Agricultural land use change impacts soil CO2 emission and its C-13-isotopic signature in central China

doi:10.1016/j.still.2017.11.017

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	Agricultural land use change impacts soil CO2 emission and its C-13-isotopic signature in central China
	Zhang, Qian 1,2; Wu, Junjun 1; Lei, Yao 1; Yang, Fan 1,2; Zhang, Dandan 1,2; Zhang, Kerong 1; Zhang, Quanfa 1; Cheng, Xiaoli 1
刊名	SOIL & TILLAGE RESEARCH
	2018-04-01
卷号	177 页码:105-112
关键词	Afforestation Stable carbon isotope Soil respiration
ISSN号	0167-1987
DOI	10.1016/j.still.2017.11.017
英文摘要	Land use change has been widely considered as a key driver of global carbon (C) dynamics. However, the impact of agricultural land use change on soil respiration and its C-13-isotopic signature of CO2 are not fully understood. Therefore, we conducted a field experiment to investigate the seasonal variation of soil CO2 flux and its C-13-isotopic signature and their relationships with biotic factors and abiotic factors under land use conversion from croplands to afforested land (woodland and shrubland) after 30 years. Measurement of CO2 flux was conducted once a month for a whole year. The results showed that the conversion cropland to afforested land significantly increased soil CO2 flux and lowered the delta C-13 of soil CO2. The soil CO2 flux showed similar seasonal patterns among land use types with the highest (994.87 mg m(-2) h(-1)) in summer and the lowest (25.53 mg m(-2) h(-1)) in winter. The soil CO2 flux was positively related to soil organic C and labile C of topsoil (0-10 cm), as well as soil temperature, whereas the delta C-13 of soil CO2 emission was positively correlated with the delta C-13 of microbial biomass and negatively correlated with soil temperature. Overall, our results reveal that subject to long-term land use change, soil CO2 fluxes significantly increase in afforested land due to improved availability of soil C, and its C-13-isotopic signature are strongly related to isotope signature of plant litter inputs.
资助项目	National Natural Science Foundation of China[31470557] ; National Natural Science Foundation of China[31270550] ; Chinese Academy of Sciences[XDB15010200]
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000424073900012
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/3782]
专题	中国科学院武汉植物园
通讯作者	Zhang, Kerong; Cheng, Xiaoli
作者单位	1.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan, Hubei, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qian,Wu, Junjun,Lei, Yao,et al. Agricultural land use change impacts soil CO2 emission and its C-13-isotopic signature in central China[J]. SOIL & TILLAGE RESEARCH,2018,177:105-112.
APA	Zhang, Qian.,Wu, Junjun.,Lei, Yao.,Yang, Fan.,Zhang, Dandan.,...&Cheng, Xiaoli.(2018).Agricultural land use change impacts soil CO2 emission and its C-13-isotopic signature in central China.SOIL & TILLAGE RESEARCH,177,105-112.
MLA	Zhang, Qian,et al."Agricultural land use change impacts soil CO2 emission and its C-13-isotopic signature in central China".SOIL & TILLAGE RESEARCH 177(2018):105-112.