光伏园区建设对青藏高原高寒荒漠草地土壤原核微生物群落的影响

doi:10.11733/j.issn.1007-0435.2021.05.023

草地学报 ›› 2021, Vol. 29 ›› Issue (5): 1061-1069.DOI: 10.11733/j.issn.1007-0435.2021.05.023

光伏园区建设对青藏高原高寒荒漠草地土壤原核微生物群落的影响

丁成翔¹, 刘禹²

1. 青海大学畜牧兽医科学院, 青海西宁 810016;
2. 北京林业大学, 北京 100083

收稿日期:2020-12-01 修回日期:2021-01-01 出版日期:2021-05-15 发布日期:2021-06-02
通讯作者: 丁成翔,E-mail:2011990016@qhu.edu.cn
作者简介:丁成翔(1980-)，男，宁夏中卫人，博士，主要从事青藏高原草地生态研究
基金资助:
青海省“昆仑英才·高端创新创业人才”项目；青海省畜牧兽医科学院基本科研业务费自主课题项目（MKY-2019-03）；国家重点研发计划项目（2016YFC0400307）资助

Effects of Solar Photovoltaic Park Construction on Soil Microbial Community in Alpine Desert of Qinghai Tibet Plateau

DING Cheng-xiang¹, LIU Yu²

1. Academy of Animal Husbandry and Veterinary Science, Qinghai University, Xining, Qinghai Province 810016, China;
2. Beijing Forestry University, Beijing 100083, China

Received:2020-12-01 Revised:2021-01-01 Online:2021-05-15 Published:2021-06-02

摘要/Abstract

摘要： 为探究光伏园区建设对土壤微生物群落结构的影响，本研究以青藏高原高寒荒漠草地为研究对象，基于16S扩增技术，分析未建设光伏园区（对照）及建设1年和6年后植被、土壤理化性质及土壤微生物之间的差异。研究结果显示：光伏园区建设后显著改变了区域微气候，土壤含水量显著增加、蒸散量显著降低；同时，地上总生物量和盖度随着建设年限的增加而增加，并显著高于未建设草地；土壤有机质含量、全氮含量和铵态氮含量在建设6年后显著增加；土壤微生物3种α多样性指数均显著降低，β多样性差异显著，芽单胞菌门等丰度显著降低；网络分析结果表明，光伏园区建设后，网络节点数减少，网络连接数呈现先减后增的趋势，模块化指数降低而节点之间的正相关性由70.86%增至94.26%，网络中物种竞争减少。综上所述，光伏园区建设一定程度上增加了生态系统的保水保肥性，但也可能导致地下微生物群落生态系统更为脆弱。

关键词: 光伏, 高寒荒漠, 地上生物量, 微生物群落结构, 网络

Abstract: In order to explore the impact of photovoltaic park construction on soil microbial community structure,the alpine desert of Qinghai Tibet Plateau was selected as the research object to analysis the changes in vegetation,soil physical and chemical properties and soil microorganisms based on 16S amplification technology,after one year and six years of photovoltaic park construction. The results showed that the regional microclimate was significantly changed,soil moisture content was significantly increased,and evapotranspiration was significantly reduced after the construction of PV Park. At the same time,the total aboveground biomass and coverage of vegetation increased with the increase of construction years and were significantly higher than that of the control grassland. Soil organic matter content,total nitrogen content and ammonium nitrogen content also increased significantly after 6 years of construction. The α diversity index of soil microorganism decreased significantly,β diversity showed significant difference,and the abundance of blastomonas decreased significantly. The results of network analysis showed that the number of nodes participating in the network decreased significantly,but the number of connections decreased firstly and then increased after the construction of PV Park. The modularity index decreased,while the positive correlation between nodes increased from 70.86% to 94.26%,and species competition decreased. These results indicate that the construction of photovoltaic park can increase the water and fertilizer conservation of the ecosystem to some extent,but it may also lead the underground microbial community ecosystem to be more vulnerable.

Key words: Solar photovoltaic, Alpine desert, Aboveground biomass, Microbial community structure, Network

中图分类号:

S812

丁成翔, 刘禹. 光伏园区建设对青藏高原高寒荒漠草地土壤原核微生物群落的影响[J]. 草地学报, 2021, 29(5): 1061-1069.

DING Cheng-xiang, LIU Yu. Effects of Solar Photovoltaic Park Construction on Soil Microbial Community in Alpine Desert of Qinghai Tibet Plateau[J]. Acta Agrestia Sinica, 2021, 29(5): 1061-1069.

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光伏园区建设对青藏高原高寒荒漠草地土壤原核微生物群落的影响

Effects of Solar Photovoltaic Park Construction on Soil Microbial Community in Alpine Desert of Qinghai Tibet Plateau

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