密集烘烤不同变黄温湿条件对烟叶中性致香物质的影响*

 采用河南农业大学设计的电热式温湿自控密集烤烟箱，研究了不同变黄温湿条件对烟叶致香物质的影响。结果表明，低温中湿变黄处理（干球温度38 ℃，相对湿度85%~80%）能提高烟叶中性致香物质的含量。苯丙氨酸类、美拉德反应产物类、类胡萝卜类、新植二烯以低温中湿变黄处理最优，中性致香物质的总量也得到提高，其中对烟叶香味品质有重要作用的苯甲醇、苯乙醛、苯乙醇、糠醛、糠醇和2-乙酰基吡咯、β-大马酮、香叶基丙酮、二氢猕猴桃内酯、巨豆三烯酮Ⅱ、巨豆三烯酮Ⅳ、3-氢基-β-二氢大马酮、茄酮的含量均有不同程度的提高。可见低温中湿变黄处理能提高烟叶中性致香物质的含量，有利于改善烟叶的内在品质。

Effects of Different Temperature and Humidity Yellowing Conditions on Neutral Aroma Constituents of Tobacco Leaves during Bulk Curing

The Effects of different temperature and humidity yellowing conditions on the aroma constituents of tobacco leaves during bulk curing were studied by using the electric-heated flue-curing barn designed and made by Henan Agricultural University. The result showed that the treatment of low temperature and medium humidity yellowing condition(dry－bulb temperature 38 ℃, relative humidity 85-80%) could increase the content of neutral aroma constituents. The contents of phenylalanine products, Maillard reaction products and carotenoid were the highest in the condition of low temperature and medium humidity yellowing among the different treatments, the total content of neutral aroma constituents was also increased and the contents of benzyl alcohol, phenyl acetaldehyde, phenyl ethyl alcohol, furfural,furfuryl alcohol, acepyrrol, β-damascenone,geranyl acetone, dihydroactinolide, megastigmatrienoneⅡ, megastigmatrienoneⅣ, 3-hydrogen-β-damascone and solanone which were of great importance to tobacco leaf fragrance were increased in various degree. It was obvious that the treatment of low temperature and medium humidity yellowing could improve the content of aroma constituents of tobacco leaves, and it was in favor of the internal quality of tobacco leaves.