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烤烟品种云85及红大Cd及Cr含量分析
作者:封俊
来源:《安徽农业科学》2015年第01期
摘要
[目的]了解烤烟品种的重金属富集能力。[方法]利用原子分光光度法对攀西地区烤烟品种云烟85和红花大金元进行了重金属镉(Cd)、铬(Cr)的分析。[结果]云烟85重金属Cd含量最高为1.18 mg/kg,红花大金元最高为1.65 mg/kg;云烟85重金属Cr含量最高达5.96 mg/kg,红花大金元最高为4.95 mg/kg。[结论] Cd、Cr 2个重金属元素的含量在品种及地区间存在较大差异。
关键词烤烟;重金属;Cd;Cr;攀西地区 中图分类号S572文献标识码
A文章编号0517-6611(2015)01-084-02
Analysis on Cd and Cr Contents in Fluecured Tobacco Varieties Yunyan 85 and Hongda FENG Jun (Panzhihua Tobacco Monopoly Bureau, Panzhihua, Sichuan 617099) Abstract [Objective] The aim was to understand the heavy metal enrichment ability of fluecured tobacco varieties.[Method] The contents of Cd and Cr of fluecured tobacco varieties Yunyan 85 and Hongda in Panxi area were measured by atomic spectrophotometry analysis method. [Result] As for heavy metal Cd, the highest level of Yunyan 85 was 1.18 mg/kg, and the highest level of Hongda was 1.65 mg/kg; as for heavy metal Cr, the highest level of Yunyan 85 was 5.96 mg/kg, and the highest level of Hongda was 4.95 mg/kg. [Conclusion] The contents of Cd and Cr show large difference in fluecured tobacco varieties and Panxi area.
Key words Fluecured tobacco; Heavy metal; Cd; Cr; Panxi area
作者简介封俊(1984-),男,四川仁和人,助理农艺师,从事烤烟研究。 收稿日期20141119
重金属是植物非必需元素,会对植物的生长造成伤害,表现出叶片褪绿、生长迟缓、植株矮小、产量下降甚至死亡等毒害症状[1]。重金属会抑制烟株的光合作用、酶活性、促进ATP降解、改变细胞膜的通透性、损伤遗传物质DNA等,影响烤烟的生长和发育[2]。研究表明,在Cd污染下,烟叶中总氮、烟碱含量逐渐降低,还原糖含量下降,不利于优质烟叶的形成。随镉浓度的增加,烤烟烟叶中的糖碱比和氮碱比升高,化学成分组成趋于不协调,不利于烟叶