Methane emissions in grazing systems in grassland regions of China: A synthesis

doi:10.1016/j.scitotenv.2018.11.102

	Methane emissions in grazing systems in grassland regions of China: A synthesis
	Tang, Shiming 1,2; Ma, Lei 3; Wei, Xiaoting 1; Tian, Dashuan 4; Wang, Bojie 2; Li, Zhaolei 4; Zhang, Yujuan 5; Shao, Xinqing 1
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-03-01
卷号	654 页码:662-670
关键词	CH4 budget Grazing intensity Grazing system Soil CH4 uptake CH4 emissions Offset
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2018.11.102
通讯作者	Shao, Xinqing(shaoxinqing@163.com)
英文摘要	The effects of grazing on methane (CH4) budgets are important for understanding the balance of greenhouse gas emissions and removals in grassland ecosystems. However, the CH4 budgets of grazing systems, that is simultaneously considering CH4 uptake by grassland soils and emissions from ruminant enteric fermentation, livestock folds and animal feces, are poorly investigated, particularly for Chinese grasslands, and thus, remained unclear currently. Here, a synthesis of 43 individual studies was carried out to assess the grazing season/annual CH4 budgets and their responses to grazing in grassland ecosystems of China The results showed that heavy grazing (HG) significantly decreased, while light grazing (LG) and moderate grazing (MG) had no significant effects soil CH4 uptake, as compared to un-grazing sites. Grazing has shifted Chinese grasslands from a sink to source for atmospheric CH4, and the grazing season/annual CH4 budgets increased with increasing grazing intensity, while the offset of CH4 uptake by grassland soils to total CH4 emissions from sheep, sheepfolds and feces were exponentially decreased with increasing grazing intensity. Moreover, the herbage biomass (HBM), organic matter intake (OMI) and live weight gain (LWG) were decreased while CH4 emission intensities (i.e., CH4 emission per HBM, OMI, and LWG) were linearly increased with inaeasing grazing intensity. Our results demonstrate that mediating grazing intensity, e.g., from HG to LG, could yield the optimal balance between maintaining productive grasslands and meanwhile mitigating CH4 emissions. This study could help for building strategies with implications for grassland management in China with similar CH4 emission problems. (C) 2018 Elsevier B.V. All tights reserved.
资助项目	National Key Research and Development Program[2016YFC0501902] ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China[31772654] ; Natural Science Foundation of Inner Mongolia[2016BS0320]
WOS关键词	CARBON-DIOXIDE ; GROWING-SEASON ; TYPICAL STEPPE ; INNER-MONGOLIA ; NITROUS-OXIDE ; SOIL ; SHEEP ; N2O ; CH4 ; CO2
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000458630100056
资助机构	National Key Research and Development Program ; Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China ; Natural Science Foundation of Inner Mongolia
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/49491]
专题	中国科学院地理科学与资源研究所
通讯作者	Shao, Xinqing
作者单位	1.China Agr Univ, Grassland Dept, Anim Sci & Technol Coll, 2 Yuanmingyuan West Rd, Beijing 100193, Peoples R China 2.Inner Mongolia Univ, Sch Ecol & Environm, Dept Ecol, 235 West Coll Rd, Hohhot 010021, Peoples R China 3.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 5.Chinese Acad Agr Sci, Minist Agr, Key Lab Grassland Ecol & Restorat, Inst Grassland Res, Hohhot 010010, Peoples R China
推荐引用方式 GB/T 7714	Tang, Shiming,Ma, Lei,Wei, Xiaoting,et al. Methane emissions in grazing systems in grassland regions of China: A synthesis[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,654:662-670.
APA	Tang, Shiming.,Ma, Lei.,Wei, Xiaoting.,Tian, Dashuan.,Wang, Bojie.,...&Shao, Xinqing.(2019).Methane emissions in grazing systems in grassland regions of China: A synthesis.SCIENCE OF THE TOTAL ENVIRONMENT,654,662-670.
MLA	Tang, Shiming,et al."Methane emissions in grazing systems in grassland regions of China: A synthesis".SCIENCE OF THE TOTAL ENVIRONMENT 654(2019):662-670.