晾制密度对雪茄烟主要含氮化合物变化规律的影响

为全面把握雪茄烟叶晾制过程中氮代谢产物的变化规律,以制定合理的调制工艺,以雪茄烟品种'Gu-5'为试验材料,研究不同晾制密度(40、60和80片·杆-1)对雪茄烟叶主要含氮化合物变化规律的影响.结果 表明,在各晾制密度下,烟叶各类含氮化合物变化趋势较为一致.其中,总氮含量变化呈“双峰曲线”,晾制结束时含量最低;可溶性蛋...

Effect of Drying Density on Change of Main Nitrogen Compounds in Drying Process of Cigar Tobacco

In order to fully grasp the changes of nitrogen metabolites during the drying process of cigar tobacco leaves, to formulate a reasonable modulation process, the cigar tobacco variety ‘Gu-5’ was used as material to study the effects of different air-drying densities (40, 60 and 80 pieces·rod^-1) on the changes of the main nitrogen compounds in cigar tobacco leaves. The results showed that, under different air-drying densities, the changing trends of various nitrogen-containing compounds in tobacco leaves were basically consistent. Among them, the change of total nitrogen content showed a “bimodal curve”, and the total nitrogen content was the lowest at the end of air-drying; soluble protein degradation mainly occurred during the wilting phase and the yellowing phase, and the accumulation of amino acids proceeded with protein degradation simultaneously, showing a "fast-slow-fast" variation trend; the total alkaloid content decreased slightly; nitrate did not change much between before and after air-drying. Among different air-drying densities, total nitrogen, protein and alkaloids of tobacco leaves were degraded the fastest under the treatment of 40 pieces·rod^-1, and the three chemical components all reached the lowest value at 25 d after air-drying; amino acids content was fully accumulated during air-drying process and eventually reached 7.61 mg·g^-1; its nitrate content was always the lowest during the whole air-drying process. Taken together, the drying density of 40 pieces·rod^-1 was more conducive to improving the quality and industrial availability of cigar tobacco leaves.