乙酰甲胺磷和汞单一及复合污染对黄瓜发芽及幼苗生长的影响

有机磷农药和重金属是目前我国土壤中较常见的污染物。本文以黄瓜种子为供试作物,研究了重金属汞与农药乙酰甲胺磷单一污染及复合污染对其发芽率以及幼苗生长的毒害效应。结果表明,Hg2+与乙酰甲胺磷单一污染及复合污染对黄瓜种子的发芽率、芽长和根伸长的生态毒性敏感程度依次为:根伸长>芽长>发芽率,Hg2+与乙酰甲胺磷单一污染及复合污染对黄瓜幼苗的毒害效应均较明显。复合污染对黄瓜种子发芽指标和幼苗生长的抑制效应表现为协同作用,其结果是复合污染的整体生态毒性效应增强。研究结果为进一步研究农药和重金属复合污染的生态毒性提供基础资料。

Individual and Combined Effects of Hg2+ and Acephate on Cucumber Seed Germination and Seedling Growth

This paper investigated the eco-toxicity effects of single pollution and combined pollution of Hg²⁺ and acephate on seed germination rate and seedling growth of cucumber. The results indicated that the eco-toxicity sensibility follows the order of root elongation > shoot elongation > germinating rate, which was the result of single pollution and combined pollution of Hg²⁺ and acephate. The eco-toxicity effects were all obvious for both single pollution and combined pollution of Hg²⁺ and acephate on cucumber seedlings. It was synergic effects of inhibition on seed germination rate and seedling growth when Hg²⁺ and acephate were combined. As a result, the whole eco-toxicity effects increased in combined pollution.