都匀市土壤微量元素全量及有效态研究

Researches on Total Contents and Effective State of Trace Elements of Soil in Duyun

通过对都匀市区及其周围460km^2内79件土壤样品的测定分析,基本查明了各类土壤中硼、钼、锌、铜、锰元素的含量丰缺及分布情况。与我国土壤和世界土壤的平均值比较,各元素全量的平均含量在黄壤、水稻土和石灰土中属中等水平,在潮土中属偏低水平,在紫色土中除锰元素偏低外,其余元素也属中等含量水平。铜、锌、锰元素有效态在各类土壤中均高于临界值,钼元素部分低于临界值,硼元素均低于临界值。钼与锰、铜与锌的全量及有效态关系密切。各元素有效态与其全量均具有一定的正相关关系。

Seventy-nine soil samples were collected in Duyun and its surrounding area of 460km2 and analyses have been made of the total content and the effective state of B, Mo, Zn, Cu, Mn, of every sample. It is shown that compared with the average value of soil of our country and that of the world, the average value of the total content of every element is on a medium level in yellow soil, paddy soil and lime soil, and on a lower level in moist soil. In purple soil the average value of the total content of Mn is on a lower level, but those of the others are on a medium level. In various kinds of soil, the effective state content of Cu, Zn, Mn is higher than their critical values, with that of part of Mo and that of B lower than of B lower than their critical values. According to the assorted analyses of the elements and on the correlating coefficient level of O. 4, the elements with total content can be divided into three kinds : 1. B; 2. Mo, Mn; 3. Cu, Zn. And on the correlating coefficient level of O. 3, the effective state elements can be divided into two kinds : 1. B, Zn, Cu; 2. Mo, Mn. Moreover, the effective state content of every element has certain correlating relationships with the elements with total content.