Microbial Succession in Organic Matter Transformation

摘要

Microbiological transformation of organic matter with different C:N ratios was studied on experimental small plots(1 m~2),which were fertilized by some organic fertilizers(peat,straw,manure,and green manure crop)at different doses and using different methods of their application.The experiment with annual application of fresh organic matter showed that microbial successions were not accomplished,and the rate of organic matter transformation depended on its C:N ratio.The annual application of peat,manure,and straw(8-16 t/ha)led to humus accumulation in the soil.A green manure crop was mineralized during the vegetative period without humus formation.The single application of organic fertilizers at a dose of 40-80 t/ha promoted the stable development of microbiological processes and mineralization of organic matter.In this case,the rate of humus accumulation was low.