摘要
盆栽试验研究了海州香薷在Cu、Zn、Pb污染土壤上生长和对Cu、Zn、Pb的富集能力,以及调控剂EDDS、壳聚糖和微生物菌剂对海州香薷重金属吸收的影响。结果表明,Cu223mg/kg,Pb232mg/kg,Zn1068mg/kg的重金属复合污染土壤对海州香薷的生长发育没有明显影响。施用EDDS(3mmol/kg土)+微生物制剂处理组海州香薷叶片中Cu含量高达847mg/kg,Zn含量为745mg/kg;Cu吸收量高达6244μg/株,Zn吸收量为5670μg/株,叶片中Cu、Zn的含量和吸收量均极显著高于对照(p<0.01);3mmol/kg土EDDS处理海州香薷茎中Pb含量显著增加(p<0.05),茎中Pb的吸收量亦显著提高(p<0.05),茎秆中Pb的吸收量为274μg/株。微生物制剂或壳聚糖单独处理对海州香薷生长和金属元素吸收均没有明显的效果。
Soils polluted by fly-ash rich in copper from smelteries were collected from Zhejiang Province, the concentration of Cu, Zn and Pb was 223 mg/kg, 1068 mg/kg and 232 mg/kg, respectively. A pot experiment was conducted to investigate growth and metal uptake of Elsholtzia splendens. Microbial product, mainly VA fungus, was applied when plants were sown. EDDS and chitosan were used 15 days before plants were harvested. The objective was to investigate the effect of these materials enhancing growth and metal accumulation by Elsholtzia splendens plant. The results showed that Elsholtzia splendens could endure high concentrations of Cu, Zn and Pb without any visual symptoms of heavy metal toxicity. Compared to the control, concentrations of Cu and Zn in Elsholtzia splendens were significantly increased in the treatment of EDDS plus microbial product, suggesting that the treatment enhanced plant Cu and Zn uptake significantly. EDDS application alone increased Pb concentration in the ground parts of Elsholtzia splendens. But for treatment of microbial product or chitosan alone, they had no significant effect on uptake of the heavy metals by Elsholtzia splendens.
出处
《土壤》
CAS
CSCD
北大核心
2005年第2期152-157,共6页
Soils
基金
国家重点基础研究发展规划(973)项目(2002CB410809)
国家高技术研究发展计划(863)项目(2001AA645010-2)
国家自然科学基金项目(40001013
40301046)共同资助。
关键词
海州香薷
EDDS
微生物制剂
复合污染
Elsholtzia splendens, EDDS, Microbial product, Contamination
