摘要
利用盆栽试验研究了水分特征对伴矿景天生长和重金属吸收性的影响。结果表明:在70%土壤最大田间持水量(70%WHC)处理下,伴矿景天生长最好,其地上部鲜重显著高于其他处理;70%WHC处理伴矿景天对重金属吸收能力最强,其茎中Zn的浓度显著高于其他处理,茎中Cd的浓度分别比35%WHC、100%WHC、淹水处理高27.1%、29.0%、63.1%;叶中的Zn浓度表现出与茎中相同趋势,叶中Cd的浓度与茎中不同,以100%WHC处理最高。70%WHC处理下,植物提取Zn、Cd的效率最高,其修复效率均显著高于其他处理。这些结果表明,土壤水分状况在土壤重金属污染伴矿景天植物吸取修复中起着重要作用。
A pot experiment was carried out to study the effects of soil moisture on the growth and heavy metals uptake of Sedum plumbizmcicola under different water holding capacities （WHC）. The results showed that Sedum plumbizincicola grew best under the treatment of 70% of WHC, its aboveground plant fresh weight was significantly higher than those of other treatments, its heavy metal uptaking amount was also the highest, and Zn concentration in stem was significantly higher than those of others treatments. Cd concentration in stem under 70% of WHC were 27.1%, 29.0% and 63.1% higher compared to 35%WHC, 100%WHC and water logging treatments respectively; Zn concentration in leaf showed the same trend as the stem, however, Cd concentration in leaf didn＇t show the same trend as the stem, which showed the highest Cd concentration under 100% of WHC. The phytoextraction efficiency of Zn and Cd were the highest under 70% of WHC. These above results showed that soil moisture plays an important role for the heavy metal phytoextraction by Sedum plumbizincicola.
出处
《土壤》
CAS
CSCD
北大核心
2009年第4期572-576,共5页
Soils
基金
国家高技术研究发展计划(863)项目(2007AA061001)
中国科学院创新团队国际合作伙伴计划项目(CXTD-Z2005-4)资助
关键词
伴矿景天
水分特征
生长
重金属
吸收性
Sedum plumbizincicola, Soil moisture, Growth, Heavy metal, Uptake
