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	Selecting appropriate forms of nitrogen fertilizer to enhance soil arsenic removal by Pteris vittata: A new approach in phytoremediation
	Liao X. Y. ; Chen T. B. ; Xiao X. Y. ; Xie H. ; Yan X. L. ; Zhai L. M. ; Wu B.
	2007
关键词	arsenic (As) availability hyperaccumulator nitrogen (N) fertilizer nutrient phytoremediation Pteris vittata soil contaminated soils growth l. hyperaccumulator accumulation phosphate plants water rhizosphere phosphorus
英文摘要	Certain plant species have been shown to vigorously accumulate some metals from soil, and thus represent promising and effective remediation alternatives. In order to select the optimum forms of nitrogen (N) fertilizers for the arsenic (As) hyperaccumulator, Pteris vittata L., to maximize As extraction, five forms of N were added individually to different treatments to study the effect of N forms on As uptake of the plants under soil culture in a greenhouse. Although shoot As concentration tended to decrease and As translocation from root to shoot was inhibited, overall As accumulation was greater due to higher biomass when N fertilizer was added. Arsenic accumulation in plants with N fertilization was 100 similar to 300% more than in the plants without N fertilization. There were obvious differences in plant biomass and As accumulation among the N forms, i.e., NH4HCO3, (NH4)(2)SO4, Ca(NO3)(2), KNO3, urea. The total As accumulation in the plants grown in As-supplied soil, under different forms of N fertilizer, decreased as NH4HCO3 >(NH4)(2)SO4 > urea > Ca(NO3)(2) > KNO3 > CK. The plants treated with N and As accumulated up to 5.3 similar to 7.97 mg As/pot and removed 3.7 similar to 5.5% As from the soils, compared to approximately 2.3% of As removal in the control. NH4+-N was apparently more effective than other N fertilizers in stimulating As removal when soil was supplied with As at initiation. No significant differences in available As were found among different forms of N fertilizer after phytoremediation. It is concluded that NH4+-N was the preferable fertilizer for P. vittata to maximize As removal.
出处	International Journal of Phytoremediation
卷	9
期	4
页	269-280
收录类别	SCI
语种	英语
ISSN号	1522-6514
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/23536]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Liao X. Y.,Chen T. B.,Xiao X. Y.,et al. Selecting appropriate forms of nitrogen fertilizer to enhance soil arsenic removal by Pteris vittata: A new approach in phytoremediation. 2007.

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