烤烟脚叶因光照不多,养分不足。外观似成熟,实际上并未真正成熟,水分较重,属假熟烟叶,若按传统的烘烤方法烘烤,往往出现烟叶变黄后稍见大火就成为核桃木叶现象。这是由于烟叶内部及表面水分还大量 Flue-cured tobacco foot light due to lack of nutrients. Looks like mature, in fact, not really mature, heavier water, is a false cooked leaves, if the traditional baking method of baking, there is often a yellowish tobacco after the fire became the phenomenon of walnut leaves. This is due to the large amount of moisture inside and outside the tobacco