引进烤烟新品种NC55的烘烤特性研究

摘要

为摸清引进烤烟新品种NC55的烘烤特性,以中烟100为对照品种,研究了成熟烟叶在暗箱条件下的变色特性,烘烤过程中色素含量、水分含量及多酚氧化酶(PPO)活性变化.结果表明,暗箱条件下,NC55变黄快,易烤性好；变黄后开始变褐时间较中烟100长,变褐速度也较慢,耐烤性也好.烘烤变黄期,NC55叶绿素和类胡萝卜素降解量也较大,但低于中烟100,变黄与失水速度较协调；烘烤前期NC55的PPO活性较低,不易发生棕色化反应.品种NC55的烤后烟叶外观质量和经济性状均显著好于中烟100.%Flue-curing characteristics of the new flue-cured tobacco variety NC55 introduced from abroad, which included changes of discoloration property under dark condition,pigments, water content and activity of poly-phenol oxidase( PPO) were studied,with Zhongyan 100 as control,in order to find out the flue-curing characteristics of NC55,a new flue-cured tobacco variety introduced from abroad. The results showed that NC55 performed rapid yellowing and good easy curing potential under dark condition. And the time which was from complete yellowing to come into browning was longer of NC55 was longer than Zhongyan 100. NC55 had low speed of browing and good endurable curing potential. The chlorophyll and carotenoid of NC55 declined rapidly,but the degradation was lower than Zhongyan 100 during curing. The color change during the yellowing stage of Zhongyan 100 was in accordance with water removal. PPO activity of NC55 was lower during the early days of curing, and it would not occur browning reaction. Appearance quality and economic characters of NC55 in cured tobacco leaves were much better than Zhongyan 100.