【摘要】 研究了两种相同价态的重金属离子 Cd2＋和 Ni2＋在不同浓度下对小麦种子萌发及其幼苗生长的毒害作用。实验结果表明，随着 Cd2＋和 Ni2＋浓度的增加，小麦种子的发芽数量、速度和质量，根和芽的生长速度及萌发种子的α－淀粉酶活性均降低。浓度较低时， Cd2＋的毒性大。反之， Ni2＋的毒性大。推测 Cd2＋和 Ni2＋影响小麦生长发育的机理是不同的。更多还原

【Abstract】 Phytotoxicity of both cadmium and nickel on wheat was conducted with an experiment. It has been found that germinating rate, index, vitality index, growth of wheat seedlings and theα－ amiylolytic activity in germinating seeds were decreased significantly by Cd2＋ at 0.05- 1.0 mmol· L－ 1 and Ni2＋ at 1.0 mmol· L－ 1, respectively. In addition, it was discovered that phytotoxicity of Cd2＋ is stronger than Ni2＋ at lower concentration, but phytotoxicity of Ni2＋ is stronger than Cd2＋ at higher concentration.更多还原