【摘要】 采用根垫法研究了不同生长时期的玉米根际土壤中铜、镉、铅、锌和铬的形态变化。结果表明 ,玉米生长 1 0 0d内不同重金属的形态变化有显著差别。交换态铜 ,碳酸盐态铜和锌 ,铁锰态铜、铅和铬 ,有机态铜、铅和铬都有明显变化。在 1 0 0d生长期间 ,不同重金属在根际土壤中的相对变化有较大幅度的波动。植物吸收主要影响根际土壤交换态铜和碳酸盐态铜和锌的变化 ,对镉和铅形态变化影响不大。更多还原

【Abstract】 Changes in fractionation of copper, cadmium, lead, zinc and chromium in the rhizosphere of maize during a period of 100 days were investigated using rootmat box. It was shown that there were significant changes in all forms of copper and cadmium and some forms of zinc and lead. The changes varied in direction and magnitude during the experimental period. Uptake of plant remarkably influenced exchangeable copper and carbonate bound copper and zinc.更多还原