再生水及重金属Pb/Cd对种子萌发和成苗的影响  

Effects of Reclaimed Water and Heavy Metals Pb/Cd on Seed Germination and Seedling

作　　者：王文萍 黄占斌[1,2] 毕涛[1] 李勇[1] 景生鹏[1] 杨静超[1] 郜洁[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]河南大学生命学院,河南开封475001

出　　处：《灌溉排水学报》2010年第2期81-84,共4页Journal of Irrigation and Drainage

基　　金：国家863项目(2006AA100205)

摘　　要：为了比较再生水及重金属铅(Pb)、镉(Cd)对作物种子萌发和成苗的影响,通过水培模拟实验,研究再生水,Pb、Cd单一和复合处理对小麦种子萌发和成苗的影响。结果表明,再生水对小麦种子萌发和根系生长具有显著促进作用。低浓度Pb和Cd可促进种子萌发和根系生长,而中、高浓度表现出抑制作用。根伸长抑制率与重金属浓度呈正相关,以复合处理最为明显。可以根伸长抑制率作为重金属Cd、Pb污染程度的评价指标。重金属复合污染对根伸长的生态毒性效应增强,可能因为重金属的协同作用。For comparing the effect of reclaimed water and heavy metals lead（Pb）,cadmium（Cd） on crop seed germination and seedling,it was researched that secondary reclaimed water and Pb,Cd（single and complex treatment） had an influence on seed germination and seedling of wheat by experiment with solution culture.The results showed that reclaimed water had promotion effect on seed germination and root growth of wheat distinctly.Low concentrations of Pb and Cd can promote seed germination and root growth,but the inhibitory effect of the middle and high concentrations will be appeared.There was a positive correlation between inhibition rate of root elongation and concentration of metal,and the most evident to complex pollution.Inhibition rate of root elongation can be as an evaluation index for pollution degree of Pb and Cd.The ecological toxicity on root elongation of complex pollution is higher than that of single metal Pb or Cd,and the major mechanism may be the synergism function.

关 键 词：再生水 Pb、Cd 小麦 种子萌发 根伸长抑制率 

分 类 号：S273.5[农业科学—农业水土工程] X1[农业科学—农业工程]