甘肃河西西部地区土壤矿质成分的分布及其变异

DISTRIBUTION ADN VARIATION OF SOIL MINERAL COMPOSITION IN WESTERN HEXI CORRIDOR OF GANSU PROVINCE

本文通过对土壤剖面中的矿物质成分分析，计算出了各土类间元素含量的变异系数。结果表明，各土类的烧失量、ＣａＯ的高变异，烧失量、ＣａＯ和ＭｇＯ三者的相对比例，硅铝铁分子比率及风化淋溶系数等，反映了该区土壤形成特点及发育程度。

In this paper,through mineral composition analysis of soil profile,the variation coefficients of element contents among various soil types were calculated.The results showed thatignition losses and CaO contents of different soil types varied greatly; the relative ratio among ignition loss,CaO and MgO,the iron-alumina ratio as well as the weathering-eluviation coefficient etc. reflected the soil-forming characteristics and soil development degress in the region.