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Organic manure rather than phosphorus fertilization primarily determined asymbiotic nitrogen fixation rate and the stability of diazotrophic community in an upland red soil
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Shi, Wei, Zhao, Hui-Yu, Chen, Yin, Wang, Jin-Song, Han, Bing, Li, Cong-Ping, Lu, Jun-Yuan and Zhang, Li-Mei (2021) Organic manure rather than phosphorus fertilization primarily determined asymbiotic nitrogen fixation rate and the stability of diazotrophic community in an upland red soil. Agriculture, Ecosystems & Environment, 319 . 107535. doi:10.1016/j.agee.2021.107535 ISSN 0167-8809.
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WRAP-Organic-manure-phosphorus-fertilization-primarily-asymbiotic-nitrogen-red-soil-2021.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (2729Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.agee.2021.107535
Abstract
Biological nitrogen fixation (BNF) plays a vital role in nitrogen supply in agricultural ecosystem but is generally impaired by agricultural fertilization. Understanding the trade-off between fertilization and BNF, and the underlying mechanisms are essential to optimize fertilization management for sustainable agriculture production. In this study, we examined the potential rate of asymbiotic N2 fixation, nifH gene abundance, the composition and co-occurrence network of diazotrophic community in an acidic red soil received different organic and inorganic fertilization regimes for more than 40 years. Our results showed that long-term chemical fertilizer application drastically decreased soil microbial biomass, nitrogenase activity and nifH gene abundance in comparison to the unfertilized control. Organic manure application showed significantly positive effect on soil nitrogenase activity and crop yield via regulating soil pH and the key ecological cluster of diazotrophic community (module #2 which was mainly represented by Bradyrhizobium, Pseudacidovorax and Azospirillum), while phosphorus fertilization showed no obvious promotion effect. Organic manure amendment significantly increased the diversity of diazotrophs and enriched some diazotrophic taxa, particularly Pseudacidovorax and Rhodopseudomonas which were likely responsible for the high N2-fixation potential. The control and organic manure amendment treatments possessed a more complex and stable diazotrophic network than the chemical fertilizer treatments did, which greatly facilitated the resistance of diazotrophic community to environmental stress and thus sustained a high N2 fixation potential. Together, our study demonstrated that organic manure application can effectively alleviate the inhibitory effect of nitrogen fertilization on N2 fixation via regulating soil property and shaping a more stable diazotrophic network.
| Item Type: | Journal Article | |||||||||||||||
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| Subjects: | Q Science > QR Microbiology S Agriculture > S Agriculture (General) |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | |||||||||||||||
| Library of Congress Subject Headings (LCSH): | Organic fertilizers , Farm manure, Nitrogen -- Fixation, Acid soils , Crop improvement | |||||||||||||||
| Journal or Publication Title: | Agriculture, Ecosystems & Environment | |||||||||||||||
| Publisher: | Elsevier BV | |||||||||||||||
| ISSN: | 0167-8809 | |||||||||||||||
| Official Date: | 1 October 2021 | |||||||||||||||
| Dates: |
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| Volume: | 319 | |||||||||||||||
| Article Number: | 107535 | |||||||||||||||
| DOI: | 10.1016/j.agee.2021.107535 | |||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||
| Publication Status: | Published | |||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
| Date of first compliant deposit: | 17 June 2021 | |||||||||||||||
| Date of first compliant Open Access: | 16 May 2022 | |||||||||||||||
| RIOXX Funder/Project Grant: |
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