Journal of Integrative Agriculture ›› 2024, Vol. 23 ›› Issue (6): 2099-2111.DOI: 10.1016/j.jia.2023.11.050

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不同覆盖作物种植下微生物群落特征对旱地红壤多功能性的调控

  

  • 收稿日期:2023-07-11 接受日期:2023-11-17 出版日期:2024-06-20 发布日期:2024-05-30

Characteristics of the microbial communities regulate soil multi-functionality under different cover crop amendments in Ultisol

Guilong Li1, 2, Xiaofen Chen1, 2, Wenjing Qin1, 2, Jingrui Chen1, 2, Ke Leng1, 2, Luyuan Sun1, 2, Ming Liu3, Meng Wu3, Jianbo Fan3, Changxu Xu1, 2, Jia Liu1, 2#   

  1. 1 Soil and Fertilizer & Resources and Environment Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China

    2 Key Laboratory of Acidified Soil Amelioration and Utilization, Ministry of Agriculture and Rural Affairs, Nanchang 330200, China

    3 Ecological Experimental Station of Red Soil, Chinese Academy of Sciences, Yingtan 335211, China

  • Received:2023-07-11 Accepted:2023-11-17 Online:2024-06-20 Published:2024-05-30
  • About author:Guilong Li, Mobile: +86-13455171603, E-mail: glli@jxaas.cn; #Correspondence Jia Liu, Tel: +86-791-87090375, E-mail: liujia422@126.com
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (2021YFD1901201-05), the China Agriculture Research System of MOF and MARA (CARS-22), the Special Program for Basic Research and Talent Training of Jiangxi Academy of Agricultural Sciences, China (JXSNKYJCRC202301 and JXSNKYJCRC202325), and the National Natural Science Foundation of China (32160766).

摘要:

覆盖作物是调控土壤微生物群落的一种可持续措施,而土壤微生物群落对于多种土壤功能(即土壤多功能性)的实现至关重要。然而,在不同覆盖作物种植条件下,关于土壤微生物群落在调节土壤多功能性中的作用知之甚少。基于此,本研究评估了不同覆盖作物种植条件下(CK,冬闲;RD,肥田萝卜单播;HV,毛叶苕子单播;RDHV,肥田萝卜-毛叶苕子混播)土壤多功能性的变化;研究了土壤微生物丰富度、网络复杂度和生态集群对土壤多功能性的贡献。结果表明,与主作物植株化学性质差异较大的覆盖作物具有更高的土壤多功能性,且肥田萝卜-毛叶苕子混播下土壤多功能性最高。覆盖作物驱动的土壤微生物丰富度和网络复杂性的变化与土壤多功能性的提高有关。值得注意的是,土壤微生物网络中关键生态集群(生态集群2)中的特定微生物对于维持土壤的多功能性尤为重要。本研究结果强调了覆盖作物诱导的重要功能分类群的变化对于提升旱地红壤多功能性的重要性。

Abstract:

The use of cover crops is a promising strategy for influencing the soil microbial consortium, which is essential for the delivery of multiple soil functions (i.e., soil multifunctionality).  Nonetheless, relatively little is known about the role of the soil microbial consortium in mediating soil multifunctionality under different cover crop amendments in dryland Ultisols.  Here, we assessed the multifunctionality of soils subjected to four cover crop amendments (control, non-amended treatment; RD, radish monoculture; HV, hairy vetch monoculture; and RDHV, radish–hairy vetch mixture), and we investigated the contributions of soil microbial richness, network complexity, and ecological clusters to soil multifunctionality.  Our results demonstrated that cover crops whose chemical composition differed from that of the main plant crop promoted higher multifunctionality, and the radish–hairy vetch mixture rendered the highest enhancement.  We obtained evidence that changes in soil microbial richness and network complexity triggered by the cover crops were associated with higher soil multifunctionality.  Specifically, specialized microbes in a key ecological cluster (ecological cluster 2) of the soil microbial network were particularly important for maintaining soil multifunctionality.  Our results highlight the importance of cover crop-induced variations in functionally important taxa for promoting the soil multifunctionality of dryland Ultisols.

Key words: cover crops , soil multifunctionality , microbial richness , network complexity , ecological cluster