壳聚糖辅助下火炬树修复铅污染土壤潜力及其生长  

The Potential of Rhus typhina for Phytoremediation of Pb-Contaminated Soils and the Growth with the Aid of Chitosan Addition

作　　者：陆秀君[1] 刁诚轩[1] 邹永田 黄桂凤[3] 

机构地区：[1]沈阳农业大学林学院。辽宁沈阳110161 [2]抚顺市清源县湾甸子镇林业站,辽宁清源113311 [3]沈阳市绿化管理处,辽宁沈阳110016

出　　处：《北方园艺》2010年第14期34-38,共5页Northern Horticulture

基　　金：辽宁省自然科学基金资助项目(20072125);辽宁省百千万人才资助项目(2008921057)

摘　　要：采用盆栽试验研究了火炬树(Rhus typhina)在土壤铅浓度分别为9001、200、1 800mg/kg,壳聚糖浓度分别为0、2.5、57、.5 mmol/kg时的生长及其修复能力。结果表明:不同浓度的铅处理对火炬树出苗率、苗高和地茎的生长均造成了抑制,并随着土壤铅浓度的增加抑制作用增大。在有壳聚糖辅助下,对苗高和地茎的抑制效果更强。不同土壤铅浓度间,火炬树体内铅的积累量随土壤铅含量的增加而显著的增加;相同土壤铅浓度间,火炬树体内铅的积累量随壳聚糖含量的增加而增加。在土壤铅浓度为1 800 mg/kg,壳聚糖浓度为7.5 mmol/kg时,火炬树地上部分对铅的积累量最大,达到339.6μg/g。而铅积累总量在土壤铅浓度为1 200 mg/kg,壳聚糖浓度为5 mmol/kg时达到最大,约为1 109.97μg/株,火炬树能正常生长,积累效果最理想。A pot study was conducted to investigate the potential of Rhus typhina for phytoremediation of Pb-contaminated soils（total soil Pb concentration 900,1 200,1 800 mg/kg） and the growth with the aid of chitosan addition（chitosan concentration 0,2.5,5,7.5 mmol/kg）.The results showed that the rate of germination,the plant height and the diameter growth process were restrained by different treatments of Pb concentration.The figures decreased when the Pb concentrations increased.Chitosan addition to soil significantly restrained the plant height and the diameter growth process.When the Pb concentrations were different,the figures of total Pb concentration in plant significantly went up when the Pb concentrations increased.When the Pb concentrations were the same,the figures of total Pb concentration in plant raised when the chitosan concentrations increased.When concentrations of Pb and chitosan were 1 800 mg/kg and 7.5 mmol/kg,respectively,its shoot Pb concentration was the highest and could reach 339.6 μg/g.When concentrations of Pb and chitosan were 1 200 mg/kg and 5 mmol/kg,respectively,the total Pb concentration in plant was the highest and could reach 1 109.97 μg/plant,and it indicated that,in this treatment,Rhus typhina could grow normally and the effects of accumulation was the best,it may provide a effective soil decontamination strategy.

关 键 词：铅 火炬树 壳聚糖 植物修复 

分 类 号：S791.255[农业科学—林木遗传育种]