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放牧实践通过改变它们的网络稳定性来影响Kobresia humilis的植物圈和树枝圈细菌群落

Jin-Peng Hu¹, Ming-Xu Zhang¹, Zhao-Long Lü¹

¹Center for Grassland Microbiome; State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry, Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China.

The Science of the total environment

|July 30, 2023

概括

放牧实践对青海-西藏高原的Kobresia humilis细菌群落和土壤产生重大影响. 绵羊放牧对K. humilis的负面影响比雅克放牧更大,影响土壤营养素和细菌网络.

科学领域:

生态生态学生态生态学
微生物学微生物学
农业学是一种农业学.

背景情况:

畜牧放牧是青海西藏高原 (QTP) 草原生态系统的主要驱动因素.
主导的植物物种Kobresia humilis及其相关的微生物群落对于生态系统的健康至关重要.
了解不同放牧策略对K. humilis的影响对于可持续的草原管理至关重要.

研究的目的:

研究放牧围 (GE),单种放牧 (雅克/绵羊) 和混合放牧 (雅克:绵羊比例) 对K. humilis植物圈和树枝圈细菌群落的影响.
评估这些放牧做法对土壤特性的影响.
阐明雅克与绵羊放牧的差异性影响背后的机制.

主要方法:

在K. humilis.身上进行了人工控制的放牧实验.
用分子技术分析了植物圈和树叶圈中的细菌群落.
测量了土壤特性,包括营养度.
用分子生态网络分析来研究细菌相互作用.

主要成果:

牧场围 (GE) 增加了植被覆盖面和树根球细菌多样性,但减少了植物数量和网络稳定性.
与GE相比,放牧处理通常降低了土壤NO3--N,K+和Cl-.
羊放牧 (SG) 减少了土壤NH4+-N,TN,K+和Na+比雅克放牧 (YG) 更多.
适度的放牧强度促进了细菌网络的稳定性,并减少了r-strategists的丰富性.
蛋白质细菌和Actinobacteriota分别被确定为植物圈和树脂圈中的基石分类.

结论:

放牧围具有混合作用,增强某些方面,同时破坏细菌网络的稳定性.
绵羊放牧对K. humilis的有害影响比雅克放牧更大,影响土壤和微生物群落.
了解这些差异性影响对于管理QTP上的高山草原至关重要.

关键词:

细菌多样性的细菌多样性细菌网络是一种细菌网络.放牧的做法放牧的做法科布雷西亚 humilis 羞辱性的青海 - 西藏高原青海 - 西藏高原

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