THE INFLUENCE OF REGULAR INTRODUCTION OF LIQUID MANURE OF CATTLE AND PIG MANURE EFFLUENTS ON INDICATORS OF HUMUS CONDITION OF SOD-PODZOLIC SOILS

Abstract

The data on the influence of systematic exposure of liquid manure of cattle and pig manure effluents on the indicators of humus state of sod-podzolic soils are presented. After 20-30 years the soils near of livestock complexes was established a positive trend in the change of humus state: the relative content of HA-2 increased by 3,1-5,7 %, the share of HA-2 in the sum of humic acids - by 9-22 %; the degree of humification of organic matter - by 6,7-8,4 % with the expansion of C_HA/C_FA - up to 0,70-1,00, C_HA-2/C_FA-2 - to 0,80-2,27 and a decrease in the indicator I_lab. - by 9-23 %, which indicated the stabilization of the humus complex and the strengthening of the sign of humateness of soils. When the period of application of liquid manure of cattle and pig manure effluents up to 10 years, signs of degradation changes in the composition of humus were revealed: the relative content of HA-2 decreased to 3,5-4,5 % of the C_tot., the share of HA-2 in the amount of humic acids - up to 22-26 %, the ratio of C_HA/C_FA - to 0,48-0,54, C_HA-2/C_FA-2 - 0,70-0,81, I_lab. increased in 1,5-2,0 times that testified to fulvate orientation of process of humus formation.