镉、铅对黄瓜种子发芽及幼苗生长的影响

研究了重金属镉、铅对黄瓜种子发芽、幼苗生长和根系生长的影响。结果表明：两个品种黄瓜种子的发芽、芽和根鲜质量等指标均随镉、铅处理浓度的增加而降低；总根长、根系表面积均随处理浓度的增加而降低，在低浓度下根系平均直径随处理浓度的增加而增大，高浓度严重抑制根系的生长；镉对黄瓜种子发芽的影响要大于铅，两个黄瓜品种对镉、铅的耐性有一定差异，豫艺201对镉、铅的耐受性要强于江蔬露丰。

Effects of Cd,Pb on Seed Germination and Seedling Growth of Cucumber

Effects on seed germination,seedling growth and root morphology in cucumber were studied by treatments of Cd,Pb. The results showed that the seed germination indices,shoot and root fresh weight of cucumber decreased with increasing concentration of Cd、Pb.The total root length、total surface area of cucumber roots were decreased with increasing concentration of Cd,Pb also.the average diameter of cucumber roots were increased with increasing concentration of Cd,Pb under the low consistence, but were decreased obviously under the high consistence.The single effect of Cd on cucumber seed germination and roots was obvious than that of Pb．‘Yuyi201’ cucumber was more tolerant to Cd and Pb than ‘Jiangshulufeng’ cucumber.