A model for evaluation of the phytoavailability of trace elements to vegetables under the field conditions

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	A model for evaluation of the phytoavailability of trace elements to vegetables under the field conditions
	Wang, XP; Shan, XQ; Zhang, SZ; Wen, B
刊名	CHEMOSPHERE
	2004
卷号	55 期号:6 页码:811-822
关键词	model vegetables phytoavailability soil properties
英文摘要	Currently, several single extraction methods are used for the evaluation of the phytoavailability of metals using pot experiments. A systematic comparison, however, is lacking. It is especially true for the field studies. This study was to investigate the phytoavailability of trace elements to vegetables grown on metal-contaminated soils under the field conditions. All soils collected were typical calcareous soils in northern China. Four frequently used methods using CaCl(2), diethylenetriaminepentaacetic acid (DTPA), CH(3)COOH, and water as extractants were compared for phytoavailability. The concentrations of metals extracted by these four extraction methods ranged from 3.42 to 815, 1.51-6965, 0.732-24473, 0.688-7863, 0.246-685, 1.99-5337 0.203-4649 ng/g for Cr, Ni, Zn, Cu, Cd, Pb and REEs, respectively. Simple correlation analysis indicated that a significant correlation (Cr: r = 0.5411; Zn: r = 0.6352; Cd: r = 0.6979; Pb: r = 0.5537 and REEs: r = 0.5185-0.6684) was observed between the CaCl(2)-extractable metals in soil solution and that in Chinese cabbage. In addition, soil pH, organic matter (OM), and cation exchange capacity (CEC) also affect the phytoavailability. An empirical model was developed to express the combined effect of soil properties on the phytoavailability. The stepwise multiple regression analysis demonstrated that the phytoavailability of trace elements strongly correlated with the extractable fraction by CaCl(2), total metal concentration in soils, and soil pH, OM, CEC. This model can describe approximately 75-95% of the variability of metal uptake and the r 2 values ranged from 0.741 to 0.954, which were much better than the single correlation analysis. For celery and cole, a strong correlation was obtained for Cr, Ni, Zn, Cu, Cd, La, Ce, Pr and Nd. For spinach and Chinese cabbage, however, a positive correlation was only observed for I and 3 metals, respectively. Generally, the developed empirical model can integrate the combined effects of soil properties, extractable metal fractions in soil solutions and plant species on the phytoavailability of metals to vegetables in the field conditions. (C) 2003 Elsevier Ltd. All rights reserved.
研究领域[WOS]	Environmental Sciences & Ecology
WOS记录号	WOS:000220793600003
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/23420]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Wang, XP,Shan, XQ,Zhang, SZ,et al. A model for evaluation of the phytoavailability of trace elements to vegetables under the field conditions[J]. CHEMOSPHERE,2004,55(6):811-822.
APA	Wang, XP,Shan, XQ,Zhang, SZ,&Wen, B.(2004).A model for evaluation of the phytoavailability of trace elements to vegetables under the field conditions.CHEMOSPHERE,55(6),811-822.
MLA	Wang, XP,et al."A model for evaluation of the phytoavailability of trace elements to vegetables under the field conditions".CHEMOSPHERE 55.6(2004):811-822.