[Response Characteristics of Soil Microbial Community Under Long-term Film Mulching].

Zhi-E Hu, Mou-Liang Xiao, Ji-Na Ding, Jian-Hong Ji, Jian-Ping Chen, Ti-da Ge, Shun-Bao Lu
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引用次数: 5

Abstract

Film mulching is an important practice to increase the yield and income in agricultural production. Soil samples were collected from four farmland sites with different mulching years to reveal the effect of long-term plastic mulching on characteristics of soil microbial community structure. In order to explore the long-term effect of soil microbial community change and its effect on the microbial ecological environment, high-throughput sequencing technology was used to analyze the changes in soil bacterial and fungal community structure. The results showed that long-term film mulching had no significant effect on soil bacterial diversity but decreased fungal diversity. Long-term film mulching decreased the abundance of Acidobacteriota and Mortierellomycetes and increased the abundance of Actinobacteriota. Long-term film mulching enriched the beneficial microbial communities such as Bacillus, Nocardioidaceae, Aspergillus, and Hypocreales in soil. However, long-term film mulching indued a simple and fragile soil fungal co-occurrence network pattern. The unidentified Sordariales under Ascomycota was the only key species in the fungal co-occurrence network, which resulted in potential risks to the ecological environment of the farmland soil. This study provided a theoretical basis for further understanding the effects of long-term film mulching on the ecological and environmental effects of microorganisms in farmland.

长期地膜覆盖对土壤微生物群落的响应特征
地膜覆盖是农业增产增收的一项重要措施。为揭示长期地膜覆盖对土壤微生物群落结构特征的影响,在不同覆盖年限的4个农田样地采集土壤样品。为了探索土壤微生物群落变化的长期影响及其对微生物生态环境的影响,采用高通量测序技术分析土壤细菌和真菌群落结构的变化。结果表明,长期地膜覆盖对土壤细菌多样性无显著影响,但真菌多样性降低。长期地膜覆盖降低了酸性菌群和腐肉菌群的丰度,增加了放线菌群的丰度。长期地膜覆盖丰富了土壤中有益微生物群落,如芽孢杆菌、诺卡菌科、曲霉、次creales等。而长期地膜覆盖导致土壤真菌共生网络格局简单脆弱。子囊菌纲下未识别的Sordariales是真菌共生网络中唯一的关键种,对农田土壤生态环境存在潜在风险。本研究为进一步了解长期地膜覆盖对农田微生物生态环境效应的影响提供了理论依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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