根分泌的有机酸对土壤磷和微量元素的活化作用

应用生态学报 ›› 1999, Vol. 10 ›› Issue (3): 379-382.

根分泌的有机酸对土壤磷和微量元素的活化作用

陆文龙, 曹一平, 张福锁

中国农业大学资源与环境学院, 北京 100094

收稿日期:1997-05-04 修回日期:1998-05-06 出版日期:1999-05-25 发布日期:1999-05-25
通讯作者: 陆文龙,男,35岁,博士,副研究员,主要从事植物营养、土壤改良、农业环境方面的研究,发表论文30篇.E-mail:wllu@shell.tjvan.com.cn E-mail:wllu@shell.tjvan.com.cn
基金资助:
国家自然科学基金资助项目(39790100).

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

Lu Wenlong, Cao Yiping, Zhang Fusuo

College of Resources and Environment, China Agricultural University, Beijing 100094

Received:1997-05-04 Revised:1998-05-06 Online:1999-05-25 Published:1999-05-25

摘要/Abstract

摘要： 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.

关键词: 养分胁迫, 不同生态型植物, 有机酸分泌, 养分活化, 林窗, 粗木质残体, 养分, 苔藓, 高山森林

Abstract: As a kind of adaptive mechanism, many plants can increase organic acid exudation in response to nutrient stress, especially Pdeficiency. 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 Pdeficiency 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.

Key words: Nutrient stress, Different ecotype plants, Organic acids exudation, Nutrient mobilization, bryophyte, coarse woody debris, gap, alpine forest., nutrient

陆文龙, 曹一平, 张福锁. 根分泌的有机酸对土壤磷和微量元素的活化作用[J]. 应用生态学报, 1999, 10(3): 379-382.

Lu Wenlong, Cao Yiping, Zhang Fusuo . Role of root exuded organic acids in mobilization of soil phosphorus and micronutrients[J]. Chinese Journal of Applied Ecology, 1999, 10(3): 379-382.

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