Effects of different returning method combined with decomposer on decomposition of organic components of straw and soil fertility

Abstract In view of the problems low straw decomposition rates and reduced soil fertility in southern Liaoning, China, we investigated effects no-tillage mode (NT), deep loosening + rotary tillage (PT), (RT) addition decomposing agent (the next is called a decomposer) (NT S, PT RT S) on proportion straw, respectively, by using nylon net bag method combination with 365-day field plot experiments. The rules cellulose, hemicellulose lignin as well dynamics organic carbon (SOC), microbial biomass (MBC) dissolved (DOC) returned to for 15, 35, 55, 75, 95, 145 365 days were analyzed. results showed that short term, was better both rotray modes than mode, decomposer significantly promoted release from among them, S treatment had highest all sampling periods. After one year experimental cycle, 35.49%, 84.23% 85.50%, SOC, MBC DOC contents also higher other treatments an increase 2.30 g kg ?1 , 14.22 mg 25.10 compared pre-experimental soil. Our show accelerate rate content various forms soil, can be used return field, while spraying its surface. This experiment new rich variety microorganisms, combined comparison modes, in-depth study lignin. Thus, scheme effectively improve within period time explored provide theoretical support Liaoning.