摘要
采用逻辑斯蒂克分布(log-logistic distribution)模型结合物种敏感性分布方程Burr-III分析,研究了2种不同土壤中添加不同水平的外源Zn后对8种不同植物毒性的剂量-效应关系及不同植物对外源Zn毒害的敏感性差异。结果表明,土壤中添加低浓度(<100mg·kg-1)Zn能对植物生长产生刺激效应,而过量的Zn则产生明显毒害作用。土壤中Zn毒性的阈值浓度(ECx)在不同植物间有较大差异,这主要与植物种类及土壤性质差异有关。不同土壤中Zn植物毒性的敏感性分布结果表明,不同植物对Zn毒性的敏感性频次分布有明显差异,其中叶菜类植物对土壤中Zn的毒害较为敏感,而禾本科类植物(如玉米)对Zn具有较强的抗性,不同类型植物对土壤中Zn毒害的敏感性分布频次顺序与土壤性质无关。
A pot experiment with two different soils was conducted to study the dose-response curves of 8 plant species after applying different concentration Zn and the differences in the sensitivity of the species to the applied Zn. The threshold values of the zinc phytotoxicity to the plant species were analyzed by using log-logistic distribution model, and the species sensitivity distribution was performed with BurrIII model. All the test plant species had hormesis when the zinc was applied with low level （100 mg·kg-1）, but the phytotoxicity of zinc was observed when the zinc was added with high levels. There existed greater differences in the threshold values of zinc among the plant species due to the difference of plant species and soil properties. The accumulated frequency of the threshold values of zinc varied markedly among the plant species. In general, leaf vegetables （e.g., Chinese cabbage and mustard） were more sensitive to the toxicity of zinc than the plants of Poaceae family （e.g., maize）. The species sensitivity distribution had no relationships with soil properties.
出处
《生态学杂志》
CAS
CSCD
北大核心
2012年第3期538-543,共6页
Chinese Journal of Ecology
基金
国家自然科学基金项目(21077131)
农业部农业公益性行业专项(200903015
201103007)资助
关键词
ZN
毒性
物种敏感性分布
剂量-效应
zinc
phytotoxicity
species sensitivity distribution （SSD）
dose-response curve
