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Management and land use change effects of northern China ’s grasslands on soil carbon: a synthesis
牛海山
2011-05-06
Source PublicationAgriculture Ecosystems and Environment
ISSN0167-8809
Volume142Issue:1Pages:329-340
Other AbstractGrasslands 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 30yr after treatments began and tended to be greatest in the top 10cm 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 130.4gCm?2yr?1 for 0–40cm soil and 128.0gcm?2yr?1 for 0–30cm 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 0.24PgCyr?1, which is equivalent to about 16% of fossil fuel CO2 emissions in China in 2006.
Indexed BySCI
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/2148
Collection中国科学院西北高原生物研究所
Recommended Citation
GB/T 7714
牛海山. Management and land use change effects of northern China ’s grasslands on soil carbon: a synthesis[J]. Agriculture Ecosystems and Environment,2011,142(1):329-340.
APA 牛海山.(2011).Management and land use change effects of northern China ’s grasslands on soil carbon: a synthesis.Agriculture Ecosystems and Environment,142(1),329-340.
MLA 牛海山."Management and land use change effects of northern China ’s grasslands on soil carbon: a synthesis".Agriculture Ecosystems and Environment 142.1(2011):329-340.
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