腐殖酸对土壤汞、镉、铅植物可利用性的影响  

Effects of Phyto-availability on Hg, Cd, Pb in Soil by Humus

作　　者：李静[1] 陈宏[1] 陈玉成[1] 杨学春[1] 

机构地区：[1]西南农业大学资源环境学院,重庆400716

出　　处：《四川农业大学学报》2003年第3期234-236,240,共4页Journal of Sichuan Agricultural University

基　　金：重庆市科委攻关项目。

摘　　要：研究了腐殖酸对污染土壤中Hg、Cd、Pb活性的影响及其在植物体内的积累效应。分析表明:腐殖酸能增加土壤Hg、Pb的残留量,减少Hg、Pb的植物可利用性。腐殖酸能有效地抑制Hg在植物叶中的富集,在施用量为6 0t/hm2时植物体Hg含量下降了67 0%,施用量为3 0t/hm2时植物体Pb含量下降了23 0%。Pot experiments were carried out to study the effect and accumulation in plants of humus on the ameliouation of Hg, Cd, Pb polluted soil. The results show that humus can cause increase in residual Hg, Pb and reduce phytoavailability of Hg, Pb. Humus can restrain Hg accumulation in the part of leaf effectively. The content of Hg in plants reduces by 670% after 60?t/hm2 humus is added, the content of Pb in plants reduces by 230% after 30?t/hm2 of humus is used.

关 键 词：腐殖酸 污染土壤 可利用性 调控 

分 类 号：X131.3[环境科学与工程—环境科学] X53