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人工草原的建立改变了土壤的有机碳分数和cbbL型碳分离微生物群落

Linge Shan¹, Aasitaiken Julihaiti¹, Wenhao Wang¹

¹Key Laboratory of Grassland Resources and Ecology of Xinjiang, College of Grassland Sciences, Xinjiang Agricultural University, Ürümqi, China.

Frontiers in microbiology

|December 25, 2025

概括

将干旱的耕地转化为人工草地,特别是豆类,可以增加土壤有机碳和碳固定微生物. 这提高了干旱地区的生态系统恢复和碳捕获潜力.

科学领域:

土壤科学土壤科学
微生物学微生物学
生态生态学生态生态学

背景情况:

土壤有机碳 (SOC) 动态对于干旱生态系统的恢复和碳封存至关重要.
了解微生物驱动因素是管理这些脆弱环境中的SOC的关键.

研究的目的:

研究将耕地转化为人工草地 (草地和豆类) 对干旱地区的SOC分量和碳固定微生物群落的影响.
确定影响这些微生物群落的关键环境因素.

主要方法:

在耕地 (CK),草地 (GG) 和豆类草地 (LG) 中比较了土壤有机碳分量 (POC,MAOC) 和碳矿化.
使用cbbL基因分析 (qPCR和amplicon测序) 量化了碳固定微生物的丰富性,并描述了它们的社区组成.

主要成果:

豆类草原 (LG) 显示出最高的cbbL基因丰富性和丰富的特定碳固定系 (SinoRhizobium,MesoRhizobium).
草地草地 (GG) 的矿物相关有机碳 (MAOC) 含量高于CK和LG.
这两种草原类型都改变了微生物社区结构,增加了Actinobacteria和减少了Planctomycetes的相对丰度.

结论:

人造草地,特别是豆类类型的草地,增强了干旱地区的土壤碳捕集潜力.
转化为草原调节土壤特性,丰富关键的碳固定微生物种群,支持生态恢复.

关键词:

人工草原的建立建立人工草原的建立.碳封存是碳的封存方式.cbbL 基因基因基因微生物社区的微生物社区.与矿物相关的有机碳 (MAOC)有机碳颗粒物 (POC)

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