Sequestration of As by iron plaque on the roots of three rice (Oryza sativa L.) cultivars in a low-P soil with or without P fertilizer

doi:10.1007/s10653-005-0132-5

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 土壤环境科学实验室

	Sequestration of As by iron plaque on the roots of three rice (Oryza sativa L.) cultivars in a low-P soil with or without P fertilizer
	Huang, YZ; Hu, Y; Li, JH; Zhu, YG; Hu, HQ; Christie, P
刊名	ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
	2005
卷号	27 期号:2 页码:169-176
关键词	Arsenic Iron Plaque Oryza Sativa Rhizosphere Sequestration
DOI	10.1007/s10653-005-0132-5
英文摘要	A pot experiment was carried out in a greenhouse to investigate the sequestration of As in iron plaques on root surface of three rice (Oryza sativa L.) cultivars. Phosphate (P) fertilization increased both plant biomass and tissue P concentrations significantly, indicating that the soils used in this study was highly P-deficient. Results from this study confirmed that low P supply improved the formation of iron plaque on rice roots. As a consequence, arsenic (As) concentrations in DCB-extracts with no P addition were significantly higher than those with P fertilization. Arsenic was highly sequestrated in iron plaque; arsenic concentration in iron was up to nearly 120 mg kg(-1) stop, while arsenic concentrations in roots were just several mg kg(-1) stop. Both arsenic and phosphate concentrations in iron plaque were highly positively correlated with the amounts of iron plaque (DCB-extractable Fe). Contrary to normal understanding that increasing P supply could reduced As accumulation in plants, results from the present study showed that P fertilization did not inhibit the As uptake by plants (As accumulation in aboveground), which was probably due to the fact that iron plaque formation was improved under low P conditions, thus leading to more As sequestration in the iron plaque. Thus results obtained in this study indicated that the iron plaque may inhibit the transfer of As from roots to shoots, and thus alter the P-As interaction in plant As uptake processes.
学科主题	Engineering ; Environmental Sciences & Ecology ; Public, Environmental & Occupational Health ; Water Resources
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Public, Environmental & Occupational Health ; Water Resources
WOS记录号	WOS:000230356000006
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/23355]
专题	生态环境研究中心_土壤环境科学实验室
推荐引用方式 GB/T 7714	Huang, YZ,Hu, Y,Li, JH,et al. Sequestration of As by iron plaque on the roots of three rice (Oryza sativa L.) cultivars in a low-P soil with or without P fertilizer[J]. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,2005,27(2):169-176.
APA	Huang, YZ,Hu, Y,Li, JH,Zhu, YG,Hu, HQ,&Christie, P.(2005).Sequestration of As by iron plaque on the roots of three rice (Oryza sativa L.) cultivars in a low-P soil with or without P fertilizer.ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,27(2),169-176.
MLA	Huang, YZ,et al."Sequestration of As by iron plaque on the roots of three rice (Oryza sativa L.) cultivars in a low-P soil with or without P fertilizer".ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 27.2(2005):169-176.