Response of Soil Microbial Community Diversity to Degradation Degree of Alpine Meadow

doi:10.11733/j.issn.1007-0435.2020.06.001

Acta Agrestia Sinica ›› 2020, Vol. 28 ›› Issue (6): 1489-1497.DOI: 10.11733/j.issn.1007-0435.2020.06.001

Response of Soil Microbial Community Diversity to Degradation Degree of Alpine Meadow

YAO Yu-jiao¹, LIANG Ting¹, MA Yuan¹, ZHOU Hui-cheng¹, XIAO Hai-long¹, SUN Bin², ZHANG De-gang¹, CHEN Jian-gang¹

1. College of Grassland Science, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem of Education Ministry, Sino-US Research Centers for Grazingland Ecosystem Sustainability, Lanzhou, Gansu Province 730070, China;
2. General Station of Grassland Technology Exrension of Gansu Province, Lanzhou, Gansu Province 730000, China

Received:2020-03-24 Revised:2020-06-10 Online:2020-12-15 Published:2020-12-02

土壤微生物群落多样性对高寒草甸退化程度的响应

姚玉娇¹, 梁婷¹, 马源¹, 周会程¹, 肖海龙¹, 孙斌², 张德罡¹, 陈建纲¹

1. 甘肃农业大学草业学院, 草业生态系统教育部重点实验室, 中-美草地畜牧业可持续发展研究中心, 甘肃兰州 730070;
2. 甘肃省草原技术推广总站, 甘肃兰州 730000

通讯作者: 张德罡
作者简介:姚玉娇(1991-),女,内蒙古赤峰人,硕士研究生,主要从事草地资源与生态研究,E-mail:1663877792@qq.com
基金资助:
甘肃省草原技术推广总站“草原生态状况评价技术规范研究”（034-036272）资助

Abstract

Abstract: Alpine meadow under different degradation degrees in Tianzhu Tibetan Autonomous County in the eastern Qilian Mountains was selected to study the characteristics of soil microbial community diversity using the method of Biolog. The results showed that the ability of soil microorganism to utilize carbon source decreased along with the depth of soil layer. During the degradation process of alpine meadow,the plant coverage,total biomass of aboveground plants,soil pH,soil moisture content,soil organic carbon content,soil total nitrogen content and soil total phosphorus content decreased with the degree of degradation. The degradation degree of alpine meadow has an significant impact on soil microorganism. Soil organic matter content (C:N),total phosphorus content (TP) and total nitrogen content (TN) are the main factors among the environmental parameters. In alpine meadow with different degradation degrees,soil organic matter content (SOC),electrical conductivity (EC) and pH are the limiting factors for the carbon source utilization capacity of soil microorganisms. And soil environment is an important impact factor on soil microorganisms.

Key words: Qilian Mountains, Alpine meadow, Diversity of soil microbial community, Carbon metabolism

摘要： 本研究以祁连山东缘天祝藏族自治县4种不同退化程度的高寒草甸为研究对象，采用Biolog技术探讨土壤微生物群落多样性在不同退化程度高寒草甸下变化特征。结果表明：随土层加深土壤微生物利用碳源能力呈递减趋势；在高寒草甸退化过程中植物覆盖度、地上植物总生物量、土壤pH值、土壤含水量、土壤有机碳含量、土壤全氮含量、土壤全磷含量随退化程度加深呈下降趋势；高寒草甸退化显著影响土壤微生物对31种碳源的利用程度。在环境因子中对碳源代谢多样性影响最大的是碳氮比、全磷含量、全氮含量，在不同退化程度高寒草甸中土壤有机质含量、电导率、pH是土壤微生物利用碳源能力的限制因子，土壤环境因子是影响土壤微生物的重要因素。

关键词: 祁连山, 高寒草甸, 土壤微生物群落多样性, 碳源代谢

CLC Number:

S154.3

YAO Yu-jiao, LIANG Ting, MA Yuan, ZHOU Hui-cheng, XIAO Hai-long, SUN Bin, ZHANG De-gang, CHEN Jian-gang. Response of Soil Microbial Community Diversity to Degradation Degree of Alpine Meadow[J]. Acta Agrestia Sinica, 2020, 28(6): 1489-1497.

姚玉娇, 梁婷, 马源, 周会程, 肖海龙, 孙斌, 张德罡, 陈建纲. 土壤微生物群落多样性对高寒草甸退化程度的响应[J]. 草地学报, 2020, 28(6): 1489-1497.

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Response of Soil Microbial Community Diversity to Degradation Degree of Alpine Meadow

土壤微生物群落多样性对高寒草甸退化程度的响应

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