调制期间白肋烟主要物理、化学变化及调制工艺的确定

为进一步明确白肋烟的调制工艺 ,提高白肋烟质量 ,1999- 2 0 0 1年在湖北恩施地区进行了调制期间白肋烟主要物理、化学变化的研究。结果表明 :①白肋烟的调制过程划分为变黄、变褐和干筋 3个时期 ,1天中要求晾房内平均相对湿度变黄期为 70 %～ 80 %、变褐期为 6 5 %～ 75 %、干筋期为 5 0 %～5 5 % ;②烟株失水速率随时间推移逐渐减小 ,变黄期烟株失水量占总失水量的 6 0 %～ 6 5 % ,变褐期为2 0 %左右 ,干筋期为 2 0 %以下 ;③调制过程中烟叶总氮含量变化不大 ,烟碱含量有一定变幅 ,还原糖在调制前期急剧下降 ,后期无明显变化

Curing Technology and Major Physical and Chemical Changes of Burley Tobacco during Curing

In order to determine the right curing technology and improving the quality and usability of burley tobacco, the major physical and chemical changes of burley tobacco during curing were studied from 1999 to 2001 in Enshi, Hubei province. The results showed that 1) the curing process were divided into yellowing, browning and stem|drying stages, the mean relative humidity in the barn in a day during the three curing stages should be held at 70%|80%, 65%|75% and 50%|55%, respectively; 2) the water loss rate was gradually reduced with the lapse of curing time, and the relative water loss ratio of tobacco plants during yellowing, browning and stem|drying stages was 60%|65%, about 20% and below 20%, respectively; 3) total N content of tobacco leaves wasn't clearly varied and nicotine content was changed in a narrow range during curing, reducing sugar was sharply decreased at early stage and wasn't obviously changed at later stage of the curing process.