寒温带兴安落叶松林冻土Cu、Pb元素分布特征的研究

Study on Distribution Characteristics of Cu,Pb in the Frozen Earth in Larix gmelinii Forest in Frigid and Temperate Zone

为研究大兴安岭北部林区多年冻土Cu、Pb元素分布特征，文章利用X射线荧光光谱法，对冻土36个样点144个样品进行了Cu、Pb元素含量测定。结果表明，cu元素含量范围在12．0～19．0mg／kg之间，Pb元素含量范围在14．0～25．0mg／kg之间。在不同冻土层深度、不同坡位、不同坡向上，其冻土Cu、Pb元素含量差异显著，其对冻土Cu、Pb元素含量影响由大到小排列顺序为土层深度〉坡向〉坡位。

In order to study the Cu and Pb elements background value of permafrost in the north of the Daxinganling Mountains. There are 144 samples in 36 plots were tested with x rays fluorescent spectrom- etry. The content of the Cu was from 12.0 to 19.0 mg/kg and the contend of the Pb was from 14.0 to 25.0 mg/kg. It showed that there was significant difference in the content of the Cu and Pb in the pertnafrost , with the different soil depth, slope position and slope aspect , and their effect on content was soil depth 〉 slope aspect 〉 slope position.