干旱区生态环境知识资源中心(Arid): Altitude pattern of carbon stocks in desert grasslands of an arid land region

Arid

	Altitude pattern of carbon stocks in desert grasslands of an arid land region
	Yang Rong; Kong Junqia; Du Zeyu; Su Yongzhong
来源期刊	Sciences in Cold and Arid Regions
ISSN	1674-3822
出版年	2018
卷号	10 期号:5 页码:404-412
英文摘要	For estimating the altitude-distribution pattern of carbon stocks in desert grasslands and analyzing the possible mechanism for this distribution, a detailed study was performed through a series of field vegetation surveys and soil samplings from 90 vegetation plots and 45 soil profiles at 9 sites of the Hexi Corridor region, Northwestern China. Aboveground, belowground, and litter-fall biomass-carbon stocks ranged from 43 to 109, 23 to 64, and 5 to 20 g/m~2, with mean values of 80.82, 44.91, and 12.15 g/m~2, respectively. Soil-carbon stocks varied between 2.88 and 3.98 kg/m~2, with a mean value of 3.43 kg/m~2 in the 0-100-cm soil layer. Both biomass-and soil-carbon stocks had an increasing tendency corresponding to the altitudinal gradient. A significantly negative correlation was found between soil-carbon stock and mean annual temperature, with further better correlations between soil-and biomass-carbon stocks, and mean annual precipitation. Furthermore, soil carbon was found to be positively correlated with soil-silt and-clay content, and negatively correlated with soil bulk density and the volume percent of gravel. It can be concluded that variations in soil texture and climate condition were the key factors influencing the altitudinal pattern of carbon stocks in this desert-grassland ecosystem. Thus, by using the linear-regression functions between altitude and carbon stocks, approximately 4.18 Tg carbon were predicted from the 1,260 km~2 of desert grasslands in the study area.
英文关键词	altitudinal gradient soil organic carbon biomass carbon soil bulk density desert grasslands
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6357951
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336029
作者单位	Yang Rong, Linze Inland River Basin Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Key Laboratory of Ecohydrology of Inland River Basin, Chinese Academy of Sciences, Gansu 730000, China.; Kong Junqia, Linze Inland River Basin Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Key Laboratory of Ecohydrology of Inland River Basin, Chinese Academy of Sciences, Gansu 730000, China.; Du Zeyu, Linze Inland River Basin Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Key Laboratory of Ecohydrology of Inland River Basin, Chinese Academy of Sciences, Gansu 730000, China.; Su Yongzhong, Linze Inland River Basin Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Key Laboratory of Ecohydrology of Inland River Basin, Chinese Academy of Sciences, Gansu 730000, China.
推荐引用方式 GB/T 7714	Yang Rong,Kong Junqia,Du Zeyu,et al. Altitude pattern of carbon stocks in desert grasslands of an arid land region[J],2018,10(5):404-412.
APA	Yang Rong,Kong Junqia,Du Zeyu,&Su Yongzhong.(2018).Altitude pattern of carbon stocks in desert grasslands of an arid land region.Sciences in Cold and Arid Regions,10(5),404-412.
MLA	Yang Rong,et al."Altitude pattern of carbon stocks in desert grasslands of an arid land region".Sciences in Cold and Arid Regions 10.5(2018):404-412.