有机物质对土壤镉有效性的影响研究综述

被引:112
作者
余贵芬
蒋新
孙磊
王芳
卞永荣
机构
[1] 中国科学院南京土壤研究所
[2] 中国科学院南京土壤研究所 南京
关键词
低分子有机酸; 腐殖酸; 镉; 活性;
D O I
暂无
中图分类号
X131.3 [土壤污染化学];
学科分类号
082803 ; 0903 ;
摘要
土壤中的低分子有机酸和腐殖酸对镉的有效性有重要作用。根系分泌的低分子量有机酸能提高土壤镉的可提取率、移动性和生物有效性 ,但是更大分子量的有机酸 EDTA却抑制植物对镉的吸收。腐殖酸促进土壤镉的溶解性 ;因腐殖酸组分和环境条件 ,腐殖酸能够促进也能抑制土壤镉活性 ,因此有必要深入研究影响腐殖酸固定镉的因素 ,以达到利用有机质抑制土壤镉活性的目的。
引用
收藏
页码:770 / 776
页数:7
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