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土壤镉污染对苎麻的生长毒害效应
引用本文:王凯荣,周建林,龚惠群. 土壤镉污染对苎麻的生长毒害效应[J]. 应用生态学报, 2000, 11(5): 773-776
作者姓名:王凯荣  周建林  龚惠群
作者单位:中国科学院长沙农业现代化研究所农业生态试验站,长沙,410125
基金项目:中国科学院“九 .五”项目!(KZ951 B1 2 0 7 0 4 )
摘    要:通过微区定位试验 ,研究了土壤添加Cd对苎麻的生长毒害效应 .结果表明 ,高浓度Cd能够显著影响苎麻叶片中叶绿素总量及其组成 ,降低苎麻的光合生产力 .当土壤Cd浓度达到 14mg·kg-1时 ,苎麻地上部分生物产量降低 2 0 % ;Cd浓度达到 10 0mg·kg-1时 ,产量只有对照的一半 .影响苎麻经济产量的主导因子是有效分蘖数 .Cd对苎麻纤维品质的影响程度相对较小 .因此 ,将苎麻作为Cd污染区的替代作物栽植时 ,必须采取综合的土壤处理和培管技术 ,在降低土壤Cd的生物毒性的同时 ,提高苎麻对污染环境的耐受性 ,以实现较高的产量水平 .

关 键 词:苎麻 生物毒性 土壤污染 镉污染 土壤治理

Phytotoxic effect of soil cadmium pollution on ramie
WANG Kairong,ZHOU Jianglin,GONG Huiqun. Phytotoxic effect of soil cadmium pollution on ramie[J]. The journal of applied ecology, 2000, 11(5): 773-776
Authors:WANG Kairong  ZHOU Jianglin  GONG Huiqun
Affiliation:Changsha Institute of Agricultural Modernization, Chinese Academy of Sciences, Changsha 410125. krwang@ms.csiam.ac.cn
Abstract:A microplot locating experiment was conducted to study the phytotoxic effect of adding Cd in soil on ramie plants. The results showed that the contents of chlorophyll a and b of leaf, and the photosynthesis productivity of ramie plant were significant reduced by the addition of Cd. As the content of soil Cd reached to 14 mg.kg-1, the biomass yield of the above-ground part of ramie plants was 20% lower than the control, and was 50% lower when soil Cd content was at 100 mg.kg-1. The number of effective tillers was a main factor affecting the yield of ramie raw fibers, and Cd addition had a relatively small effect on the quality of raime fibers. It is suggested that a synthetical technology of soil treatment and agronomic measures should be applied to eliminate the toxic effect of soil Cd and to enhance the resistance of plant against soil Cd pollution when employing ramie as the alternative of food and vegetable crops in a Cd-polluted region, which is also important for a higher yield of ramie.
Keywords:Ramie   Soil Cd pollution   Phytotoxicity.
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