针对冶炼厂排放污水中同时含有铜、砷的实际情况，通过向土壤单一或复合添加一定量的铜、砷，以研究铜、砷对水稻生长和产量的影响以及使水稻减产时土壤铜、砷临界值。结果表明，水稻能从土壤中吸收、累积相当数量的铜、砷；拮抗作用是铜、砷对水稻交互影响的特征反应；土壤铜、砷临界值分别为９００和２５ｍｇ／ｋｇ。

In connection with the status of Cu and As in waste water drained by one smeltery the influence of Cu and As on growth and yield of rice and their harmful critical values in soil were researched by adding an amount of Cu and As to soil in single or in combination. Results showed that a relative amount of Cu and As in soil could be absorbed and
accumulated in rice. The antagonistic action was the characteristic reaction of Cu and As reciprocal influence on rice. The critical values of Cu and As in soil were 900 and 20 mg/kg. respectively.