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SOIL BACTERIAL COMMUNITIES IN DIFFERENT AGED Sophora Davidii PLANTATIONS IN A KARST REGION

文献类型： 外文期刊

作者： Long, Zhongfu 1 ; Ding, Leilei 2 ; Wang, Mengya 3 ; Wang, Puchang 2 ; Ma, Peijie 2 ; Hou, Fujiang 1 ;

作者机构： 1.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Herbage Improvement & Grassland Agr, Minist Agr & Rural Affairs,Key Lab Grassland Live, Lanzhou 730020, Peoples R China

2.Guizhou Acad Agr Sci, Guizhou Inst Prataculture, Guiyang 550006, Guizhou, Peoples R China

3.Guizhou Univ, Coll Anim Sci, Guiyang 550025, Guizhou, Peoples R China

关键词： Microbiome; karst soil; elemental limitation; environmental selection; stand age; shrub

期刊名称：FRESENIUS ENVIRONMENTAL BULLETIN （ 影响因子：0.618； 五年影响因子：0.583 ）

ISSN： 1018-4619

年卷期： 2022 年 31 卷 12 期

页码：

收录情况： SCI

摘要： Restoration for ensuring ecological security is always a high priority in China. Assessment of revegetation consequences are crucial for formulating sustainable policy. Our objective was to reveal the structural and functional shifts in the belowground microbiome according to stand age in the karst regions of southwestern (SW) China, where revegetation is widespread. We studied the shifts in soil bacterial structure and function of Sophora davidii plantations according to an age sequence (0, 4, and 8 years old), as well as their edaphic drivers, using high-throughput gene sequencing, non-metric multidimensional scaling, and Spearman correlation analysis. The results showed that 4-year-old stands mitigated soil microbial nitrogen (N) limitation. The increases in total phosphorus (P), organic carbon (C), total N, available calcium, inorganic C, and available N as well as decreases in available P drove the agerelated shifts in soil bacterial community composition. Soil organic C, inorganic C, total and available N, as well as total and available P, contributed to soil bacterial diversity. Both increases in organic C:total P and the mitigation of N limitation in 4-year-old stands enhanced the abundance of bacterial predicted metabolic pathways involving infectious human disease. This study suggested that stand age changed the structure and predicted function of soil bacteria through soil environmental modification. Moreover, attention should be paid to soil microbial functions under vegetation restoration, and evidence of the effects of soil opportunistic bacteria on human health should be provided in future studies.

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