六价铬对薏米人工湿地微生物群落数量的影响  

Effects of Cr^(6+) on microorganism population in Coix aquatica constructed wetlands

作　　者：黄建祥[1] 李素丽[1] 吕钊彦[1] 李志刚[1] 康亮[1] 何冰[1] 

机构地区：[1]广西大学农学院,南宁530005

出　　处：《广西植物》2013年第2期253-257,共5页Guihaia

基　　金：国家自然科学基金(B070302;21167002);广西科技攻关项目(桂科攻0816002-4;桂科攻0719005-2-2B)

摘　　要：通过桶栽构筑微型模拟垂直流薏米人工湿地(CAW),以1/2 Hoaglands营养液为营养源,在营养液中添加不同浓度的Cr6+(0,5,20,40,60mg/L,以K2Cr2O7配置),各浓度处理均以不种植薏米湿地(NPW)为对照,以研究铬(Cr6+)对薏米人工湿地基质真菌、细菌及放线菌群落结构数量的影响。结果表明:(1)真菌、细菌、放线菌的数量在薏米人工湿地(CAW)中明显多于无植物对照处理(NPW);(2)中低浓度(5、20mg/L)Cr6+对CAW真菌,对NPW细菌、放线菌数量有促进作用,薏米人工湿地微生物对低中浓度的Cr6+胁迫有一定的耐受能力。The effects of hexavalem chromium on fungi, bacteria and actinomycetes communities were studied by con- structed a minitype tubs-vertical flow Coix aquatica wetland（CAW）, adding 1/2 Hoaglands nutrient solution plus 0,5, 20,40,60 mg/L Kz Cr2 07 respectively, and constructing a no plant wetland（NPW）which corresponding nutrient and hex- avalent chromium concentrations as control experiment. The results as follows：（1）The populations of fungi, bacteria and actinomycetes in CAW were bigger than that in NPW; （2）Low or middle level hexavalent chromium concentrations （5, 20 rng/L） had stimulative effect on fungi in CAW and bacteria ,actinomycetes in NPW. Microorganism population in C. aquatica constructed wetlands had the tolerant ability under the low or middle（5,20 nag/L） Cr6＋ stress.

关 键 词：六价铬 人工湿地 真菌 细菌 放线菌 

分 类 号：X172.1[环境科学与工程—环境科学]