红壤中腐殖酸对外源稀土形态的影响  

The Effects of the Humic Acids on the External Rare earth Elements in the Red Soil

作　　者：顾雪元 顾志忙[2] 胡俊其 王晓蓉[2] 戴乐美[3] 陈逸君[3] 

机构地区：[1]南京市环境监测中心站,江苏南京210093 [2]污染控制与资源化研究国家重点实验室,南京大学环境学院,江苏南京210093 [3]南京大学现代仪器分析中心,江苏南京210093

出　　处：《土壤通报》2002年第1期21-24,共4页Chinese Journal of Soil Science

基　　金：江苏省自然科学基金项目 (BK990 34);国家自然科学基金项目 (2 9890 2 80 - 1 )资助

摘　　要：本实验研究了腐殖酸 (HumicAcid ,又名胡敏酸 )对外源稀土元素在土壤中形态分布的影响和各形态的有效性。结果发现 ,加入腐殖酸后 ,土壤中稀土的交换态和碳酸盐结合态含量降低 ,有机结合态含量上升 ,而且腐殖酸浓度与稀土有机结合态含量有良好的相关性 ,说明腐殖酸能够提高稀土元素在土壤中的固定性 。In this experiment, the effects of Humic Acid (HA) on the distributing and validity of external Rare Earth Elements (REEs) in the red soil were investigated. The results showed that after the HA adding to the soil, the exchangeable fraction and binding to carbonate fraction of REEs reduced, while the binding to organic matter fraction of REEs increased. The close relation of the concentration of HA with the binging to organic matter fraction of REEs was found. The results showed that HA could increase the fixity of external REEs, and it also could decrease the valid fractions of REEs in the soil.

关 键 词：稀土元素 腐殖酸 形态 红壤 分布 有效性 

分 类 号：S155.25[农业科学—土壤学] S153.622[农业科学—农业基础科学]