF HUMUS IN CHERNOZEM PODZOLIZED AFTER THE INTRODUCTION OF MANURE AND COMPOST ON ITS BASIS

Abstract

The application of manure and compost based on it contributed to an increase in the carbon content. On control (without fertilization), the carbon content was 1.7 %. After the application of manure, compost (litter + straw) and compost (litter + husk) at a dose of 10 tons per ha, the carbon content was 1.80, 1.83 and 1.90 % respectively. The use of manure and compost on its basis had an impact on the qualitative composition of humus. On the control, the ratio of HA / FA was 1.25, which indicates a fulvate-humate type of humus. After the introduction of organic fertilizers, the quality of humus was improved by HA / FA 1.47 ... 1.79. High efficiency of action and aftereffect on the qualitative and quantitative composition of humus of chernozem podzo-lized has compost (litter + husk). Action and aftereffect of compost (litter + husk). Contributed to an increase in the content of fractions of HA and humans due to a decrease in the fraction of FA fractions, shifting the type of humus formation from fulvate to humate, while enhancing the degree of humification of organic matter. Along with the increase in humicity and saturation with hardly soluble fractions of humus, the compost application (litter + husk) provided the maximum content of mobile forms of humic acids available for plant nutrition, significantly increasing the agronomic value of humus of podzolized chernozem, increasing its ability to withstand adverse effects.