无色菌产酸对土壤溶液重金属浓度及海州香薷重金属吸收的影响  

Effects of Acid Production of Achromatium sp. on Desorption of Soil Heavy Metals and Their Uptake by Elsholtzia splendens

作　　者：唐明灯[1] 吴龙华[1] 李振高[1] 骆永明[1] 胡锋[2] 盛下放[3] 江春玉[3] 

机构地区：[1]中国科学院土壤环境与污染修复重点实验室(中国科学院南京土壤研究所),南京210008 [2]南京农业大学资源与环境科学学院,南京210095 [3]南京农业大学生命科学学院农业部农业环境微生物工程重点开放实验室,南京210095

出　　处：《土壤》2009年第3期425-431,共7页Soils

基　　金：国家高新技术研究发展计划项目(2004AA649050);国家重点基础研究发展规划项目(2002CB410809);国家自然科学基金项目(40371070)资助

摘　　要：利用培养试验和盆栽试验研究了一株无色菌(Achromatium sp.)对复合污染土壤上Cu、Zn的溶出效果及其对海州香薷(Elsholtzia splendens)生长和Cu、Zn吸收性的影响。结果表明,菌株在培养试验(pH=4.65)中的产酸效果较盆栽试验(7.3<pH<8.2)更佳;土壤溶液可溶性Cu与pH显著正相关,而可溶性Zn与pH显著负相关;和对照处理相比,无色菌处理提高海州香薷的生物量和地上部Cu浓度,显著(p<0.05)提高海州香薷对污染土壤中Cu的去除潜力。An incubation experiment and a pot experiment were conducted to investigate the influences of an ,Achromatium sp. strain on the desorption of Cu/Zn of a soil contaminated by heavy metals and the growth and the uptake of Cu/Zn of Elsholtzia splendens. The results indicated that the strain produced more acid in the incubation experiment （pH = 4.65） than in the pot one （7.3 〈 pH 〈 8.2）; The soluble Cu concentration in the soil solution was significantly positively correlated to pH while the soluble Zn concentration significantly negatively to pH value; Compared with CK, the bacterium increased E. splendens shoot biomass and shoot Cu content, and increased significantly （p 〈 0.05） Cu cleaning-up by E. splendens from the soil polluted by heavy metals.

关 键 词：细菌 pH 重金属 海州香薷 植物修复 

分 类 号：X53[环境科学与工程—环境工程]