首页|Combined application of organic manure and chemical fertilizers stabilizes soil N-cycling microflora

Combined application of organic manure and chemical fertilizers stabilizes soil N-cycling microflora

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·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 micro-bial 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.

microbial nitrogen cyclemetagenomicslong-term fertilizationsoil acidificationmanure

Ruibo Sun、Daozhong Wang、Zhibin Guo、Keke Hua、Xisheng Guo、Yan Chen、Binbin Liu、Haiyan Chu

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State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,71 East Beijing Road,Nanjing 210008,China

Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention,Key Laboratory of JiangHuai Arable Land Resources Protection and Eco-Restoration,College of Resources and Environment,Anhui Agricultural University,130 Changjiangxilu,Hefei 230036,China

Soil and Fertilizer Research Institute,Anhui Academy of Agricultural Sciences,40 South Nongke Road,Hefei 230031,China

Key Laboratory of Agricultural Water Resources,Hebei Key Laboratory of Soil Ecology,Center for Agricultural Resources Research,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,286 Huaizhong Road,Shijiazhuang 050021,China

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Strategic Priority Research Program of the Chinese Academy of SciencesNational Key R&D Program of China

XDB400202042021YFF1000403.

2023

10.1007/s42832-022-0165-z

土壤生态学快报(英文)

土壤生态学快报(英文)

CSCD
ISSN：
年,卷(期)：2023.5(3)
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