干旱区生态环境知识资源中心(Arid): 1980s-2010s内蒙古草地表层土壤有机碳储量及其变化

Arid

	1980s-2010s内蒙古草地表层土壤有机碳储量及其变化
其他题名	Topsoil organic carbon storage and its changes in Inner Mongolia grassland from the 1980s to 2010s
	戴尔阜 1; 翟瑞雪 1; 葛全胜 1; 吴秀芹 2
来源期刊	地理学报
ISSN	0375-5444
出版年	2014
卷号	69 期号:11 页码:1651-1660
中文摘要	以我国内蒙古草原为研究区域,结合1982-1988年第二次土壤普查资料以及2011-2012年实地考察数据,构建了基于遥感数据和土壤数据的区域表层土壤有机碳储量估算方法,对研究区1980s 和2010s 表层土壤有机碳储量、空间分布特征及其变化进行研究,结果表明:(1)1980s、2010s 内蒙古草地表层土壤(0~20 cm)有机碳储量分别为2.05 Pg C、2.17 Pg C,土壤有机碳密度约为3.48 kg C·m~(-2)、3.69 kg C·m~(-2),其空间分布上呈现从草甸草原、典型草原、荒漠草原逐渐降低的特征;(2)1982-2012年间,内蒙古草地表层土壤有机碳储量略有增加,但增加幅度较小,其中草甸草原和典型草原表层土壤有机碳储量增加,荒漠草原则表现为减少。研究结果将为研究区因地制宜地采取固碳措施,实现草地可持续管理提供科学参考。
英文摘要	Soil carbon sequestration and potential has been a focal issue in global carbon research. Under the background of global change, the estimation of the extent well as its change of soil organic carbon (SOC) storage is of great importance. Based on soil data from the second soil survey of China and field survey during 2011-2012, this paper studied spatial distribution and changes of topsoil (0- 20 cm) organic carbon storage in Inner Mongolia grassland between the 1980s and 2010s, by using the regression relation between soil data and remote sensing data. The results showed that (1) the SOC storage values in Inner Mongolia grassland in the 1980s and 2010s were estimated to be 2.05 and 2.17 Pg C, with an average density of 3.48 and 3.69 kg C · m~(- 2), respectively. The SOC storage was mainly distributed in the typical steppe and meadow steppe, which accounted for over 98% of the total. The spatial distribution showed a decrease trend from the meadow steppe, typical steppe to the desert steppe, corresponding to the temperature and precipitation gradient. (2) SOC variations during 1982-2012 were estimated to be 0.12 Pg C, at 7.00 g C· m~(-2)· yr~(-1), which did not show a significant change. This indicates that SOC storage in grassland ecosystem of Inner Mongolia remained relatively stable over this period. However, topsoil organic carbon of different grassland ecosystems showed different trends of carbon source/sink during the past three decades. Meadow steppe and typical steppe, as a carbon sink, had sequestered at 0.15 and 0.03 Pg C, respectively, while desert steppe, as a carbon source, had lost 0.06 Pg C. It is concluded that SOC storage in grassland ecosystem may respond differently to climate change, which is related to vegetation type, regional climate type and grazing intensity. These results will provide references for decision makers to find proper resolutions to protect grassland soil resource.
中文关键词	表层土壤 ; 有机碳储量 ; 气候变化 ; 区域差异 ; 内蒙古草原
英文关键词	surface soil organic carbon storage climate change regional differences Inner Mongolia grassland
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MULTIDISCIPLINARY SCIENCES
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:5288083
来源机构	中国科学院地理科学与资源研究所 ; 北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230931
作者单位	1.中国科学院地理科学与资源研究所, 中国科学院陆地表层格局与模拟重点实验室, 北京 100101, 中国; 2.北京林业大学水土保持学院, 北京 100083, 中国
推荐引用方式 GB/T 7714	戴尔阜,翟瑞雪,葛全胜,等. 1980s-2010s内蒙古草地表层土壤有机碳储量及其变化[J]. 中国科学院地理科学与资源研究所, 北京林业大学,2014,69(11):1651-1660.
APA	戴尔阜,翟瑞雪,葛全胜,&吴秀芹.(2014).1980s-2010s内蒙古草地表层土壤有机碳储量及其变化.地理学报,69(11),1651-1660.
MLA	戴尔阜,et al."1980s-2010s内蒙古草地表层土壤有机碳储量及其变化".地理学报 69.11(2014):1651-1660.