摘要
各土壤微量元素的形态分布特性有相似的规律，每个微量元素的各种形态都可以根据其对植物的有效性划分为两组．第一组形态分布百分率与植物有效性指数呈显著或极显著相关．第二组则呈显著或极显著负相关．因而第一组的形态为主要的有效养分源，第二组的形态很难为植物提供有效养分．减少相应元素转化成为第二组的形态和增加第一组各形态的储备容量是调节和控制土壤营养的重要措施．
This paper reports on the distribution of various fractions of Zn, Fe, Cu and Mn in soil and their availability to plant.Similar characteristics were found in morphological distribution of the elements. various fractions of each element were divided into two groups based on their availability to plant The correlation between the elements morphological distribution and plant availability indexes indicated a significant or an extremely significant positive correlation for group Ⅰ but a significant or an extremely significant negative correlation for group Ⅱ. Therefore, the fractions in group Ⅰ were primely pools of available nutrients, while those in group Ⅱ hardly provide available nutrient for plant. Decreasing the transformation of corresponding element into fraction of Group Ⅱ and increasing the storage capacity of various fractions of group Ⅰwere the important managmental measures to regulate and control soil nutrients.
关键词
养分有效性
分布
土壤
锌
铁
铜
锰
形态
nutrient availability, distribution, morphological fractions of Zn, Fe, Cu and Mn
