重金属复合污染对小麦种子根活力的影响

应用生态学报 ›› 2003, Vol. ›› Issue (4): 577-580.

重金属复合污染对小麦种子根活力的影响

陈素华, 孙铁珩, 周启星

中国科学院沈阳应用生态研究所, 沈阳 110016

收稿日期:2002-07-05 修回日期:2002-09-02
通讯作者: 陈素华,女,1974年7月生,博士生,主要从事环境污染生态工程和环境污染毒理学研究,发表论文10余篇.E-mail:trensuhua@hotmail.com.
基金资助:
国家重点基础研究发展规划顶目(G1999011808);中国科学院研究生科学与社会实践资助专项.

Effects of combined pollution of heavy metals on root vitality of wheat seeds

CHEN Suhua, SUN Tieheng, ZHOU Qixing

Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China

Received:2002-07-05 Revised:2002-09-02

摘要/Abstract

摘要： 应用二次回归旋转设计法,以小麦种子为材料,研究了水培条件下重金属复合污染对其根生长及活力的影响;借助回归分析建立了相应的数学模型,分析了Cu、Zn、Cd和Pb4种重金属对根活力的毒性、两两重金属间的联合作用以及各重金属的边际毒性效应.结果表明重金属对根活力的影响顺序为Pb>Cu>Cd>Zn;Cu与Cd、Cu与Zn、Zn与Cd以及Cd与Pb元素间的互作效应显著;在0～20mg·L^-1浓度范围内,Cu和Zn两元素在最小浓度时的边际效应值最大,Cd和Pb两元素的边际效应最大值却出现在最高浓度处.

关键词: 重金属, 复合污染, 二次回归旋转设计, 联合作用, 水蚀风蚀交错区, 坡度, 产流, 产沙, 退耕封育, 植被利用强度

Abstract: The combined effects of Cu, Cd, Pb and Zn on the growth and activity of the seminal roots of wheat (Triticum aestivum) were studied by the method of quadratic regression revolution design. The mathematical models describing the above relations were established. As for the toxicity to the root vitality, their single effects, marginal utility and combined effects between two heavy metals were analyzed. The results showed that Pb had the most important effect on the activity of root,and then,Cu,Cd and Zn in sequence. The interaction between Cu and Cd, Cu and Zn, Zn and Cd, Cd and Pb had great effects on the activity of seminal roots. Furthermore, among the concentration range of 0 to 20 mg稬^-1, as for Cu and Zn, the lowest density had the biggest marginal utility, while Cd and Pb had the biggest ones at the highest density.

Key words: Heavy metals, Combined pollution, Quadratic regression revolution design, Combined effects, wind-water erosion crisscross region, slope gradient, runoff yield, sediment yield., grain for green, utilization intensity of vegetation

中图分类号:

X171

陈素华, 孙铁珩, 周启星. 重金属复合污染对小麦种子根活力的影响[J]. 应用生态学报, 2003, (4): 577-580.

CHEN Suhua, SUN Tieheng, ZHOU Qixing . Effects of combined pollution of heavy metals on root vitality of wheat seeds[J]. Chinese Journal of Applied Ecology, 2003, (4): 577-580.

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