土壤镉污染对四种阔叶树苗木叶绿素荧光特性和生长的影响  

Impact of soil cadmium contamination on chlorophyll fluorescence characters and biomass accumulation of four broad-leaved treespecies seedlings.

作　　者：曹玲[1] 王庆成[1] 崔东海[1] 

机构地区：[1]东北林业大学林学院,哈尔滨150040

出　　处：《应用生态学报》2006年第5期769-772,共4页Chinese Journal of Applied Ecology

基　　金：黑龙江省科技计划项目(GC01KB213);国家自然科学基金项目(30371149);东北林业大学校立科研基金资助项目

摘　　要：采用盆栽方法研究了土壤镉污染对白牛槭、刺玫果、金银忍冬和东北山梅花叶绿素荧光参数及生物量的影响.设置0、50、100和200mg·kg-1风干土4种镉浓度处理,测定苗木在不同镉浓度土壤中生长70d后的叶绿素荧光参数.结果表明,随着镉处理浓度的提高,4种树种的Fv/Fm、ΦPSⅡ和qP均逐渐降低,qN则逐渐上升.4种苗木在一个生长季中的生物量累积随着镉浓度的增大逐渐降低.树种间荧光参数和生物量的变化幅度不同,白牛槭的变幅最大.刺玫果最小;以叶绿素荧光参数和生物量评价4树种抗镉污染能力,刺玫果最强、白牛槭最弱.In a greenhouse pot experiment, a gradient of soil Cd concentration was established by adding 0, 50, 100 and 200 mg CdCl2·kg^-1 air-dried soil, and the seedlings of one-year-old Rosa davurica, Philadelphus schrenkii, Acer mandshurica and Lonicera maackii were transplanted. The measurement of the seedlings＇ chlorophyll fluorescence parameters and biomass accumulation after 70 days of transplanting showed that with increasing soil Cd content, all the test tree species had a decrease of Fv/Fm, ФPSⅡ, qP and biomass, but an increase of qN. A. mandshurica had the greatest responses, followed by P. schrenkii and L. maackii, and R. davurica. The tolerance of these tree species to soil Cd contamination followed the order of R. davurica 〉 P. schrenkii and L. maackii 〉 A. mandshurica.

关 键 词：镉 叶绿素荧光 生物量 刺玫果 东北山梅花 白牛槭 金银忍冬 

分 类 号：X173[环境科学与工程—环境科学]