Effects of Chemical Fertilizer and Straw-decomposing Microbial Inoculant Application on Soil Nutrients of Paddy Soil and Rice Yield under Straw Returning
To clarify the effects of chemical fertilizer and straw-decomposing microbial inoculant(SDMI)on soil nutrients and crop yield in the context of straw returning,a stationary field experiment was conducted in the Huoqiu region of Anhui province,China.This study investigated a wheat-rice crop rotation system under four treatments:straw alone(S),straw with chemical fertilizer(SF),straw with SDMI(SD),and straw with chemical fertilizer and SDMI(SFD).The results showed that compared with the control treatment(S),treatment SFD significantly increased soil total organic C,labile organic C,CPI,available P,available K,and rice yield by 38.12％,38.47％,40.63％,55.38％,24.73％,and 439.44％,respectively(P＜0.05).Furthermore,there was a significant positive correlation(P＜0.05)between rice yield and labile organic carbon,available nitrogen,and available phosphorus,as well as a highly significant positive correlation(P＜0.01)between rice yield and total organic carbon and available potassium.These findings suggest that SDMI is a crucial factor in en-hancing soil nutrient levels and increasing rice yield.The effectiveness of SDMI in promoting decay is fully real-ized only when combined with chemical fertilizers.Therefore,the application of chemical fertilizers and SDMI is recommended to maximize soil fertility improvement and rice yield enhancement.
Straw-decomposing microbial inoculantChemical fertilizerSoil organic carbonRice yieldHuaihe River region
NETL
NSTL
万方数据
