根分泌的有机酸对土壤磷和微量元素的活化作用

在养分胁迫下，尤其是缺磷条件下，许多植物可通过增加有机酸的分泌，作为其适应机制．讨论了营养胁迫条件下不同生态型植物根系分泌有机酸的种类，分析了不同生态型植物分泌的有机酸种类和数量之间的差异．结果表明，在缺磷条件下植物根系所分泌有机酸的种类和数量与它们所处的土壤环境关系密切．在营养胁迫条件下植物根系分泌的有机酸具有活化土壤磷、微量元素和缓解Ａｌ毒的功能；对有机酸活化土壤养分，解Ａｌ毒可能的作用机制进行了论述

Role of root exuded organic acids in mobilization of soil phosphorus and micronutrients.

As a kind of adaptive mechanism, many plants can increase organic acid exudation in response to nutrient stress, especially P deficiency. This paper discussed the root exuded organic acids of different ecotype plants under nutrient stress. The kinds and amounts of root exuded organic acids under P deficiency were highly related to surrounding soil environment. The organic acids exuded by root under nutrient stress were able to mobilize soil phosphorus and micronutrients, and to relieve aluminum toxicity. The paper also discussed the possible mechanism of soil nutrient mobilization and aluminum detoxification.