Combined application of organic manure and chemical fertilizers stabilizes soil N-cycling microflora
文献类型： 外文期刊
作者： Sun, Ruibo 1 ; Wang, Daozhong 3 ; Guo, Zhibin 3 ; Hua, Keke 3 ; Guo, Xisheng 3 ; Chen, Yan 1 ; Liu, Binbin 4 ; Chu, Haiyan 1 ;
作者机构： 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, 71 East Beijing Rd, Nanjing 210008, Peoples R China
2.Anhui Agr Univ, Coll Resources & Environm, Anhui Prov Key Lab Farmland Ecol Conservat & Pollu, Key Lab JiangHuai Arable Land Resources Protect &, 130 Changjiangxilu, Hefei 230036, Peoples R China
3.Anhui Acad Agr Sci, Soil & Fertilizer Res Inst, 40 South Nongke Rd, Hefei 230031, Peoples R China
4.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Key Lab Agr Water Resources,Hebei Key Lab Soil Eco, 286 Huaizhong Rd, Shijiazhuang 050021, Peoples R China
关键词： microbial nitrogen cycle; metagenomics; long-term fertilization; soil acidification; manure
期刊名称：SOIL ECOLOGY LETTERS （ 影响因子：4.0； 五年影响因子：4.1 ）
ISSN： 2662-2289
年卷期： 2023 年 5 卷 3 期
页码：
收录情况： SCI
摘要： ? The abundance of N-cycling genes differently responded to NPK application.? Chemical NPK application greatly altered the N-cycling microbial community structure.? Soil acidification was the main driver for the variation in the N-cycling microbial community.? Manure addition was beneficial for stabilizing the N-cycling microbial community.Straw and manure are widely applied to agricultural systems, and greatly shape soil N-cycling microflora. However, we still lack a comprehensive understanding of how these organic materials struc-ture soil N-cycling microbial communities. In this study, metagenomic analysis was performed to investigate the compositional variation in N-cycling microbial communities in a 30-year long-term experiment under five fertilization regimes: no fertilization (Control), chemical fertilization only (NPK), and NPK with wheat straw (NPK + HS), pig manure (NPK + PM), and cow manure (NPK + CM). Long-term NPK application differentially changed N-cycling gene abundance and greatly altered N-cycling microbial community structure. NPK + HS resulted in a similar pattern to NPK in terms of gene abundance and community structure. However, NPK + PM and NPK + CM significantly increased most genes and resulted in a community similar to that of the Control. Further analysis revealed that serious soil acidification caused by long-term NPK fertilization was a major factor for the variation in N-cycling microbial communities. The addition of alkaline manure, rather than wheat straw, stabilized the N-cycling microbial community structure presumably by alleviating soil acidification. These results revealed the strong impact of soil acidification on microbial N-cycling communities and illustrated the possibility of resolving nitrogen-related environmental problems by manipulating pH in acidified agricultural soils.
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