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

DOI	10.3724/SP.J.1226.2018.00404
	Altitude pattern of carbon stocks in desert grasslands of an arid land region
	Yang, Rong; Kong, JunQia; Du, Zeyu; Su, YongZhong
通讯作者	Yang, R
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	ESCI
WOS记录号	WOS:000457528800005
WOS关键词	SOIL ORGANIC-CARBON ; NORTHERN CHINA GRASSLANDS ; PRECIPITATION GRADIENT ; STORAGE ; CLIMATE ; NITROGEN ; TEXTURE
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/333274
作者单位	[Yang, Rong; Kong, JunQia; Du, Zeyu; Su, YongZhong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Linze Inland River Basin Res Stn, Lanzhou 730000, Gansu, Peoples R 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.