摘要
根-土界面是物质交换最频繁的特殊微型生态区域,其pH、Eh和根系分泌物是决定这个微域环境性质变化的三大重要因素,其对镉(Cd)等重金属的吸收、转化和迁移等生态化学行为及毒理效应起着决定性的作用.本文就十几年来有关Cd在根-土界面pH、Eh和根系分泌物变化影响下的生态化学行为、根-土界面Cd的生态毒理效应(包括微生物生态毒理效应和酶的生态毒理作用)研究进展进行了综合论述,指出了目前研究中存在的不足,并就今后需要进一步解决的科学问题提出了建议.
Many active substances such as organic acids and enzymes excreted by living plant roots could induce a great difference of Eh and pH values between root-soil interface and non-rhizosphere soil, forming a special root-soil interface miniature environment. As a mini-type ecological area with most frequent exchanges of substances, root-soil interface plays a crucial role in their absorption, transformation, migration and coo-toxicological effects. In this paper, the coo-chemical behaviors of Cd in root-soil interface affected by the Change of pH, Eh and root secretion, and its eco-toxicological effects on microorganisms and enzymes in root-soil interface were reviewed, based on the related research advances in recent decade. The shortages in relevant fields were pointed out, and the scientific problems to be researched in the future were suggested.
出处
《应用生态学报》
CAS
CSCD
北大核心
2005年第8期1553-1557,共5页
Chinese Journal of Applied Ecology
基金
国家杰出青年科学基金项目(20225722)
国家自然科学基金重点资助项目(20337010)
关键词
镉
根-土界面
生态化学行为
生态毒理效应
Cadmium, Root-soil interface, Eco-chemical behavior, Eco-toxicological effect
