干旱区生态环境知识资源中心(Arid): 荒漠化重建地区土壤有机碳动态研究

Arid

	荒漠化重建地区土壤有机碳动态研究
其他题名	Dynamic Analysis of Soil Organic Carbon in Desertification Rebuilding Area
	程淑兰 1; 欧阳华 1; 牛海山 2; 王琳 1; 田玉强 1; 张锋 1
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2004
卷号	18 期号:3 页码:74-77,89
中文摘要	土壤有机碳(Soil organic carbon，SOC)是反映土地荒漠化的重要指标。本研究以陕西省榆林市为例，开展小区域沙漠化重建地区SOC动态的实证研究。SOC数据来源于1982年土壤普查和2003年重复采样，土样的采集、分析和统计方法分别为土钻取土法、重铬酸钾氧化法、吸管法和面积加权法。研究结果表明：SOC含量与粗砂粒显著负相关(R=-0．50，a＝0．01)，与粘粒显著正相关(R=-0．45，a＝0．05)，20年间土壤颗粒细化趋势比较明显；20年间原始剖面、1 m深和耕层SOC含量、密度和储量都有不同程度的增加，其中对人类活动最敏感的耕层土壤变化最显著，SOC含量、密度和储量分别增加了0．55 g／kg，0．15 kg／m~2，10．07 GgC。该研究结果表明防风固沙、可持续性农耕等措施会卓有成效地促进土地沙漠化的恢复和重建。
英文摘要	Soil organic carbon (SOC) is an important indicator to measure the land desertification. Yulin city is taken as a case to study the SOC dynamics of desertification rebuilding area in a local scale. The data source based on the second soil survey in year of 1982 and repeated soil sampling in year of 2003, and the methods for sam pling, determining and analyzing of SOC are auger hole method, K_2Cr_2O_7 oxidation method, area-weigh method respectively, and micro-pipette method is used to determine soil texture. The main conclusions are as follows; SOC content is much correlative to soil texture, it is negative correlation to coarse silt( R = - 0. 50, a = 0. 01) and positive correlation to clay (R = - 0. 45, a = 0. 05) ; The content, density and storage of SOC in original pro file, 1 m depth and arable layer increase greatly during the 20 years, among which the arable layer is most re markable result in direct and indirect mankind activities; The content, density and storage of arable layer SOC are increased by 0. 55 g/kg,0. 15 kg/m~2,10. 07GgC respectively, which representing rate of increase of 21. 00%, 33. 02% ,33. 02% correspondingly. The results show that tree and grass planting, return plantation to woodland or pasture, sustainable agricultural managements and other countermeasures will promote desertification reverse significantly, which will helpful to increase the amount of SOC and carbon sequestration in desertification area.
中文关键词	土地沙漠化
英文关键词	soil organic carbon (SOC)
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:1627902
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205481
作者单位	1.中国科学院地理科学与资源研究所, 北京 100101, 中国; 2.中国科学院研究生院, 北京 100039, 中国
推荐引用方式 GB/T 7714	程淑兰,欧阳华,牛海山,等. 荒漠化重建地区土壤有机碳动态研究[J]. 中国科学院地理科学与资源研究所,2004,18(3):74-77,89.
APA	程淑兰,欧阳华,牛海山,王琳,田玉强,&张锋.(2004).荒漠化重建地区土壤有机碳动态研究.水土保持学报,18(3),74-77,89.
MLA	程淑兰,et al."荒漠化重建地区土壤有机碳动态研究".水土保持学报 18.3(2004):74-77,89.