Co-incorporation of green manure and rice straw improves rice production, soil chemical, biochemical and microbiological properties in a typical paddy field in southern China
文献类型： 外文期刊
作者： Zhou, Guopeng 1 ; Gao, Songjuan 3 ; Lu, Yanhong 4 ; Liao, Yulin 4 ; Nie, Jun 4 ; Cao, Weidong 1 ;
作者机构： 1.Chinese Acad Agr Sci, Minist Agr & Rural Affairs, Key Lab Plant Nutr & Fertilizer, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
2.Chinese Acad Agr Sci, Grad Sch, Beijing 100081, Peoples R China
3.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China
4.Hunan Acad Agr Sci, Soil & Fertilizer Inst Hunan Prov, Changsha 410125, Peoples R China
5.Minist Agr & Rural Affairs, Sci Observing & Expt Stn Arable Land Conservat Hu, Changsha 410125, Peoples R China
关键词： Cultivation of green manure; Rice straw return; Rice productivity; PLFAs; Soil enzymes
期刊名称：SOIL & TILLAGE RESEARCH （ 影响因子：5.374； 五年影响因子：6.368 ）
ISSN： 0167-1987
年卷期： 2020 年 197 卷
页码：
收录情况： SCI
摘要： The cultivation of green manure or rice straw returns in southern China increases crop yields and soil fertility. Few studies have reported the effects of combining both management techniques on rice performance and soil fertility. A 3-year field study was carried out to analyse the impacts of the co-incorporation practice on soil microbial and biochemical parameters as well as crop yield. Five treatments were tested: (i) no-fertilizer (CK); (ii) chemical fertilizer (F); (iii) F plus green manure (FM); (iv) F plus rice straw (FS); (v) F plus green manure plus rice straw (FMS). The results showed that incorporation of green manure and/or rice straw increased double rice yields by 4.1% (FM), 4.7% (FS) and 9.6% (FMS) compared with F. The FMS treatment enhanced soil organic C (SOC), total N (TN), mineral N (N-min), and available K (AK) levels by combining the advantage of FM in increasing TN and N-min and the advantage of FS in increasing SOC and AK in comparison with F. The incorporation of green manure and/or rice straw stimulated microbial growth (total phospholipid fatty acids, PLFAs) and altered the soil microbial community structure relative to F, in which FMS had the greatest effect. The enzyme activities of beta-glucosidase, beta-cellobiosidase, N-acetyl-glucosaminidase, L-leucine aminopeptidase and phosphatase were higher in the green manure and/or rice straw application treatments than in the F treatment in the order FM approximate to FS < FMS. The partial least squares path model (PLS-PM) analysis indicated that green manure mainly influenced the abovementioned indices in the early rice season, while the effects of rice straw lasted until the late rice season. Our results suggest that co-incorporation of green manure and rice straw is a more effective practice for improving soil fertility and rice yields.
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