五台山土壤环境背景值及其垂直分异规律

本文分析了五台山区土壤中Ｆｅ、Ｍｎ、Ｃｕ、Ｚｎ、Ｃｏ、Ｎｉ、Ｃｒ、Ｐｂ、Ａｓ等９种重金属元素的背景值及其垂直分异规律，结果表明：１、五台山区土壤中９种化学元素的含量均在中国和世界土壤含量范围之内，就平均含量而言：Ｃｒ、Ｐｂ低于中国、世界土壤的平均含量及地壳丰度；Ｆｅ低于世界土壤的平均含量而与中国土壤相近；Ｃｕ、Ｚｎ、Ｍｎ低于中国土壤而与世界土壤下限接近；Ｃｏ、Ｎｉ高于中国及世界土壤而低于地壳丰度；ＡＳ高于世界土壤而低于中国土壤。整体属清洁理想水平，达到了自然保护区的标准。２、五台山土壤中９种化学元素背景值的变异系数为１４．６２～４４．６７％。元素含量顺序为Ｆｅ＞Ｍｎ＞Ｚｎ＞Ｎｉ＞Ｃｒ＞Ｃｕ＞Ｃｏ＞Ｐｂ＞Ａｓ，这与中国及世界土壤中含量顺序不完全一致。３、在垂直分并规律上，总趋势是随海拔的升高，化学元素含量增高，但各元素的分异特征是不一致的；在土体内除Ｃｕ、Ｚｎ、Ｍｎ、Ｎｉ外，其它元素的垂直分异并不明显。

STUDY ON THE BACKGROUND LEVELS AND VERTICAL DISTRIBUTION IN SOILS OF WUTAI MOUNTAIN AREA

Background contents of 9 elements of different soil type were studied.The results showed: 1).Soil background levels for Cr,Ph,Fe were below word's averages;for Co,Ni were higher than Chinese and world’s average;for As was higher than world'saverage but below Chinese average;for Cu,Zn,Mn,were around the lower limits of the world’s averages;2).Variation confficients of the soil background contents in soil background content values were from 14.62% to 44.67%.The order of the element contents in soils was as follows:Fe>Mn>Zn>Ni>Cr>Co>Pb>As.3).Vertical distribution of elements in the soils was that tended increased with the increase of elevation,but every element was not same;except Cu,Zn,Mn,Ni,other elements have no obvious difference in soil profiles.