干旱区生态环境知识资源中心(Arid): Spatio-temporal Variation of Soil Respiration and Its Driving Factors in Semi-arid Regions of North China

Arid

	Spatio-temporal Variation of Soil Respiration and Its Driving Factors in Semi-arid Regions of North China
	Zeng Xinhua; Song Yigang; Zhang Wanjun; He Shengbing
来源期刊	Chinese Geographical Science
ISSN	1002-0063
出版年	2018
卷号	28 期号:1 页码:12-24
英文摘要	Soil respiration (SR) is the second-largest flux in ecosystem carbon cycling. Due to the large spatio-temporal variability of environmental factors, SR varied among different vegetation types, thereby impeding accurate estimation of CO_2 emissions via SR. However, studies on spatio-temporal variation of SR are still scarce for semi-arid regions of North China. In this study, we conducted 12-month SR measurements in six land-use types, including two secondary forests (Populus tomentosa (PT) and Robinia pseudoacacia (RP)), three artificial plantations (Armeniaca sibirica (AS), Punica granatum (PG) and Ziziphus jujuba (ZJ)) and one natural grassland (GR), to quantify spatio-temporal variation of SR and distinguish its controlling factors. Results indicated that SR exhibited distinct seasonal patterns for the six sites. Soil respiration peaked in August 2012 and bottomed in April 2013. The temporal coefficient of variation (CV) of SR for the six sites ranged from 76.98% to 94.08%, while the spatial CV of SR ranged from 20.28% to 72.97% across the 12-month measurement. Soil temperature and soil moisture were the major controlling factors of temporal variation of SR in the six sites, while spatial variation in SR was mainly caused by the differences in soil total nitrogen (STN), soil organic carbon (SOC), net photosynthesis rate, and fine root biomass. Our results show that the annual average SR and Q_(10) (temperature sensitivity of soil respiration) values tended to decrease from secondary forests and grassland to plantations, indicating that the conversion of natural ecosystems to man-made ecosystems may reduce CO_2 emissions and SR temperature sensitivity. Due to the high spatio-temporal variation of SR in our study area, care should be taken when converting secondary forests and grassland to plantations from the point view of accurately quantifying CO_2 emissions via SR at regional scales.
英文关键词	soil respiration spatio-temporal variation substrate availability temperature sensitivity global carbon cycle North China
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:6157579
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335910
作者单位	Zeng Xinhua, College of Environmental Science and Engineering,Shanghai Jiaotong University;;Center for Agricultural Resources Research,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences, ;;Key Laboratory of Agricultural Water Resources, Chinese Academy of Sciences, ;;Shijiazhuang, Shanghai;; 200240;;050021.; Song Yigang, Shanghai Chenshan Plant Science Research Center,Chinese Academy of Sciences, Shanghai 201602, China.; Zhang Wanjun, Center for Agricultural Resources Research,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences, Key Laboratory of Agricultural Water Resources, Chinese Academy of Sciences, Shijiazhuang, Hebei 050021, China.; He Shengbing, College of Environmental Science and Engineering,Shanghai Jiaotong University, Shanghai 200240, China.
推荐引用方式 GB/T 7714	Zeng Xinhua,Song Yigang,Zhang Wanjun,et al. Spatio-temporal Variation of Soil Respiration and Its Driving Factors in Semi-arid Regions of North China[J],2018,28(1):12-24.
APA	Zeng Xinhua,Song Yigang,Zhang Wanjun,&He Shengbing.(2018).Spatio-temporal Variation of Soil Respiration and Its Driving Factors in Semi-arid Regions of North China.Chinese Geographical Science,28(1),12-24.
MLA	Zeng Xinhua,et al."Spatio-temporal Variation of Soil Respiration and Its Driving Factors in Semi-arid Regions of North China".Chinese Geographical Science 28.1(2018):12-24.