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聚乙烯微塑料改变土壤微生物社区组合和生态系统多功能性.

Ziqiang Liu1, Jiahao Wen1, Zhenxiu Liu1

  • 1Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou 510642, China; Department of Ecology, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.

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土壤中的微塑料 (MP) 影响微生物群落和生态系统功能. 虽然低度 (1%) 可以提高多功能性,但高度 (5%) 损害土壤健康,减少整体生态系统的好处.

关键词:
碳循环是碳循环的过程.微生物社区的组装.微塑料是一种微塑料.气循环是指气循环的过程.的循环循环活动土壤多功能性的土壤多功能性

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科学领域:

  • 环境科学 环境科学
  • 土壤科学 土壤科学
  • 生态毒理学 生态毒理学

背景情况:

  • 微塑料 (MP) 污染在陆地生态系统中是一个日益严重的全球问题.
  • 国会议员对土壤微生物社区组合和生态系统多功能性的影响尚不清楚.

研究的目的:

  • 研究聚乙烯MPs (PE MPs) 对玉米土壤系统中的土壤功能,微生物群落和生态系统多功能性的影响.
  • 确定PE MPs对植物生产,土壤质量,酶活动和微生物群落聚集的剂量依赖性影响.

主要方法:

  • 进行了一个中宇宙实验,使用不同度的PE MPs (0%,1%和5% w/w).
  • 评估了植物生物质,土壤的物理化学特性 (水,pH,C,P),酶活动 (C,N,P循环),微生物群落的多样性和组合,以及生态系统的多功能性.

主要成果:

  • PE MP对植物生物质的影响微不足道,但改变了土壤特性,5%的PE MP降低了土壤水和P的可用性,同时增加了pH和C的储存.
  • 酶活性有所不同,一些C循环酶在1%的PE MP中被促进,在5%的PE MP中被抑制,而N循环酶被减少,P循环酶在5%的PE MP中被增强.
  • 5%的PE MP改变了微生物群落的组成,增加了专门物种,增强了稳定性和耐药性,并通过减少分散限制改变了社区组合.

结论:

  • PE MP 显著改变土壤微生物群落组合和生态系统多功能性,以度依赖的方式.
  • 低PE MP度 (1%) 提高了生态系统的多功能性,而高度 (5%) 降低了它.
  • 控制土壤PM污染对可持续农业至关重要,酶活动和土壤-N含量是多功能性的关键指标.