重金属Cu和Zn及其复合污染对小麦种子萌发和生长的影响重点讲义资料

重金属 Cu和 Zn 及其复合污染对小麦种子萌发和生长的影响摘要本文主要研究了Cu2+和 Zn2+及其复合污染对小麦种子萌发和生长的影响。以徐州当地种子公司处购买的小麦为材料，以去离子水培养为对照， 研究不同浓度 Cu2+，Zn2+及其复合对小麦种子萌发和幼苗生长的影响。结果表明单一因素试验时，低浓度 Cu2+和 Zn2+对小麦种子的萌发和生长有促进作用，高浓度 Cu2+和 Zn2+对小麦种子的萌发和生长有抑制作用。在研究复合作用时发现，在Cu2+，Zn2+复合浓度低时，对小麦的出芽率和幼苗生长有一定的促进作用，即 Cu2+，Zn2+浓度分别为 10mg/L，5mg/L 时，小麦种子萌发和生长情况最好。关键词 ：Cu2+，Zn2+，小麦，种子萌发，幼苗生长Abstract: This paper mainly presents a study of the effects of Zn2+ and Cu2+ and their combined pollution on Seed Germination and growth of wheat.Wheat was purchased from Xuzhou local . The effects of different concentrations on Seed Germination and seedling growth of wheat were studied by using water culture as control.The results showed that low concentrations of Cu2+ and Zn2+ could promote the seed germination and growth of wheat, and high concentrations of Cu2+ and Zn2+ could inhibit the seed germination and growth of wheat.In the study of composite effect found in Cu2+,Zn2+compound concentration is low, the wheat germination rate and seedling growth of a certain role in promoting, Cu2+, Zn2+ concentrations were 10mg/L,5mg/L, the wheat seed germination and growth of the best. Key words: Cu2+, Zn2+, wheat, seed germination, seedling growth 1. 前言重金属污染已日益成为人们关注的焦点，已成为当今污染面积最广， 危害最大的环境问题之一[1] 。我国受重金属污染的耕地面积近2000 万 hm2，约占总耕地面积的 1/5。由于对人类健康和社会可持续发展危害的严重性，现在已成为全球关注的问题[2] 。铜，锌元素对植物的生长是必不可少的微量元素，但是其浓度过大又会造成作物的毒害[3] 。笔者通过研究 Cu2+和 Zn2+及其复合污染对小麦种子萌发的影响，为小麦生产提供一定的科学依据。2 ...