Management and land use change effects on soil carbon in northern China's grasslands: a synthesis

NWIPB OpenIR

	Management and land use change effects on soil carbon in northern China's grasslands: a synthesis
	Wang, Shiping 2; Wilkes, Andreas 3,4; Zhang, Zhicai 3,4; Chang, Xiaofeng 1,5; Lang, Rong 3; Wang, Yanfen 1; Niu, Haishan 1
	2011-08-01
发表期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
卷号	142 期号:3-4 页码:329-340
文章类型	Article
摘要	Grasslands cover about 40% of China's land area. This paper synthesizes 133 papers from China on the impacts of land use conversion and improved management practices on soil organic carbon (SOC) in China's grasslands. The synthesis finds that overgrazing and conversion of freely grazed grassland to cropland lead to an annual average decline of 2.3-2.8% in SOC, and have caused a loss of 30-35% of total grassland SOC in China. Improved management practices may reverse the loss of SOC. Exclosure of degraded grassland from grazing and conversion of cropland to abandoned fields (i.e. natural restoration) increased carbon content by 34% and 62% on average. Carbon sequestration rates were greatest during the first 30 yr after treatments began and tended to be greatest in the top 10 cm of soil. Carbon sequestration potential was negatively related to initial carbon and nitrogen concentrations in soils. Exclosure from grazing and the conversion of cropland to abandoned fields resulted in average carbon sequestration rates of 130.4 g C m(-2) yr(-1) for 0-40 cm soil and 128.0 g C m(-2) yr(-1) for 0-30 cm soil, representing annual average increases of 5.4-6.3%. Based on our results, achievement of the national objective to exclude grazing livestock from 150 million ha of China's grasslands and to establish 30 million ha of cultivated pasture by 2020 would sequester over 0.24 Pg Cyr(-1), which is equivalent to about 16% of fossil fuel CO(2) emissions in China in 2006. (C) 2011 Elsevier B.V. All rights reserved.; Grasslands cover about 40% of China's land area. This paper synthesizes 133 papers from China on the impacts of land use conversion and improved management practices on soil organic carbon (SOC) in China's grasslands. The synthesis finds that overgrazing and conversion of freely grazed grassland to cropland lead to an annual average decline of 2.3-2.8% in SOC, and have caused a loss of 30-35% of total grassland SOC in China. Improved management practices may reverse the loss of SOC. Exclosure of degraded grassland from grazing and conversion of cropland to abandoned fields (i.e. natural restoration) increased carbon content by 34% and 62% on average. Carbon sequestration rates were greatest during the first 30 yr after treatments began and tended to be greatest in the top 10 cm of soil. Carbon sequestration potential was negatively related to initial carbon and nitrogen concentrations in soils. Exclosure from grazing and the conversion of cropland to abandoned fields resulted in average carbon sequestration rates of 130.4 g C m(-2) yr(-1) for 0-40 cm soil and 128.0 g C m(-2) yr(-1) for 0-30 cm soil, representing annual average increases of 5.4-6.3%. Based on our results, achievement of the national objective to exclude grazing livestock from 150 million ha of China's grasslands and to establish 30 million ha of cultivated pasture by 2020 would sequester over 0.24 Pg Cyr(-1), which is equivalent to about 16% of fossil fuel CO(2) emissions in China in 2006. (C) 2011 Elsevier B.V. All rights reserved.
关键词	Carbon Sequestration Grasslands Land Use Change Grazing Cultivation Pasture
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]	AGRICULTURAL SOILS ; GREAT-PLAINS ; NITROGEN ; SEQUESTRATION ; STORAGE ; PASTURE ; ECOSYSTEMS ; VEGETATION ; DYNAMICS ; TEXTURE
收录类别	SCI
语种	英语
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS记录号	WOS:000295245100025
引用统计	被引频次：153[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/1522
专题	中国科学院西北高原生物研究所
作者单位	1.World Agroforestry Ctr ICRAF China Programme, Beijing 10049, Peoples R China 2.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China 3.Chinese Acad Sci, Kunming Inst Bot, Ctr Mt Ecosyst Studies, Kunming 650204, Peoples R China 4.World Agroforestry Ctr ICRAF China Programme, Beijing 100081, Peoples R China 5.Chinese Acad Sci, NW Inst Plateau Biol, Key Lab Adapt & Evolut Plateau Biota, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Wang, Shiping,Wilkes, Andreas,Zhang, Zhicai,et al. Management and land use change effects on soil carbon in northern China's grasslands: a synthesis[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2011,142(3-4):329-340.
APA	Wang, Shiping.,Wilkes, Andreas.,Zhang, Zhicai.,Chang, Xiaofeng.,Lang, Rong.,...&Niu, Haishan.(2011).Management and land use change effects on soil carbon in northern China's grasslands: a synthesis.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,142(3-4),329-340.
MLA	Wang, Shiping,et al."Management and land use change effects on soil carbon in northern China's grasslands: a synthesis".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 142.3-4(2011):329-340.