邻苯二胺对外源铜在红壤中形态影响的研究

采用温室水稻盆栽实验方法，研究了有机污染物邻苯二胺对外源铜在红壤中形态的影响。结果表明，在外源铜浓度较低的情况下，邻苯二胺的加入并没有显著影响土壤中各种形态铜含量的变化。但是，当外源铜浓度较高时，邻苯二胺却显著降低了土壤中交换态和碳酸盐结合态铜的含量，同时增加了土壤中铁锰氧化物结合态铜和有机结合态铜的含量。另外，根据土壤中铜的4种不同形态与水稻地上部中铜含量的相关分析发现，在相同外源铜水平条件下，水稻中的铜含量与土壤中的交换态铜和碳酸盐结合态铜呈显著正相关，与铁锰氧化物结合态和有机结合态铜则呈显著负相关。

Effects of External-Source Copper Fraction in Red Soil in the Presence of o-Phenylenediamine

This paper aims to study external -s ource Cu fraction in red soil in the pr esence of o -phenylenediamine.The r esults indicated that the external -source Cu fraction,loaded with low concent ration of Cu,did not change obviously in the presence of o -phenylenediamine,whereas the effe ct was significant at high copper load rate,in which the exchangeable and carbonate -binding Cu decreased and the forms of Fe -Mn oxid es bound and organic matter bound Cu i ncreased with increasing o -phenyle nediamine concentration.Moreover,the copper concentration in rice straw was positively correlated with exchangeab le and carbonate bound Cu in soil.In contrast,it was negative ly correlated with Fe -Mn oxides and o rganic matter Cu simultaneously.