土壤添加剂对蜈蚣草吸收转运铅、镉的影响  

Effects of soil additives on the uptake and translocation of lead and cadmium by Pteris vittata L.

作　　者：杨树深[1,2] 杨军[2] 杨俊兴[2] 万小铭[2] 雷梅[2] 陈同斌[2] 刘树庆[1] 

机构地区：[1]河北农业大学资源与环境科学学院,河北保定071000 [2]中国科学院地理科学与资源研究所环境修复与资源工程研究室,北京100101

出　　处：《生态学杂志》2017年第6期1650-1657,共8页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(41271478)资助

摘　　要：通过盆栽试验研究了磷酸二氢铵、柠檬酸与乙二胺四乙酸(EDTA)对蜈蚣草在Pb-Cd复合污染的2种北方典型土壤(潮土和潮褐土)中吸收转运Pb、Cd的影响。结果表明,EDTA显著提高了蜈蚣草体内Pb的浓度与积累量,其中羽叶的Pb浓度在潮土与潮褐土中分别为对照的33.9和5.97倍,积累量分别为对照的9.22与1.18倍。EDTA也显著提高了蜈蚣草体内Cd的浓度,其中羽叶Cd的浓度分别为对照的9.16和2.40倍;而对Cd的积累无促进作用。磷酸二氢铵与柠檬酸在2种土壤中对蜈蚣草吸收富集Pb、Cd均无促进作用。此外,磷酸二氢铵显著促进了蜈蚣草的生长;而EDTA显著降低了蜈蚣草的生物量。本研究可为蜈蚣草应用于北方Pb-Cd复合污染土壤修复和应用土壤添加剂来提高其修复效率提供理论依据。Aiming to investigate the effects of NH4H2PQ, citric acid and EDTA on the accumu- lation and translocation of lead （Pb） and cadmium （Cd） by Pteris vittata L., a pot experiment was conducted using two types of Pb and Cd co-contaminated soils （ fluvo-aquic soil and meadow cinnamon soil） collected from northern China. Results indicated that EDTA significantly in- creased the aboveground Pb concentrations of P. vittata by 33.9 folds in fluvo-aquic soil and by 5.97 folds in meadow cinnamon soil, respectively. Due to the inhibition of EDTA on the biomass of P. vittata, the extent of increase in Pb amount accumulated in the aboveground part was less, being 9.22 folds in fiuvo-aquic soil and 1.18 folds in meadow cinnamon soil, respectively. Simi- larly, EDTA increased the aboveground Cd concentrations of P. vittata by 9.16 folds in fluvo- aquic soil and 2.40 folds in meadow cinnamon soil respectively, but did not increase the amount of Cd accumulated in the aboveground parts of P. vittata. Neither NH4H2PO4 nor citric acid treat- ment increased the concentration of Pb and Cd in P. vittata. This study can provide a basis for the remediation of Pb-Cd co-contaminated soil.

关 键 词：蜈蚣草 铅 EDTA 柠檬酸 镉 

分 类 号：X173[环境科学与工程—环境科学] X53