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通过盆栽试验研究了5种不同的烤烟品种对重金属镉(Cd)与铅(Pb)的吸收累积差异.结果表明,土壤Cd浓度2mg/kg时,云87品种的生物量耐性指数、各器官Cd含量与累积量及烟叶转运系数最高,且显著高于红大品种;其余品种居中;不同品种各器官Cd分配规律从多到少为烟叶、茎、根.土壤Pb浓度500mg/kg时,KRK26品种的生物量耐性指数及各器官Pb含量与累积量均较高,红大品种最低;其中根、茎的Pb含量KRK26品种显著高于其它品种,烟叶Pb含量品种间差异不显著;茎、叶转运系数以云87与红大品种显著较高;不同品种各器官分配规律从多到少均为根、叶、茎.
The pot experiment was conducted to study the accumulation differences of Cd and Pb in five different flue-cured tobacco cultivars.The results showed that when the soil Cd concentration was 2 mg / kg, the biomass tolerance index, Cd The content and cumulant and the leaf translocation coefficient of tobacco were the highest, which were significantly higher than that of the red variety; the rest of the varieties were middle; the distribution of Cd in different organs varied from more to less tobacco leaves, stems and roots. When the soil Pb concentration was 500mg / kg, The Pb tolerance and the content of Pb in all organs were higher than those of other cultivars. The contents of Pb and KRK26 in roots and stems were significantly higher than those in other cultivars. Coefficient cloud 87 and red varieties were significantly higher; different varieties of organs distribution rules from more to less are roots, leaves, stems.