白肋烟烟碱转化率与TSNA含量及烟叶评吸质量的关系

为进一步明确白肋烟烟碱转化对烟草特有亚硝胺(TSNA)及烟叶感官评吸质量的影响,以不同烟碱转化率类型的白肋烟品系为材料,进行了生物碱、TSNA含量检测和原烟感官质量评吸。结果表明:低转化(LC)品系生物碱以烟碱为主,高转化(HC)品系则以降烟碱为主,LC品系比HC品系烟碱含量高107.78%,降烟碱含量则减少93.74%,烟碱转化率下降93.28%。HC品系以亚硝基降烟碱(NNN)含量为主,LC品系以亚硝基新烟草碱(NAT)为主,LC品系的NNN和TNSA总量分别比HC品系下降86.43%和66.61%,但NAT和4-(甲基亚硝胺)-1-(3-毗啶)-1-丙酮(NNK)、亚硝基假木贼碱(NAB)含量及其占TSNA总量的比例高于HC。LC品系的原烟感官评吸质量在香型风格、杂气等方面均优于HC品系,HC品系怪味突出。TSNA总量、NNN与降烟碱及烟碱转化率呈正向直线相关,与烟碱存在负向对数相关;NNK与烟碱的存在正向相关、与降烟碱及烟碱转化率存在负向对数相关;与降烟碱的相关系数均大于转化率和烟碱。为此认为,积极选育和推广种植烟碱转化率低的LC品系,是降低白肋烟TSNA含量和提高烟叶品质的有效措施,同时兼顾对NNK、NAB及NAT的选择与控制亦很有必要。

The Relationship of Nicotine Conversion Rate to TSNA Content and to Smoking Quality of Burley Tobacco

To study the effect of nicotine conversion rate on TSNA Content and Smoking Quality of burley tobacco, taking different types of nicotine conversion strain of burley tobacco as materials, the alkaloid and TSNA content were detected, and sensory quality of raw tobacco smoking were tested. The results showed that LC strains mainly nicotine alkaloids, HC strain was mainly nornicotine, nicotine content than HC strain LC lines high 107.78%, content of nornicotine decreased 93.74%, nicotine conversion rate decreased 93.28%. HC strains with NNN-based, LC strains of NAT-based, LC strains NNN and total TNSA than HC strains respectively decreased 86.43%and 66.61%, but NAT, NNK, NAB content and the proportion of TSNA was higher than HC. LC strains of raw tobacco smoking sensory quality in terms of lfavor style, impurity gases and other miscellaneous lines were better than HC, HC strains highlight the smell. The total amount of TSNA, NNN associated with nornicotine and nicotine conversion rate was straight forward, the negative logarithm associated with the presence of nicotine;NNK positively correlated with nicotine, and had a negative logarithmic correlation with nornicotine and nicotine conversion;the correlation coefifcient were greater than the conversion rate and nicotine. Therefore, it is effective to reduce the content of TSNA of burley tobacco and improve the quality of tobacco leaves by selecting and planting low nicotine conversion rates of LC strains , and it is necessary to choice and control contents of NNK, NAB and NAT .