白肋烟烟碱转化率与生物碱含量及新烟草碱／降烟碱值的关系

Relationship of nicotine conversion rate with individual alkaloid contents and Anat/Nnic in burley tobacco

研究了达白1号和鄂烟1号生长早期烟碱转化诱导后烟叶及调制后烟叶烟碱转化率与生物碱含量和新烟草碱／降烟碱值（Anat／Nnic）的关系．结果表明，烟碱转化率与烟碱含量呈显著负相关关系，与降烟碱含量呈显著正相关关系，随着烟碱转化率的增加，新烟草碱和假木贼碱含量无显著变化．烟碱转化率与Anat／Nnic存在极显著的幂函数关系．早期诱导烟叶的Anat／Nnic在低于0．8时，烟碱转化率开始显著增加，其对应的烟碱转化率为2．5％；调制后烟叶Anat／Nnic在小于1．1时烟碱转化率显著增加，对应的烟碱转化率为2．8％～2．9％．

Burley varieties, Dabai No. 1 and Eyan No. 1, were used to investigate the relationship of nicotine conversion rate with individual alkaloid contents and the ratio of anatabine to nornicotine in ethylene treated leaves and air-cured leaves. The results indicated that nicotine conversion rate had significantly negative correlations with nicotine content, and significantly positive correlation with nornicotine content. With the increase of nicotine conversion, the contents of anatabine and anabasine remained unchanged. Nicotine conversion rate had significant power function relation with Anat/Nnic. For early conversion induced leaves, when Anat/Nnic was below 0.8, the nicotine conversion rate began to increase significantly, and the corresponding conversion rate was 2.5% ; for air-cured leaves, when Anat/Nnic was below 1. 1, the nicotine conversion level began to increase markedly, and the corresponding conversion value ranged from 2.8% - 3.0% for Dabai No. 1 and Eyan No. 1 respectively.