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不同水稻品种对重金属的积累特性
摘要点击 152  全文点击 63  投稿时间:2018-04-03  修订日期:2018-05-16
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中文关键词  水稻品种  重金属    杂交稻  糙米
英文关键词  rice variety  heavy metal  Cd  hybrid rice  brown rice
作者单位E-mail
林小兵 江西省红壤研究所, 国家红壤改良工程技术研究中心, 南昌 331717 linxiaobing@xtbg.ac.cn 
周利军 江西省红壤研究所, 国家红壤改良工程技术研究中心, 南昌 331717  
王惠明 江西省农业环境监测站, 南昌 330046  
刘晖 江西省农业环境监测站, 南昌 330046  
武琳 江西省红壤研究所, 国家红壤改良工程技术研究中心, 南昌 331717  
俞莹 江西省农业环境监测站, 南昌 330046  
胡敏 萍乡市农业局, 萍乡 337000  
何波 萍乡市农业局, 萍乡 337000  
周青辉 江西省农业环境监测站, 南昌 330046  
黄欠如 江西省红壤研究所, 国家红壤改良工程技术研究中心, 南昌 331717 qianruhuang@163.com 
中文摘要
      采用田间试验法,以南方主要种植的129个水稻品种为研究对象,通过对稻米样品中镉(Cd)、铅(Pb)、铬(Cr)、机砷(As)和总汞(Hg)重金属含量的测定,分析不同品种和类型的水稻对重金属吸收能力的差异.结果表明,35个早稻糙米Cd含量在0.35~0.60 mg·kg-1之间,超标率100%,糙米Pb含量在0.08~0.30 mg·kg-1之间,超标率14.29%;54个中稻糙米Cd含量在0.03~0.45 mg·kg-1之间,超标率33.33%;40个晚稻糙米Cd含量在0.08~0.20 mg·kg-1之间,均未超过国家标准.早、中、晚稻都表现出三系杂交稻糙米Cd含量高于两系杂交稻,但是差异不明显;早稻三系杂交稻糙米Cr和总Hg含量显著高于两系杂交稻.中稻糙米Cd含量与Pb和总Hg含量间呈显著正相关;与糙米中机As含量间存在极显著负相关;而与糙米中Cr含量间相关性不明显.总之,水稻对重金属的吸收积累,受遗传背景、品种类型和重金属互作的影响较大.
英文摘要
      Field experiments were conducted on the heavy metal contents (Cd, Pb, Cr, inorganic As, and total Hg) of the 129 main cultivated rice varieties in southern China. We analyzed the effects of different varieties and types of rice on the absorption capacities of these heavy metals. The results showed that the Cd content in 35 brown rice of early rice was 0.35-0.60 mg·kg-1, exceeding the standard rate of 100%. The Pb content in brown rice was 0.08-0.30 mg·kg-1, exceeding the rate of 14.29%. The Cd content in 54 brown rice of medium rice was 0.03-0.45 mg·kg-1, exceeding the rate of 33.33%. The Cd content in 40 brown rice of late rice was 0.08-0.20 mg·kg-1, which did not exceed the national standard. Early, middle, and late rice all showed that the Cd content of three-line hybrid rice was higher than that of two-line hybrid rice, but the difference was not obvious. The contents of Cr and total Hg in brown rice of three-line hybrid rice in early rice were significantly higher than that of two-line hybrid rice. There was a significant positive correlation between Cd content in brown rice and Pb and total Hg content in medium rice, and there was a significant negative correlation between inorganic Cd content and inorganic As content, whereas there was no significant correlation between Cd and Cr content. In short, rice's absorption and accumulation of heavy metals is greatly affected by genetic background, species types, and heavy metal interactions.

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