铅对烤烟K326和红花大金元生长和品质的影响

选用烤烟K326和红花大金元,在不同铅含量(0、300、500 mg/kg)土壤进行栽培试验,测定烟株铅含量,比较烤烟农艺性状、生理指标、品质的差异,探讨铅对烤烟生长和品质的影响.结果表明:K326在铅含量较低时农艺性状各指标、硝酸还原酶活力和根活力保持较高水平,铅吸收较少,在铅含量较高时农艺指标及品质指标明显减小;红...

Effect of Pb stress on growth and quality of K326 and Honghuadajinyuan flue-cured tobacco

This paper is an attempt to discuss the effect of Pb stress(0, 300, 500 mg/kg)on the growth and quality of K326 and Honghuadajinyuan (Hongda) flue-cured tobacco. Two species of flue-cured tobacco K326 and Hongda were selected to compare the tobacco agronomic traits, physiological, differences in quality indicators and content of Pb in plants and distribution in different soil with different Pb concentration in cultivation experiments. The result showed that the K326 was in the lower concentration of Pb, keeping a high level of agronomic traits, nitrate reductase and root vigor but absorbing less lead while high concentration of the Pb indicators of agronomic and quality indicators significantly reduced. The Hongda indexes of agronomic traits, nitrate reductase and root vigor less were affected by the Pb stress, showing strong tolerance with Pb. Its adaptability to Pb stress was better than that of the K326, however it also had strong absorption of Pb.