銅の水稲種子根伸長阻害作用の土壌溶液による軽減効果

概要

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Cupric chloride was dissolved in two kinds of soil solutions obtained with a centrifuge. their toxicity on the elongation of seminal roots of rice were compared with that of cupric chloride in distilled water. The results showed that the soil solutions effected a decrease in the toxicity of copper ; these was a clear difference in the strength of this effect between these two kinds of solutions. To clarify this mechanism, the two soil solutions were treated with activated carbon, ultrafilter, and ion-exchanged resin, and cupric chloride solutions were made with these treated soil solutions. The toxicity of copper in these solutions on seminal roots of rice was compared. The results showed that the organic compounds and nutrient elements ions in the soil solutions effected the decrease in the toxicity of copper and also showed that the strength of this effect depends on the amounts of these substances in the soil solutions.
1989-04-05