锌在红树植物白骨壤-土壤系统中的分布与迁移  

Distribution and migration of zinc in Avicennia marina plant-soil system

作　　者：陈桂葵[1] 陈桂珠[2] 

机构地区：[1]华南农业大学农学院,广州510642 [2]中山大学环境科学研究所,广州510275

出　　处：《应用生态学报》2007年第7期1505-1509,共5页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(39470151);华南农业大学校长基金资助项目(2004K047).

摘　　要：河口海湾沉积物中锌的污染已对水生生物构成了潜在的威胁.本研究在温室中建立红树植物白骨壤的模拟湿地系统,分别用不同浓度的人工配置污水和人工海水（对照）每周定时、定量地对模拟湿地系统进行为期1年的污灌试验,研究污水中的重金属锌在红树植物白骨壤-土壤系统中的分布、累积与迁移规律.结果表明,由人工污水加入模拟系统中的锌主要存留在土壤中（大于67%）,只有一小部分（1.24%-10.4%）迁移到植物体和凋落物中,即白骨壤-土壤系统对生活污水中的锌具有较强的净化作用.根据物质平衡模型进行的计算表明,土壤子系统中锌的环境容量较大.Zinc is a major anthropogenic contaminant in estuarine ecosystem, and has potential ecotoxicological consequences for aquatic animals and plants. An artificial mangrove wetland was set up in greenhouse to study the distribution and migration of zinc in synthetic wastewater in Avicennia marina plant-soil system, Different concentration synthetic wastewater and 1.5% salinity artificial seawater （control） were discharged into the system in fixed quantity twice a week for a year. The results showed that most part （ 〉 67% ） of zinc in the artificial wastewater discharged into the system was remained in the soil, and only a small portion （ 1.24%-10. 4% ） of it was entered into plant and litter, indicating that this artificial plant-soil system had a stronger purifying effect on the zinc in synthetic wastewater. The calculation with matter balance model indicated that soil subsystem had a higher environmental capacity of bearing zinc.

关 键 词：白骨壤 锌 分布 迁移 污水 

分 类 号：Q948[生物学—植物学]