| This paper studied the application effects of straw returning to soil and decomposing inoculant in cold
waterlogged field by observing the apparent properties after straw returning and determining straw tension rupture, soil
fertility, soil physical and chemical properties and soil microorganisms. The results showed that straw returning or straw
returning + a small quantity of decomposing inoculant could made the content of alkali-hydrolyzable nitrogen, organic
matter, water-soluble carbon, soil microorganisms and microbial biomass carbon increased, however, it had little effect
on the grain yield of rice. Straw returning to soil with straw decomposing inoculant could accelerate decomposition
process of straw, made the microbial biomass, water-soluble carbon and microbial carbon increased, compared with no
decomposing inoculant. When the decomposing inoculate was 4kg/667m2, the decomposition process speeded up, the
straw tensile force were 17.8 N and 22.2 N at 4th day and 7th day, lower than that of others, and the grain yield of rice
increased by 10.1%, the soil microbial carbon and antinomycetes increased too, the effect was significant. |
