一、烘烤的变黄阶段1.变黄前期.关严天、地窗后,点火,尽快把温度升到37℃。使烟叶受热出汗变软,加快变黄烤房中下二棚干、湿球温度差要保持1—2℃。然后将干球慢慢从37℃升到40℃。当变黄前期结束时,烤房内下二棚烟叶已有2—3成变黄,叶片凋萎皮软。主脉尚不软,还可折断。此时可转入变黄中期。 First, the yellowing phase of baking 1. The first yellowing. Off Yan Tian, ​​window, ignition, the temperature rose to 37 ℃ as soon as possible. So that the sweat soften the leaves of tobacco, speeding yellowing barns in the next shed dry, wet bulb temperature difference to maintain 1-2 ℃. Then slowly dry the ball from 37 ° C to 40 ° C. When the yellowing of the end of the previous period, barn tobacco under the shed has been 2-3 into the yellowing, leaf wilting soft. The main pulse is not soft, but also broken. At this point can be transferred into the medium yellow.