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- Title
西藏 “一江两河” 流域主栽品种青稞对 土壤重金属的积累特性研究.
- Authors
李 雪; 刘青海; 李建洪; 邱城; 毛雪飞
- Abstract
Heavy metal contamination in agricultural environment is a potential environmental threat to food safety. Moreover, different cultivars of crops also result in significant difference of heavy metal accumulation in their edible parts, of which the crop varieties with low accumulation of heavy metals could decline the concentration of heavy metals in grain to reduce the health risks caused by food intake. Highland barley is one of the main crops in Tibet, however the heavy metal pollution along the drainage basin of one river and its two tributaries must be paid more attentions for highland barley intake. In this work, the methods of Hg, Cr, As, Pb and Cd in soil and highland barley plant samples were firstly established using microwave digestion ICP-MS. Then, nine highland barley cultivars mainly planted in the aforementioned drainage basin was selected to evaluate the accumulation characteristics of Hg, Cr, As, Pb and Cd from soil. The results indicated that the biological factors (BFs)form soil to grain ranged from 0. 006 5 to 0. 042 for Hg, of which the cultivars of Zang Qing 17 and Zang Qing 320 remained the lowest; Cr were 0. 022 4—0. 081,and Zang Qing 18 and 13-5171-7 for the lowest; As were 0. 002—0. 005 4,and Zang Qing 2000 (coated) and 13-517107 for the lowest; Pb were 0. 000 1—0. 003 5,and Xi La 22 and Zang Qing 320 for the lowest; Cd were 0. 000 9—0. 028 1,and Zang Qing 2000 (no-coated)and Zang Qing 2000 (coated)for the lowest. The BF values from soil to grain of Hg, Cr and Cd were obviously superior to that of As and Pb; furthermore, the translocation factor (TF) of stem-leaf (0. 224—3. 668) was much higher than that of root-stem (0. 180—1. 564) and leaf-grain (0. 000 9—0. 185). Taking into consideration of the combined contamination of Hg, Cr, As, Pb and Cd, the clustering analysis results proved Zang Qing 320 occupied the optimum low-accumulation capacity of heavy metals in stem, leaf and grain. Therefore, this work will provide feasible cultivars of highland barely with low-accumulation capacity of one or multi heavy metals in grain, stem and leaf vs. high-accumulation in root in the drainage basin of one river and its two tributaries of Tibet.
- Subjects
TIBET (China); HEAVY metals; WATERSHEDS; HEAVY metal toxicology; INDUCTIVELY coupled plasma mass spectrometry; POLLUTION; FOOD crops; CULTIVARS
- Publication
Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue, 2023, Vol 13, Issue 6, p652
- ISSN
2095-1035
- Publication type
Article
- DOI
10.3969/j.issn.2095-1035.2023.06.021