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ORIGINAL RESEARCH article

Front. For. Glob. Change
Sec. Forest Soils
Volume 7 - 2024 | doi: 10.3389/ffgc.2024.1411297

Effects of mulching and flooding on soil nutrients and bacterial community structure under Phyllostachys praecox

Provisionally accepted
Jianshuang Gao Jianshuang Gao 1,2Chaofeng Yang Chaofeng Yang 3,4Shunyao Zhuang Shunyao Zhuang 5,6*Renyi Gui Renyi Gui 4
  • 1 Hunan University of Finance and Economics, Changsha, Hunan, China
  • 2 Other, Changsha, China
  • 3 Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang Province, China
  • 4 State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang Agriculture & Forestry University, Hangzhou, Jiangsu Province, China
  • 5 Institute of Soil Science, Chinese Academy of Sciences (CAS), Nanjing, China
  • 6 State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences (CAS), Nanjing, Jiangsu Province, China

The final, formatted version of the article will be published soon.

    Phyllostachys praecox is a shallow-rooted bamboo that often encounters hypoxia conditions which could be induced by long-term organic material mulching or flooding. It is important to uncover the effect of mulching and flooding on soil nutrient, ammonia-oxidizing microbes, and bacterial diversity. We set up field pot experiments with three treatments (control, mulching, and flooding) under P. praecox. Mulching or flooding altered soil conditions significantly, and both increased ammonium-nitrogen (NH4 + -N), total phosphorus (TP), available P (AP), and available potassium (AK) concentrations, and decreased oxygen (O2) concentrations over control. Flooding increased pH and decreased nitrate-nitrogen (NO3 --N), while mulching decreased soil pH and NO3 --N. As O2 content decreased, archaeal 16S rRNA, amoA gene copies of ammonia-oxidizing archaea (AOA) and ammonia oxidizing bacteria (AOB) increased. Mulching and flooding decreased Shannon, ACE and Chao 1 diversity when compared with the control, and as the O2 contents decreased, bacterial diversity decreased. Redundancy Analysis revealed O2, NO3 --N, AK, AP, and pH were the major factors driving bacterial community structure. Correlation Analysis showed AK and O2 contents were highly correlated with bacterial community structure. In addition, structural equation modeling indicated that O2 facilitated efficient soil N use mainly through soil pH, AK content, and bacterial diversity. Mulching or flooding exerted great effects on environment factor and bacterial community structure, which could be exploited to facilitate the regulation of soil O2 conditions for sustainable P. praecox production.

    Keywords: hypoxia, flooding, Bamboo, bacterial community, Nitrate nitrogen, Organic mulch

    Received: 02 Apr 2024; Accepted: 02 Jul 2024.

    Copyright: © 2024 Gao, Yang, Zhuang and Gui. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Shunyao Zhuang, Institute of Soil Science, Chinese Academy of Sciences (CAS), Nanjing, China

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