Responses of soil diazotrophic diversity and community composition of nodulating and non-nodulating peanuts (Arachis hypogaea L.) to nitrogen fertilization

Influencing mechanism of nitrogen (N) fertilization on soil diazotrophs of legumes remains unclear. Further study on the effect of different nitrogen application rates on soil nitrogen-fixing is of critical importance for high-efficiency nitrogen application of peanut field and agricultural sustaina...

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Published inZuo wu xue bao Vol. 48; no. 10; p. 2575
Main Authors Sun, Qi-Qi, Zheng, Yong-Mei, Yu, Tian-Yi, Wu, Yue, Yang, Ji-Shun, Wu, Zheng-Feng, Wu, Ju-Xiang, Li, Shang-Xia
Format Journal Article
LanguageChinese
Published Beijing Chinese Academy of Agricultural Sciences (CAAS) 01.01.2022
Subjects
Agricultural production
Arachis hypogaea
Bacteria
Carbon
Community composition
Composition
Dissolved organic carbon
Fertilization
Fertilizers
Gene sequencing
Legumes
Microorganisms
Next-generation sequencing
NifH gene
Nitrogen
Nitrogen fixation
Nitrogen sources
Nitrogen-fixing bacteria
Nitrogenation
Nodules
Nuts
Peanuts
Proteobacteria
Soil analysis
Soil bacteria
Soil fertility
Soil microorganisms
Soils
Sustainability
Sustainable agriculture
Sustainable development
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Summary:Influencing mechanism of nitrogen (N) fertilization on soil diazotrophs of legumes remains unclear. Further study on the effect of different nitrogen application rates on soil nitrogen-fixing is of critical importance for high-efficiency nitrogen application of peanut field and agricultural sustainability development. We used the non-nodulating (BL) and nodulating (Huayu 22, HY22) peanuts as experimental materials, with four N application rates arranged, including N0 (without N application, 0 kg hm-2), N60 (N reduced-application, 60 kg hm-2), N120 (N common-fertilization, 120 kg hm-2), and N180 (N over-application, 180 kg hm-2). The qRT-PCR and Illumina high-throughput sequencing of nifH gene were used to analyze soil diazotrophic abundance, diversity, and community composition. Results showed that: (1) N fertilization significantly increased the contents of soil N fraction. Especially at N120, the soil microbial biomass carbon and dissolved organic carbon of nodulating peanut were significantly higher than t
ISSN:0496-3490
DOI:10.3724/SP.J.1006.2022.14174