外源痕量Zn进入土壤迁移转化的过程

采用放射性核素示踪法和分级提取相结合的技术，研究了外源痕量Ｚｎ（６５Ｚｎ）进入土壤迁移转化的过程．发现褐土中的６５Ｚｎ在初始阶段其交换态和碳酸盐结合态最多，残余态最少；２周后碳酸盐结合态也大量转化为结晶氧化铁结合态和残余态；４个月后氧化锰结合态和结晶氧化铁结合态明显向残余态转化；６个月后仍有大量存在于较易变动的碳酸盐结合态和非结晶氧化铁结合态中．

Translocation and transformation of supplemented trace Zn in soil

The translocation and transformation of supplemented trace Zn in drab soil is studied with radioactive isotope tracer and chemical fractional extraction methods. It is found that at initial stage, most of soil 65Zn is in exchangeable and carbonate bound forms, and less in residual form. In the following 2 weeks, carbonate bound form is largely transformed into CFeOX and RES forms. After 4 months, MnOX and CFeOX forms are tended to transform into RES form. 6 months later, the bulk of 65Zn is still in the labiler CARB and AFeOX forms.