文献类型： 外文期刊

作者： Zhou, Guopeng ¹ ; Chang, Danna ¹ ; Gao, Songjuan ² ; Liang, Ting ¹ ; Liu, Rui ³ ; Cao, Weidong ¹ ;

作者机构： 1.Chinese Acad Agr Sci, Minist Agr & Rural Affairs, Inst Agr Resources & Reg Planning, Key Lab Plant Nutr & Fertilizer, Beijing 100081, Peoples R China

2.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China

3.Qinghai Univ, Qinghai Acad Agr & Forestry Sci, Grad Sch, Inst Soil & Fertilizer, Xining 810016, Peoples R China

关键词： Rice straw; Chinese milk vetch; Mixed residues; Enzyme activity; Microorganisms; Paddy soil

期刊名称：BIOLOGY AND FERTILITY OF SOILS （ 影响因子：6.432； 五年影响因子：6.332 ）

ISSN： 0178-2762

年卷期： 2021 年 57 卷 4 期

页码：

收录情况： SCI

摘要： Rice straw (RS) was incorporated into paddy soil together with leguminous green manure (e.g., Chinese milk vetch, Astragalus sinicus L., MV) in a mesocosm-scale experiment and the enzyme activity and composition of main microbial groups were measured. Mixing MV and RS caused a synergistic release of residual C and N, leading to a low C/N ratio at the middle and late decomposition stages of the mixture and shortening the time to complete decomposition. Furthermore, the highest abundances of Gram-negative (G(-)) bacteria and fungi and the highest activities of alpha- and beta-glucosidase, beta-cellobiosidase, beta-xylosidase, N-acetyl-glucosaminidase, and acid phosphomonoesterase were observed in the residue mixture, especially at the middle and late stages of the experiment. The residue decomposition rate was positively correlated with residual N and mineral N concentrations. Most hydrolases and both oxidase (phenol oxidase and peroxidase) activities, and G(-) bacterial (especially 18:1 omega 5c, Photobacterium) abundance explained the decomposition of mixing residues. In conclusion, co-incorporation of MV and RS could stimulate their decomposition by retaining a relatively low C/N ratio, enhancing G(-) bacterial abundance and hydrolase activities. Introducing leguminous green manures in paddy fields may be an effective way to accelerate the decomposition of rice straw.