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题名: Management and land use change effects on soil carbon in northern China's grasslands: a synthesis
作者: Wang, Shiping2; Wilkes, Andreas3, 4; Zhang, Zhicai3, 4; Chang, Xiaofeng1, 5; Lang, Rong3; Wang, Yanfen1; Niu, Haishan1
刊名: AGRICULTURE ECOSYSTEMS & ENVIRONMENT
关键词: Carbon sequestration ; Grasslands ; Land use change ; Grazing ; Cultivation ; Pasture
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 CO(2) emissions in China in 2006. (C) 2011 Elsevier B.V. All rights reserved.
出版日期: 2011-08-01
卷号: 142, 期号:3-4, 页码:329-340
DOI标识: 10.1016/j.agee.2011.06.002
语种: 英语
收录类别: SCI
学科分类: Agriculture; Environmental Sciences & Ecology
ISSN号: 0167-8809
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/5209
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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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

Recommended Citation:
Wang, SP; Wilkes, A; Zhang, ZC; Chang, XF; Lang, R; Wang, YF; Niu, HS.Management and land use change effects on soil carbon in northern China's grasslands: a synthesis,AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2011,142(3-4):329-340
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