中山大学学报自然科学版 ›› 2010, Vol. 49 ›› Issue (2): 138-144.

• 研究论文 • 上一篇    下一篇

复合污染重金属在水稻不同部位的积累转运

刘志彦1,2, 田耀武3, 陈桂珠1   

  1. (1中山大学环境科学与工程学院, 广东 广州510275;2聊城大学环境与规划学院, 山东 聊城252059;3河南科技大学林学院, 河南 洛阳 471003)
  • 收稿日期:2009-04-13 修回日期:1900-01-01 出版日期:2010-03-25 发布日期:2010-03-25

Accumulation and Translocation of Combined Heavy Metals in Different Parts of Rice

LIU Zhiyan1,2, TIAN Yaowu3, CHEN Guizhu1   

  1. (1.School of Environmental Science and Engineering, Sun Yatsen University, Guangzhou 510275, China; 2.College of Environment & Planning, Liaocheng University, Liaocheng 252059, China; 3. College of Forestry, Henan University of Science and Technology, Luoyang 471003, China)
  • Received:2009-04-13 Revised:1900-01-01 Online:2010-03-25 Published:2010-03-25

摘要:

通过在广东大宝山矿区Fe、Cu、Zn、Pb、As和Cd复合污染土壤中进行大田试验,研究了6种金属元素在杂交稻、常规稻和糯稻3个水稻品系(共21个水稻品种)的稻米、谷壳、稻草、根、铁膜以及根系各部位的积累转运规律。结果表明,6种供试金属元素在水稻体内含量均为地下部(根系)>地上部。水稻各部位金属含量指标中,大部分指标品系间含量差异极显著(P<0.01)。常规稻和糯稻稻米对Fe、Cu、Zn、Pb和Cd的积累能力均高于杂交稻,但杂交稻稻米对As的积累能力高于其它两个品系。在Fe、Cu、Zn、Pb和Cd污染土壤中较适宜种植杂交稻;在As污染土壤则较适宜种植糯稻。Zn、Pb和As在水稻不同部位的富集系数均为根系>稻草>谷壳>稻米;Fe、Cu和Cd的富集系数均为根系>稻草>稻米>谷壳。除Cu外,其余5种金属元素Fe、Zn、Pb、As和Cd在铁膜的富集系数均高于根部。铁膜对不同金属的富集能力不同,排序为Cd>As>Fe>Zn>Pb>Cu。

关键词: 复合污染, 水稻, 品系, 积累, 转运

Abstract: The accumulation and translocation of metals Fe, Cu, Zn, Pb, As and Cd in different parts (rice core, rice hull, straw, root, iron plaque and root system) of 21 rice varieties referred to three common rice cultivars (hybrid, conventional and glutinous) were studied through the field experiment in heavy metal polluted soils in the Dabao Mountain of Shaoguan, Guangdong province. The contents of the six experimental metals were higher in underground parts (root system) than in overground parts. Metal concentrations in different parts of rice showed significant differences among various rice cultivars (P<0.01). Conventional and glutinous rice had stronger ability to accumulate Fe, Cu, Zn, Pb and Cd than hybrid rice. Hybrid rice had stronger ability to accumulate As than the other two cultivars. Hybrid rice was more applicable to Fe, Cu, Pb, Zn and Cd polluted soils. Glutinous rice was more applicable to As polluted soils. The accumulation factors of Zn, Pb and As followed the order of root system>straw>rice hull>rice core. The accumulation factors of Fe, Cu and Cd followed the order of root system>straw>rice core>rice hull. The values of accumulation factors of Fe、Zn、Pb、As and Cd are higher in iron plaque than in root, with the exception of Cu. The ability to accumulate different metals by iron plaque was different, with the rank of Cd>As>Fe>Zn>Pb>Cu.

Key words: combined pollution, rice, cultivar, accumulation, translocation

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