土壤镉污染对4种北方阔叶树根系生理生化指标的影响

目的]研究镉污染对4种植物根系生理生化指标的影响。方法]采用盆栽方法研究了不同浓度镉处理对白牛槭、刺玫果、金银忍冬和东北山梅花4树种根系生理生化指标的影响。一个生长季结束后收获苗木,测定各项指标。结果]随着土壤中镉处理浓度的增大,4树种新根生物量、根系活力、SOD活性均逐渐降低,MDA含量逐渐上升,4树种的变化幅度不同。结论]刺玫果和东北山梅花的抗镉污染能力优于白牛槭和金银忍冬。

Effects of Soil Cadmium Contamination on the Root Physiological and Biochemical Indexes in the Seedlings of Four Tree Species

Objective]The effects of cadmium contamination on the root physiological and biochemical indexes in four tree species were studied.Method]The effect of soil cadmium contamination on the root physiological and biochemical indexes in the seedlings of four tree species such as Rosa davurica Pall.,Philadelphus schrenkii Rupr.,Acer mandshuricum Max.and Lonicera maackii Maxim.was studied by pot growing one-year-old seedlings.Measurement of the parameters was made after growing in one season.Result]New root biomass,root activity and the activity of superoxide dismutase(SOD) of four tree species seedlings declined with enhanced the Cd content in soil,nevertheless the manlondialdehyde(MDA) content was increased.The variation range of four tree species seedlings was different.Conclusion]The tolerance of the Rosa davurica Pall.and Philadelphus schrenkii Rupr.to soil Cd contamination was superior to the ability of the Lonicera maackii Maxim.and Acer mandshuricum Max.on soil Cd contamination.