关键词: 晒黄烟, 调制措施, 含氮化合物

Abstract: In order to improve the quality and safety of yellow sun-cured tobacco, and grasp the change rule of nitrogen metabolism comprehensively and systematically in the curing process, this paper studied the effects of different curing methods on nitrogen compounds in yellow sun-cured tobacco during curing stage. The results showed that the total nitrogen content declined 9 d ahead of curing process, then slightly increased, but there were not many changes. Soluble protein was degraded mainly during the prophase and metaphase of the curing. The content of free amino acid increased first then decreased, and the accumulation speed showed the changing rule of “fast-slow-fast”. The content of alkaloids changed a little during the curing process. The final content of nitrate was lower than that in the beginning of curing. Compared with different curing measures, the treatment of water loss contributed to the full degradation of soluble protein, accumulation of free amino acids and rational transformation of nitrate.

Key words: yellow sun-cured tobacco, curing method, nitrogen compounds