干旱区生态环境知识资源中心(Arid): 青海湖流域土壤可蚀性K值研究

Arid

	青海湖流域土壤可蚀性K值研究
其他题名	Soil Erodiable K in the catchment of Qinghai Lake
	刘吉峰 1; 李世杰 1; 秦宁生 2; 于守兵 1
ISSN	1000-6060
出版年	2006
卷号	29 期号:3 页码:321-326
中文摘要	以土壤亚类为基础,依据青海省第二次土壤普查资料建立了青海湖流域土壤亚类理化性质数据库.使用Wischmeier建立的通用方程计算土壤可蚀性K值,利用三次样条函数插值方法转换不同粒径标准的土壤质地;分别使用土壤有机质含量和土壤最小饱和水力传导率来确定土壤的结构和渗透级别.根据计算结果,建立了青海湖流域土壤可蚀性的分级指标.结果显示,中等和高等可蚀性K值的土壤面积分别占流域土壤总面积的72.1%和15.5%,土壤易于侵蚀.使用Arc/Info对青海湖流域土壤地图进行数字化得到值的K空间分布图,分析了流域可蚀性K值的分布规律及其土壤沙化原因,这对青海湖流域水土保持及流域长期规划具有重要意义.
英文摘要	The results indicate that the areas of medium erodibility soil and higher erodibility soil make 72. 1% and 15. 5% respectively of the whole area of the catchment, which shows that potential soil erosion could be quite strong. The characteristics of spatial distribution of soil erodibility are listed as follows: (l)The area with higher erodibility is mainly concentrating around Qinghai Lake with the chestnut soil, and some small areas in high mountain in the northwestern part of the catchment; (2) the lower terraces and the lake-side plain are of the lower erodibility K values. The main soil types are meadow bog and marshy soil; (3) the areas in the north and east sides of the lake have been seriously desertificated. In addition, erodibility K value has seasonal and yearly variation with the ground conditions. Higher erodibility K value and overgrazing as well as unreasonable cultivation could be the main reasons for the strong soil erosion and desertification. Ecosystem in this region is very vulnerable at the present, and more attention should be paid to these problems to prevent the ecosyetem from deterioration.
中文关键词	土壤质地转换 ; 可蚀性K值 ; 青海湖流域
英文关键词	erodibility K value soil texture transition the catchment of Qinghai Lake
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:2412432
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/219677
作者单位	1.中国科学院南京地理与湖泊研究所, 南京, 江苏 210008, 中国; 2.青海省气候资料中心, 西宁, 青海 810001, 中国
推荐引用方式 GB/T 7714	刘吉峰,李世杰,秦宁生,等. 青海湖流域土壤可蚀性K值研究[J],2006,29(3):321-326.
APA	刘吉峰,李世杰,秦宁生,&于守兵.(2006).青海湖流域土壤可蚀性K值研究.,29(3),321-326.
MLA	刘吉峰,et al."青海湖流域土壤可蚀性K值研究".29.3(2006):321-326.