Carbon budget and greenhouse gas balance during the initial years after rice paddy conversion to vegetable cultivation

doi:10.1016/j.scitotenv.2018.01.207

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Carbon budget and greenhouse gas balance during the initial years after rice paddy conversion to vegetable cultivation
	Wu, Lei 1; Wu, Xian 1; Lin, Shan 1; Wu, Yupeng 1; Tang, Shuirong 1; Zhou, Minghua2 ; Shaaban, Muhammad 1; Zhao, Jinsong 1; Hu, Ronggui 1; Kuzyakov, Yakov 1,3,4,5
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2018-06-15
卷号	627 页码:46-56
关键词	Land-use conversion Net ecosystem carbon budget CH4 N2O Greenhouse gas balance
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2018.01.207
英文摘要	Rice paddy conversion to vegetable production is a common agricultural practice driven by economic benefits and shifting diets. However, little is known on the initial effects of this land-use conversion on net ecosystem carbon budget (NECB) and greenhouse gas (GHG) balance. Annual NECB and emissions of CH4 and N2O were measured from a native double rice cropping system (Rice) and a vegetable field recently converted from rice paddy (Veg) under no nitrogen (N) fertilization (Rice-N-0 and Veg-N-0) and conventional N fertilization (Rice-N+ and Veg-N+) during the initial four years upon conversion in subtropical China. Land-use conversion from rice to vegetable cultivation led to substantial C losses (2.6 to 4.5 Mg C ha(-1) yr(-1)), resulting from strongly reduced C input by 44-52% and increased soil organic matter mineralization by 46-59% relative to Rice. The magnitude of C losses from Veg was highest in the first year upon conversion, and showed a decreasing trend over time. N fertilization shifted rice paddy from a slight C source in Rice-N-0 (-1.0 Mg C ha(-1) yr(-1)) to a significant C sink in Rice-N+ (1.1 Mg C ha(-1) yr(-1)) and alleviated the impact of land-use conversion on C loss via increased C input from higher crop productivity. Land-use conversion greatly increased the global warming potential (GWP) from Veg by 116-395% relative to Rice in the first year, primarily due to increased C losses and N2O emission outweighing the decreased CH4 emission. However, the GWP did not show obvious difference between Rice and Veg in the following years. Nfertilization and land-use conversion interactively increased GWP in the first year via increased N2O production. Concluding, NECB and GHG emissions in the first year after conversion are crucial and should be considered when evaluating the environmental consequences of land-use conversion. (C) 2018 Elsevier B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000431848500006
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/22997]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Hu, Ronggui
作者单位	1.Huazhang Agr Univ, Coll Resources & Environm, Wuhan 430070, Hubei, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China 3.Univ Gottingen, Dept Soil Sci Temperate Ecosyst, Busgenweg 2, D-37077 Gottingen, Germany 4.Kazan Fed Univ, Inst Environm Sci, Kazan 420049, Russia 5.RUDN Univ, Agrotechnol Inst, Moscow, Russia 6.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China
推荐引用方式 GB/T 7714	Wu, Lei,Wu, Xian,Lin, Shan,et al. Carbon budget and greenhouse gas balance during the initial years after rice paddy conversion to vegetable cultivation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,627:46-56.
APA	Wu, Lei.,Wu, Xian.,Lin, Shan.,Wu, Yupeng.,Tang, Shuirong.,...&Wu, Jinshui.(2018).Carbon budget and greenhouse gas balance during the initial years after rice paddy conversion to vegetable cultivation.SCIENCE OF THE TOTAL ENVIRONMENT,627,46-56.
MLA	Wu, Lei,et al."Carbon budget and greenhouse gas balance during the initial years after rice paddy conversion to vegetable cultivation".SCIENCE OF THE TOTAL ENVIRONMENT 627(2018):46-56.