Abstract: To provide the reference to tobacco heavy-metal elements absorption mechanism research,the experiment was carried out on characteristics of heavy-metal enrichment, transfer and distribution of heavy-metal elements between organs of tobacco. With Zhongyan 103 as material}tobacco samples were acquired,heavy-metal elements in tobacco plant spatial distribution were detected after transplanting 30, 45, 60,75,90 and 110 days. Tobacco root absorption of lead and chromium remained active throughout its living stage,and lead and chromium content in the roots were significantly higher than those of stems and leaves. Tobacco arsenic content in the root has been maintwined at a high level,and was significantly higher than that of stem and leaf. But in 45 days and 75 days(After transplanting),lower leaves arsenic content were the highest. Mercury content in leaves was higher than that in the root and stem. However middle leaves mercury content was significantly higher than that of other parts of tobacco plants in the late growth period. Tobacco varies in absorption and accumulation to different heavy-metal elements.Mercury behaves as late accumulation,and lead,chromium and arsenic to metaphase accumulation. Mercury accumulation and root}o}eaf transfer capability is the strongest among the four elements. Lead and chromium are mainly stored in root,and the storage of arsenic and mercury is almost equally in root and leaf.

Key words: Tobacco, Heavy-metal, Accumulation, Translocation

CLC Number: 

• S572.01