镉在水稻根际的生物有效性

被引：34

作者：

刘文菊

张西科

尹君

刘玉双

张福锁

机构：

[1] 河北农业大学资环系!保定

[2] 保定市农广校!保定

[3] 中国农业大学植物营养系!北京

来源：

农业环境保护 | 2000年 / 03期

关键词：

水稻; 镉; 根际; 生物有效性;

D O I：

暂无

中图分类号：

X132 [环境分析化学];

学科分类号：

摘要：

综合介绍了水稻根际土壤中的 pH值、Eh值、有机质和微生物、其它金属元素及根分泌物等因素同镉的生物有效性之间的关系。提出水稻根系具有泌氧能力 ,使其根际微环境呈氧化状态。因而 ,土壤溶液中一些还原性物质被氧化 ,如Fe2 +、Mn2 +形成的氧化物在根表沉积成胶膜。胶膜及其根际环境对水稻吸收镉都有一定的影响。

引用

页码：184 / 187

页数：4

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