Effects of Simulated Precipitation on Soil Edaphic Physicochemical Factors and Microbial Community Characteristics in Bird Island of Qinghai Lake on The Tibetan Plateau

doi:10.11733/j.issn.1007-0435.2021.05.021

Acta Agrestia Sinica ›› 2021, Vol. 29 ›› Issue (5): 1043-1052.DOI: 10.11733/j.issn.1007-0435.2021.05.021

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Effects of Simulated Precipitation on Soil Edaphic Physicochemical Factors and Microbial Community Characteristics in Bird Island of Qinghai Lake on The Tibetan Plateau

YANG Yang^1,2, ZHANG Ni^1,2, JIANG Li-li^1,2, CHEN Ke-long²

1. College of Life Science Qinghai Normal University, Xining, Qinghai Province 810008, China;
2. Qinghai Key Laboratory of Physical Geography and Environmental Processes, Xining, Qinghai Province 810008, China

Received:2020-12-04 Revised:2021-02-04 Online:2021-05-15 Published:2021-06-02

青海湖高寒草地土壤理化性质及微生物群落特征对模拟降水的响应

杨阳^1,2, 章妮^1,2, 蒋莉莉^1,2, 陈克龙²

1. 青海师范大学生命科学学院, 青海西宁 810008;
2. 青海省自然地理与环境过程重点实验室, 青海西宁 810008

通讯作者: 陈克龙,E-mail:ckl7813@163.com
作者简介:杨阳(1995-)，男，甘肃天水人，硕士研究生，主要从事湿地草地生态学研究，E-mail:myangyxs@163.com
基金资助:
国家自然科学基金项目（41661023）；第二次青藏高原综合科学考察研究（2019ZQKK0405）资助

Abstract

Abstract: Changes in global precipitation patterns affect soil physical and chemical properties and soil microbial community characteristics of grassland ecosystem. It is of great significance to understand the response of ecosystem characteristics to global change,to explore the relationship between soil physical and chemical factors and soil microbial community characteristics and precipitation changes in grassland. The study selected the alpine grassland ecosystem of Qinghai Lake Bird Island as the research object,a control group (NCK，100% precipitation) and two treated groups (NJ,50% precipitation; NZ，150% precipitation) were set up. The response characteristics of soil microbial communities to precipitation patterns were analyzed by high-throughput sequencing technology. The result of research showed thatthe abundance of bacterial and fungal communities increased,but the diversity of fungal communities decreased under the treatment of NJ. Similarly,the diversity of fungal community and the richness bacterial community increased under NZ,but the diversity of bacterial community decreased. The abundance of bacterial which increased under both NZ and NJ,but the overall relative abundance of fungal communities tended to decrease under NZ. There were significant differences in soil temperature,humidity,biomass,soil nitrate nitrogen (NO₃^--N),ammonium nitrogen (NH₄⁺-N) and total carbon content under NZ and NJ;Soil environmental factors had significant effects on the composition and diversity of soil microbial communities. It is concluded that the physical and chemical properties of soil and microbial communities respond significantly to changes in precipitation. Compared to bacteria,fungi is more sensitive to precipitation.

Key words: Simulated precipitation, Alpine grassland, Soil physical and chemical properties, Soil microorganism, Community characteristics

摘要： 为探究高寒草地生态系统特征对降水变化的响应，本研究以青海湖鸟岛高寒草地生态系统为研究对象，通过设置减少50%降水（NJ）、增加50%降水（NZ）试验处理和对照（NCK）3组不同降水条件，探究土壤理化因子及微生物群落对不同降水梯度的响应特征。研究结果表明：NJ，NZ处理均增加了细菌群落的丰富度降低了其多样性；NJ处理增加真菌群落的丰富度降低了其多样性，NZ处理增加了真菌群落的多样性降低了其丰富度；NJ处理增加了细菌和真菌群落的相对丰度，NZ处理降低了真菌群落相对丰度增加了细菌群落相对丰度；NZ，NJ处理下土壤温湿度及生物量变化差异显著，土壤硝态氮（NO₃^--N）、铵态氮（NH₄⁺-N）及全碳含量变化显著；土壤环境因子对土壤微生物群落组成与多样性具有显著影响。综上，土壤理化性质及微生物群落对降水变化的响应明显，真菌对降水处理的响应比细菌更为敏感。

关键词: 模拟降水, 高寒草地, 土壤理化性质, 土壤微生物, 群落特征

CLC Number:

S154.3

YANG Yang, ZHANG Ni, JIANG Li-li, CHEN Ke-long. Effects of Simulated Precipitation on Soil Edaphic Physicochemical Factors and Microbial Community Characteristics in Bird Island of Qinghai Lake on The Tibetan Plateau[J]. Acta Agrestia Sinica, 2021, 29(5): 1043-1052.

杨阳, 章妮, 蒋莉莉, 陈克龙. 青海湖高寒草地土壤理化性质及微生物群落特征对模拟降水的响应[J]. 草地学报, 2021, 29(5): 1043-1052.

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Effects of Simulated Precipitation on Soil Edaphic Physicochemical Factors and Microbial Community Characteristics in Bird Island of Qinghai Lake on The Tibetan Plateau

青海湖高寒草地土壤理化性质及微生物群落特征对模拟降水的响应

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