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Effect of biogas slurry addition on soil properties, yields, and bacterial composition in the rice-rape rotation ecosystem over 3 years

机译:3年间添加沼液对水稻-油菜轮作生态系统中土壤特性,产量和细菌组成的影响

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摘要

Purpose: Organic treatments may improve soil nutrient availability and ecological functions. This study aimed to determine the effect of biogas slurry (BS) on soil properties, yields, and bacterial community activity and to examine the main environmental factors impacting bacterial compositions in the ecosystem.Materials and methods: A 3-year field experiment was conducted in yellow soil under a rice-rape rotation to understand the effect of BS originating from anaerobically digested pig waste on soil chemical and bacterial compositions.Results and discussion: Compared with an inorganic nutrient treatment and a control, adding BS at a moderate dose (BS6, 165.1 t ha(-1)) positively affected the rice and rape yields, soil fertility, and bacterial diversity. The BS was more suitable than chemical fertilizer for maintaining agricultural soil sustainability, especially the BS6 and BS7 treatments (165.1 and 182.1 t ha(-1), respectively), by improving nutrient content, increasing soil pH, and promoting soil crumb structure formation. The relative abundance of Actinobacteria in BS6 was decreased by 37.9% compared with the untreated soil and 27.7% compared with the fertilizer treatment, while the relative abundance of Nitrospirae in BS6 increased by 41.2% and 43.5% compared with these treatments, respectively. Redundancy analyses (RDA) showed that pH, rape yield, cation exchange capacity (CEC), and total nitrogen (TN) were significantly correlated with soil bacterial community composition and explained 56.0%, 46.4%, 43.2%, and 34.9% of the total community variability, respectively. The soil bacterial diversity depended mainly on soil pH, and crop rotation played an important role in changing the bacterial community.Conclusions: The soil bacterial composition was clearly altered after 3 years of BS treatments. These increases in bacterial diversity could be of ecological significance in maintaining soil fertility and functionality.
机译:目的:有机处理可以改善土壤养分的利用率和生态功能。这项研究旨在确定沼液对土壤特性,产量和细菌群落活性的影响,并研究影响生态系统中细菌组成的主要环境因素。材料和方法:在该实验室进行了3年的田间试验在水稻-油菜轮作下的黄色土壤中了解厌氧消化的猪粪废物中的BS对土壤化学和细菌成分的影响。结果与讨论:与无机营养处理和对照相比,以中等剂量添加BS(BS6, 165.1 t ha(-1))对水稻和油菜产量,土壤肥力和细菌多样性产生积极影响。通过提高养分含量,增加土壤pH值和促进土壤屑结构的形成,BS比化学肥料更适合保持农业土壤的可持续性,尤其是BS6和BS7处理(分别为165.1和182.1 t ha(-1))。与未处理的土壤相比,BS6中放线菌的相对丰度降低了37.9%,与肥料处理相比,放线菌的相对丰度降低了27.7%,而与这些处理相比,BS6中的硝化螺菌的相对丰度分别提高了41.2%和43.5%。冗余分析(RDA)显示,pH,油菜产量,阳离子交换能力(CEC)和总氮(TN)与土壤细菌群落组成显着相关,分别占总数的56.0%,46.4%,43.2%和34.9%社区变异性。土壤细菌的多样性主要取决于土壤的pH值,轮作在改变细菌群落中起着重要的作用。结论:BS处理3年后,土壤细菌组成发生了明显变化。细菌多样性的这些增加对维持土壤肥力和功能具有生态学意义。

著录项

  • 来源
    《Journal of soil & sediments》 |2019年第5期|2534-2542|共9页
  • 作者单位

    Sichuan Agr Univ, Coll Environm sci, Chengdu 611130, Sichuan, Peoples R China;

    Sichuan Agr Univ, Coll Environm sci, Chengdu 611130, Sichuan, Peoples R China;

    Sichuan Agr Univ, Coll Environm sci, Chengdu 611130, Sichuan, Peoples R China;

    Sichuan Agr Univ, Coll Resource Sci & Technol, Dept Microbiol, Chengdu 611130, Sichuan, Peoples R China;

    Sichuan Agr Univ, Coll Environm sci, Chengdu 611130, Sichuan, Peoples R China;

    Sichuan Agr Univ, Coll Environm sci, Chengdu 611130, Sichuan, Peoples R China;

    Sichuan Agr Univ, Coll Environm sci, Chengdu 611130, Sichuan, Peoples R China;

    Sichuan Agr Univ, Coll Environm sci, Chengdu 611130, Sichuan, Peoples R China;

    Sichuan Agr Univ, Coll Environm sci, Chengdu 611130, Sichuan, Peoples R China;

    Sichuan Agr Univ, Coll Environm sci, Chengdu 611130, Sichuan, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bacterial composition; Biogas slurry; Pig waste; Rice-rape rotation;

    机译:细菌组成;沼液;猪粪;稻菜轮作;
  • 入库时间 2022-08-18 04:24:21

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