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中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (3): 80-85.doi: 10.11924/j.issn.1000-6850.2012-2297

• 农学 农业基础科学 • 上一篇    下一篇

重金属Cd和 Pb在甜高粱幼苗体内的积累特性研究

吐尔逊吐尔洪 再吐尼古丽?库尔班 叶凯   

  • 收稿日期:2012-06-25 修回日期:2012-08-12 出版日期:2013-01-25 发布日期:2013-01-25
  • 基金资助:
    新疆维吾尔自治区科研院所改革与发展专项资金“重金属污染对甜高粱生理特性的影响及积累规律研究”(2011024)；新疆农业大学草业与环境科学学院土壤学自治区重点学科资助。

Study on the Accumulation Properties of Sweet Sorghum Seedling to Cd and Pb

  • Received:2012-06-25 Revised:2012-08-12 Online:2013-01-25 Published:2013-01-25

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摘要： 为了确认在苗期甜高粱对土壤重金属污染的响应和吸收特性，通过室内盆栽实验，研究了在不同程度土壤重金属污染条件下‘新高粱3号’(XT-2)和‘辽甜1号’2个甜高粱品种幼苗体内镉、铅含量的分布特征，并分析了富集系数和转运系数等指标。结果表明：甜高粱幼苗各部分的重金属积累量随着土壤中重金属含量而增加。在根部、叶部和茎部积累的重金属含量之间的差异均达到极显著水平。2个品种对重金属Cd的积累含量大小顺序为根部>茎部>叶片，对Pb的积累含量大小依次为根部>叶片>茎部；2个品种根部的富集系数均大于茎和叶，茎和叶的富集系数差异不明显。‘辽甜1号’茎部对Cd的富集系数均高于XT-2。2个品种的茎部对Cd的转运系数均高于叶片的转运系数。‘辽甜1号’和XT-2各部分在苗期的转运系数和富集系数均小于1。

关键词: 莱州湾南岸, 莱州湾南岸

Abstract: To confirm the response and absorption character of sweet sorghum in seedling stage to soil heavy metal pollution, the seedlings of two sweet sorghum varieties (‘Liaotian No.1’& XT-2) were studied by pot experiment with heavy metal-polluted soil to confirm the distribution regularity of Pb and Cd in sweet sorghum seedling. And the accumulation coefficient and transfer coefficient were calculated. The results showed that: the heavy metal contents in two varieties’of sweet sorghum seedlings increased with increase of heavy metal fraction in soil. There were significant differences between the heavy metal contents in root, stem and leaf. The Cd was accumulated in the order that root > stem > leaf and Pb accumulation order was root > leaf > stem. The accumulation coefficients of roots of two varieties were higher than those of stem and leaf, and there were no clear differences in accumulation coefficients of stem and leaf. The transfer coefficients of‘Liaotian No.1’stem to Cd was higher than that of XT-2. The Cd transfer coefficients of stem of two varieties were higher than that of leaves. The two coefficients of two varieties were less than 1.