高寒草甸土壤微生物群落功能多样性对广布弓背蚁蚁丘扰动的响应

发布时间：2018-03-14 19:34

本文选题：蚁丘　切入点：Biolog-ECO　出处：《草业学报》2017年01期 　论文类型：期刊论文

【摘要】：为了解蚂蚁在高寒草甸生态系统中的功能和作用,评估和认识高寒草甸生态系统的健康状况和稳定性,利用Biolog-ECO生态板法对蚁丘干扰后高寒草甸土壤理化性质以及土壤微生物功能多样性进行研究分析,结果表明,1)蚁丘扰动后0~10cm土层土壤有机质、全氮、速效氮、速效磷、速效钾含量均显著高于蚁丘10~20cm土层(P0.05),而蚁丘扰动与土层深度的交互作用对理化性质均无显著影响(P0.05);2)蚁丘干扰后高寒草甸土壤微生物多样性指数(Shannon-Weiner指数、Pielou指数、McIntosh指数和底物碳源利用数)有所增加;3)主成分分析表明蚁丘干扰对土壤微生物功能多样性产生了影响,改变了微生物代谢功能特征,土壤微生物利用的主要碳源是碳水化合物、氨基酸类和羧酸类;4)冗余分析表明土壤养分影响土壤微生物碳源代谢特征和功能。因此,由于蚂蚁的挖掘活动、有机质的累积等改变了蚁丘土壤微环境,进而改变了土壤微生物的碳源利用类型和代谢功能。
[Abstract]:In order to understand the function and function of ants in alpine meadow ecosystem, assess and understand the health status and stability of alpine meadow ecosystem. The physical and chemical properties of alpine meadow soil and the diversity of soil microbial function were studied by Biolog-ECO ecological plate method. The results showed that the soil organic matter, total nitrogen, available nitrogen, available phosphorus and soil organic matter, total nitrogen, available nitrogen and available phosphorus in 0 ~ 10 cm soil layer after disturbance of ant mound were studied. The available potassium content was significantly higher than that in 1020cm soil layer of ant mound, but the interaction between ant mound disturbance and soil depth had no significant effect on physical and chemical properties of Alpine Meadow soil (P0.05 / 2).) the Shannon-Weiner index and Pielou index (McIntosh index) of alpine meadow soil after ant mound disturbance had no significant effect on physical and chemical properties. Principal component analysis (PCA) showed that mound interference had an effect on soil microbial functional diversity. The main carbon sources used by soil microorganisms are carbohydrates, amino acids and carboxylic acids) redundancy analysis shows that soil nutrients affect the metabolic characteristics and functions of soil microbial carbon sources. The accumulation of organic matter changed the soil microenvironment of ant mound, and then changed the carbon source utilization type and metabolic function of soil microorganism.
【作者单位】：西南民族大学生命科学与技术学院;
【基金】：国家自然基金项目(31370542) 国家重点基础研究发展计划(973计划)(2013CBA01807) 中央高校基本科研业务费专项资金项目(2014NZYTD01) 西南民族大学研究生创新型科研项目(CX2016SZ070)资助
【分类号】：S812

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