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不同磷肥对砷超富集植物蜈蚣草修复砷污染土壤的影响
引用本文:廖晓勇,陈同斌,阎秀兰,谢华,肖细元,翟丽梅.不同磷肥对砷超富集植物蜈蚣草修复砷污染土壤的影响[J].环境科学,2008,29(10):2906-2911.
作者姓名:廖晓勇  陈同斌  阎秀兰  谢华  肖细元  翟丽梅
作者单位:中国科学院地理科学与资源研究所,北京,100101
基金项目:国家高技术研究发展计划(863计划),国家自然科学基金,国家科技支撑计划,中国科学院地理科学与资源研究所知识创新三期项目
摘    要:施肥是提高重金属污染土壤的植物修复效率的必要强化措施之一.通过研究农业生产中常用磷肥对砷超富集植物蜈蚣草生长、砷累积及氮磷钾吸收的影响,确定可提高蜈蚣草修复砷污染土壤能力的最佳磷肥类型.结果表明,与不施砷对照组相比.添加砷处理中施用相应磷肥的蜈蚣草总生物量中蜈蚣草均有所降低(除钙镁磷肥外);在添加砷的情况下,钙镁磷肥、磷酸二氢钙和磷酸二氢铵等3个施磷处理总生物量相对较高.显著高于其他磷肥处理和不施磷处理(0.83 g/pot);地上部砷累积量由大到小的顺序为:磷酸二氢钙>钙镁磷肥>磷酸二氢铵>磷酸二氢钾>磷酸二氢钠>不施磷>过磷酸钙;磷酸二氢钙处理的砷去除效率高达7.28%.由此可见,磷肥能一定程度提高砷超富集植物的修复能力,但不同磷肥对其砷去除效率的影响可达数倍之差,磷酸二氢钙是首选磷肥类型,综合考虑土壤pH、N、P和有效态砷等各种因子,磷酸二氢铵和钙镁磷肥也可作备选肥料类型.

关 键 词:蜈蚣草    磷肥  植物修复
收稿时间:2007/10/13 0:00:00
修稿时间:2008/1/22 0:00:00

Effects of Different forms of P Fertilizers on Phytoremediation for As-Contaminated Soils Using As-Hyperaccumulator Pteris vittata L.
LIAO Xiao-yong,CHEN Tong-bin,YAN Xiu-lan,XIE Hu,XIAO Xi-yuan and ZHAI Li-mei.Effects of Different forms of P Fertilizers on Phytoremediation for As-Contaminated Soils Using As-Hyperaccumulator Pteris vittata L.[J].Chinese Journal of Environmental Science,2008,29(10):2906-2911.
Authors:LIAO Xiao-yong  CHEN Tong-bin  YAN Xiu-lan  XIE Hu  XIAO Xi-yuan and ZHAI Li-mei
Abstract:Fertilization has become one of the essential measures for enhancing efficiency of phytoremediating contaminated soils with heavy metal. In order to screen optimal P fertilizer for As-phytoremediation, a greenhouse study was conducted on the growth, As-accumulation and uptake of N, P and K by Pteris vittata L. in As-contaminated soils with different forms of P fertilizers. The results indicated that the biomass of plant with As addition decreased compared to no As-addition treatments except fused calcium magnesium phosphate (CaMg-P) treatment. The plants in As addition soils with CaMg-P, calcium dihydrogen phosphate (CDP) and di-ammonium phosphate (DAP) had higher biomass than those with other P fertilizer and control (0.83 g/pot). The As accumulations of plant aboveground in As addition soils are in order of CDP> CaMg-P> DAP> Potassium Phosphate Monobasic> Monosodium phosphate>control>>Calcium superphosphate. The efficiency of As removal from As addition soils with CDP was the highest, 7.28%. Thus it can be seen the ability of phytoremediation using P. vittata could be improved by P fertilization, which CDP should be recommended preferentially and CaMg-P and DAP is considered as replaceable fertilizer for sake of pH, N, P and available As in phytoremediated soils.
Keywords:Pteris vittata L    arsenic  phosphorus fertilizer  phytoremediation
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