不同秸秆还田方式对旱地红壤细菌多样性及群落结构的影响
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S154.36

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国家自然科学基金项目(41922048,41771297)和江苏省杰出青年基金项目(BK20180049)资助。


Effects of Different Types of Straw Returning on Bacterial Diversity and Community Structure in Dryland Red Soil
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    摘要:

    为明确不同秸秆还田方式下土壤细菌群落结构变化特征,以南方典型旱地红壤为研究对象,基于中国科学院鹰潭红壤生态实验站玉米单作系统不同秸秆还田方式的长期试验,利用高通量测序明确了不同秸秆还田方式对土壤细菌多样性及群落结构的影响。结果表明:①秸秆还田对土壤肥力提升显著,以秸秆猪粪配施(NPKSM)处理提升效果最佳;②常规化肥处理(NPK)对细菌多样性无显著影响,但秸秆还田(NPKS)、秸秆猪粪配施(NPKSM)以及生物质炭(NPKB)处理均显著提升土壤细菌多样性;③土壤有效磷和有机碳变化是影响细菌多样性指数的主要因素,而速效钾、pH、全磷以及全氮均显著驱动细菌群落结构变异。研究结果从培育红壤肥力和增加微生物多样性的角度,为农业生态系统生物功能和土壤健康的协同提升提供了科学依据。

    Abstract:

    The purpose of this study was to investigate the effects of different types of straw returning on the microbial community structure in a dryland red soil. The field experiment was conducted with different types of straw returning in corn mono-cropping system at the National Agro-Ecosystem Observation and Research Station in Yingtan. The sequencing of 16S rRNA gene was used to investigate the effects of different types of straw returning on the diversity and structure of soil bacteria community. The results showed that:1) the straw returning treatments (NPKS, NPKSM and NPKB) significantly promoted soil fertility, with the highest effects under the NPKSM treatment (straw plus pig manure); 2) the straw returning treatments significantly increased the bacterial diversity compared to the chemical fertilization treatment; and 3) soil available phosphorus and organic carbon were the two most important predictors of the bacterial diversity, while available potassium, pH, total phosphorus and total nitrogen were the significant predictors of the bacterial community structure. The results provide the scientific basis for the synergistic improvement of biological functions and soil health in agricultural ecosystem from the perspective of promoting soil fertility and microbial diversity.

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栾璐,郑洁,程梦华,胡凯婕,孔培君,蒋瑀霁,孙波.不同秸秆还田方式对旱地红壤细菌多样性及群落结构的影响[J].土壤,2021,53(5):991-997. LUAN Lu, ZHENG Jie, CHENG Menghua, HU Kaijie, KONG Peijun, JIANG Yuji, SUN Bo. Effects of Different Types of Straw Returning on Bacterial Diversity and Community Structure in Dryland Red Soil[J]. Soils,2021,53(5):991-997

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