京西山地棕壤和淋溶褐土饱和导水率的分析  

ANALYSIS OF SATURATED SOIL HYDRAULIC CONDUCTIVITY OF MOUNTAIN BROWN EARTH AND ELUVIAL CINNAMON SOIL IN BEIJING XISHAN

作　　者：马履一[1] 翟明普[1] 王勇[2] 

机构地区：[1]北京林业大学资源与环境学院 [2]北京林业大学妙峰山林场

出　　处：《林业科学》1999年第3期109-112,共4页Scientia Silvae Sinicae

基　　金：国家"八五"科技攻关专题

摘　　要：导水率Ｋ（ｈｙｄｒａｕｌｉｃｃｏｎｄｕｃｔｉｖｉｔｙ）是表示孔隙介质透水性能的综合比例系数，即单位水力势梯度下水的通量密度或渗透流速。Ｋ值是土壤颗粒大小分布、固体物质的化学组成和土壤紧实度的函数。因此，对于不同的土壤或同一土壤的不同层次Ｋ值亦可能有差...Constant head method was used to measure saturated hydraulic conductivity(Ks)of 26 soil profiles between 100 to 1000m above sea level. The relationship between Ks and soil texture and soil bulk density, the regulation that Ks changes with soil depth, the difference of Ks between undisturbed and disturbed soil were analysed in this article. It was also pointed out in this article that the range of Ks in Beijing Xishan is between 1 3·10 -2 cm/min and 14 9·10 -2 cm/min;the value of Ks drops from 6 5·10 -2 cm/min to 3 7·10 -2 cm/min with the depth increasing; the value of Ks goes down with the increasment of content of clay particle; the value of Ks in undisturebed is two time larger than that of disturbed soil, but they were in the same quantify degree.

关 键 词：土壤 山地 棕壤 褐土 饱和导水率 土壤容重 

分 类 号：S152.72[农业科学—土壤学] S152.5[农业科学—农业基础科学]