The carbon sequestration potential of China's grasslands

	The carbon sequestration potential of China's grasslands
	Song, Jian; Wan, Shiqiang; Peng, Shushi; Piao, Shilong; Ciais, Philippe; Han, Xingguo; Zeng, De-Hui; Cao, Guangmin; Wang, Qibing; Bai, Wenming
刊名	ECOSPHERE
	2018
卷号	9 期号:10
关键词	carbon cycling degraded grasslands Grain for Green Project grassland management pairwise field sampling restored grasslands
英文摘要	With the consequences of anthropogenic activities such as overgrazing and cropland expansion, grasslands in China suffer severe degradation since the 1980s. The national grassland restoration policy enacted at the beginning of the 21th century has the potential to increase plant growth and productivity and hence regional carbon (C) sequestration. Here, we assessed plant and soil organic C (SOC) stocks for both degraded and restored/non-degraded plots at 802 sites in Northern and Northwest China using pairwise field sampling and quantified the C sequestration potential (CSP) of China's grasslands. A geostatistical model was performed to upscale the field measurements to national scale. Averaged across the 802 paired grassland sites, the mean plant biomass C and SOC density in the top 1 m depth were 0.44 +/- 0.17 and 8.82 +/- 1.78 kg C/m(2), respectively. Compared to the degraded grasslands, the restored grasslands had an average of 0.11 +/- 0.17 (29.2%) and 1.02 +/- 1.28 kg C/m(2) (12.3%) greater plant biomass C and SOC density, respectively. The geostatistical model produced a total CSP of 17.3 +/- 2.3 Pg C in China's grasslands, with 94% in soils. If the CSP estimated in this study could be achieved, the current grassland SOC stock would increase by 61%, offsetting 11 yr (2000-2010) of national fossil CO2 emissions.
内容类型	期刊论文
源URL	[http://210.75.249.4/handle/363003/59957]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Song, Jian,Wan, Shiqiang,Peng, Shushi,et al. The carbon sequestration potential of China's grasslands[J]. ECOSPHERE,2018,9(10).
APA	Song, Jian.,Wan, Shiqiang.,Peng, Shushi.,Piao, Shilong.,Ciais, Philippe.,...&Liu, Lingli.(2018).The carbon sequestration potential of China's grasslands.ECOSPHERE,9(10).
MLA	Song, Jian,et al."The carbon sequestration potential of China's grasslands".ECOSPHERE 9.10(2018).