干旱区生态环境知识资源中心(Arid): Soil Microbial Metabolic Quotient in Inner Mongolian Grasslands: Patterns and Influence Factors

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	Soil Microbial Metabolic Quotient in Inner Mongolian Grasslands: Patterns and Influence Factors
	Cao Yingqiu; Xu Li; Zhang Zhen; Chen Zhi; He Nianpeng
来源期刊	Chinese Geographical Science
ISSN	1002-0063
出版年	2019
卷号	29 期号:6 页码:1001-1010
英文摘要	Microbial metabolic quotient (MMQ) is the rate of soil microbial respiration per unit of microbial biomass, and represents the capacity of soil microbes to utilize soil organic matter. Understanding the regional variation and determinants of MMQ can help predict the responses of soil respiration rate to global climate change. Accordingly, we measured and analyzed MMQ-related data (e.g., soil basic respiration rate at 20℃ and soil microbial biomass) from 17 grassland sites, which located in meadow steppe, typical steppe, and desert steppe along a 1000-km transect across the Inner Mongolian grasslands, China. Results showed that MMQ varied significantly among the different grassland types (P < 0.05; desert > typical > meadow) and decreased from southwest to northeast (r =-0.81) with increasing latitude (r =-0.50), and with increasing mean annual precipitation (r =-0.69). Precipitation accounted for 56% of the total variation in MMQ, whereas temperature accounted for 26%. MMQ was negatively correlated with precipitation across the Inner Mongolian grasslands. Therefore, climate change, especially in regard to precipitation, may influence soil microbial respiration and soil carbon dynamics through altering MMQ. These results highlighted the importance of spatial patterns in MMQ for accurately evaluating the responses of soil respiration to climate change at regional and global scales.
英文关键词	soil respiration soil microbial biomass carbon precipitation temperature Inner Mongolian grassland
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6603492
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336200
作者单位	Cao Yingqiu, Resources and Environment College, Anhui Agricultural University, Hefei, Anhui 230036, China.; Zhang Zhen, Resources and Environment College, Anhui Agricultural University, Hefei, Anhui 230036, China.; Xu Li, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Key Laboratory of Ecosystem Network Observation and Modeling, Chinese Academy of Sciences, Beijing 100101, China.; Chen Zhi, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Key Laboratory of Ecosystem Network Observation and Modeling, Chinese Academy of Sciences, Beijing 100101, China.; He Nianpeng, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences;;College of Resources and Environment, University of Chinese Academy of Sciences;;Institute of Grassland Science, Northeast Normal University, Key Laboratory of Ecosystem Network Observation and Modeling, Chinese Academy of Sciences;;;;Key Laboratory of Vegetation...
推荐引用方式 GB/T 7714	Cao Yingqiu,Xu Li,Zhang Zhen,et al. Soil Microbial Metabolic Quotient in Inner Mongolian Grasslands: Patterns and Influence Factors[J],2019,29(6):1001-1010.
APA	Cao Yingqiu,Xu Li,Zhang Zhen,Chen Zhi,&He Nianpeng.(2019).Soil Microbial Metabolic Quotient in Inner Mongolian Grasslands: Patterns and Influence Factors.Chinese Geographical Science,29(6),1001-1010.
MLA	Cao Yingqiu,et al."Soil Microbial Metabolic Quotient in Inner Mongolian Grasslands: Patterns and Influence Factors".Chinese Geographical Science 29.6(2019):1001-1010.