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Investigating the effects of various irrigation methods on bacterial communities in paddy soil

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  • Lin, Yaoben
  • Sun, Xinyu
  • Li, Guangyu

Abstract

Different irrigation methods can impact the micro-ecological environment of paddy soil, affecting crop growth. This study focuses on County A, a key grain production area on China’s East Coast, where 20 plots each of intermittent and flood irrigation were selected and labeled as Group I and Group F, respectively. Soil's basic physicochemical properties and heavy metal content were measured in the laboratory, and high-throughput sequencing was used to analyze soil bacterial communities. The study evaluated the impact mechanisms of different irrigation methods on these bacterial communities. Results indicate: (1) Intermittent irrigation significantly increased bacterial richness, evenness, and diversity, enhancing microbial community diversity and stability. (2) Intermittent irrigation notably raised the abundance of 9 bacterial genera (e.g., Nitrospira, H16) while reducing the abundance of 7 genera (e.g., Geobacter, Sphingomonas). (3) The soil environment in Group I was stable, with bacterial communities influenced by SMC, pH, and Cu; Group F was affected by multiple environmental factors. Intermittent irrigation provides a stable environment that supports bacterial diversity and abundance, contributing to a richer community structure. (4) Intermittent irrigation optimizes moisture, significantly enhancing bacterial functions such as energy production, cell wall biosynthesis, repair, and signal transduction. These findings suggest that intermittent irrigation improves bacterial community stability and diversity, which is crucial for enhancing the overall quality of paddy fields.

Suggested Citation

  • Lin, Yaoben & Sun, Xinyu & Li, Guangyu, 2024. "Investigating the effects of various irrigation methods on bacterial communities in paddy soil," Agricultural Water Management, Elsevier, vol. 306(C).
    • Handle: RePEc:eee:agiwat:v:306:y:2024:i:c:s0378377424004827
    DOI: 10.1016/j.agwat.2024.109146
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    References listed on IDEAS

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    1. Atsuya Ikemoto & So Kazama & Takeo Yoshida & Hayata Yanagihara, 2023. "Evaluation of an Adaptation Strategy for Flood Damage Mitigation Under Climate Change Through the Use of Irrigation Reservoirs in Japan," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 37(10), pages 4159-4175, August.
    2. Li, Guochun & Niu, Wenquan & Ma, Li & Du, Yadan & Zhang, Qian & Gan, Haicheng & Siddique, Kadambot H.M., 2024. "Effects of drip irrigation upper limits on rhizosphere soil bacterial communities, soil organic carbon, and wheat yield," Agricultural Water Management, Elsevier, vol. 293(C).
    3. Li, Zhaoyang & Li, Wenhao & Wang, Jiulong & Zhang, Jinzhu & Wang, Zhenhua, 2023. "Drip irrigation shapes the soil bacterial communities and enhances jujube yield by regulating the soil moisture content and nutrient levels," Agricultural Water Management, Elsevier, vol. 289(C).
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