烘烤变黄期温湿度对上部烟叶烤后化学成分综合评价的影响

Effect of Yellowing Temperature and Humidity on Comprehensive Evaluation of Chemical Composition of Upper Tobacco Leaves Roasted

采用二次饱和D-最优回归设计试验,研究云烟87上部叶变黄阶段烘烤环境与烤后烟叶化学成分多项指标综合评分的关系。结果表明,不同因素对化学成分综合得分的影响表现为温度效应>温度、干湿温差交互效应>干湿温差效应;干湿温差恒定条件下,温度效应方程Y_(1)=83.59–0.89X_(1)+6.35X_(1)^(2),即随温度的升高化学成分综合得分呈先降低后增加变化趋势,当温度X_(1)=39.21℃时,综合得分Y_(min)=83.56;温度恒定条件下,干湿温差效应方程Y_(2)=83.59+3.32X_(2)–4.63X_(2)^(2),即随干湿温差的增加化学成分综合得分呈先增加后降低变化趋势,当干湿温差X2=3.72℃时,Y_(max)=84.19;在温度、干湿温差交互效应条件下,上部烟叶变黄阶段以温度36~36.75℃(干湿温差2~4℃)、41.3~42℃(干湿温差3.5~5℃)化学成分综合得分较高。从烟叶化学成分综合得分来看,本研究以干球温度42℃、湿球温度37.0℃、相对湿度69%为烤后上部烟叶质量的最佳温湿度组合。

The quadratic saturated D-optimal regression design experiment was used to study the relationship between the curing environment and the comprehensive score of chemical components of Nicotiana tabacum leaves in the yellowing stage of Yunyan 87.The results show that the influence of different factors on the comprehensive score of chemical components is temperature effect>temperature,dry-wet difference interaction effect>dry-wet temperature difference effect;Under the condition of constant wet-dry difference,the temperature effect equation Y_(1)=83.59–0.89X_(1)+6.35X_(1)^(2),that is,with the increase of temperature,the comprehensive score of chemical components first decreases and then increases.When the temperature X1=39.21℃,the comprehensive score Ymin=83.56;Under the condition of constant temperature,the equation of dry-wet difference effect Y2=83.59+3.32X2–4.63X22,that is,with the increase of dry-wet difference,the comprehensive score of chemical components first increases and then decreases.When the dry-wet difference X^(2)=3.72℃,Ymax=84.19;Under the interactive effect of temperature and dry-wet difference,the comprehensive score of chemical components in the yellowing stage of upper tobacco leaves was higher when the temperature was 36–36.75℃(dry-wet difference was 2–4℃)and 41.3–42℃(dry-wet difference was 3.5–5℃).According to the comprehensive score of chemical composition of tobacco leaves,dry bulb temperature of 42℃,wet bulb temperature of 37.0℃and relative humidity of 69%are the best combination of temperature and humidity for the quality of upper Nicotiana tabacum leaves.