气候变化领域集成服务门户(CCPortal): Management and land use change effects on soil carbon in northern China's grasslands: a synthesis

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DOI	10.1016/j.agee.2011.06.002
	Management and land use change effects on soil carbon in northern China's grasslands: a synthesis
	Wang, Shiping; Wilkes, Andreas; Zhang, Zhicai; Chang, Xiaofeng; Lang, Rong; Wang, Yanfen; Niu, Haishan
通讯作者	Niu, HS (通讯作者)
发表日期	2011
ISSN	0167-8809
EISSN	1873-2305
起始页码	329
结束页码	340
卷号	142 期号:3-4
英文摘要	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 CO2 emissions in China in 2006. (C) 2011 Elsevier B.V. All rights reserved.
关键词	AGRICULTURAL SOILS GREAT-PLAINS NITROGEN SEQUESTRATION STORAGE PASTURE VEGETATION TEXTURE IMPACTS CLIMATE
英文关键词	Carbon sequestration; Grasslands; Land use change; Grazing; Cultivation; Pasture
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
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257861
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]. 中国科学院青藏高原研究所,2011,142(3-4).
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).
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).