Curing Characteristics of HN2146 a New Variety of Flue-cured Tobacco

PurposeTo clarify the curing characteristics of a new flue-cured tobacco variety HN2146.

MethodBy establishing Yunyan87 as control groups, the characteristics of yellowing, browning, water loss, chlorophyll degradation and polyphenol oxidase (PPO) activity of the middle and upper leaves can be studied by using dark chamber and electric-heated flue-curing barn.

Result(1) In the dark chamber, the yellowing time of HN2146 upper and middle leaves were 48 h and 84 h respectively, the browning time of the upper and middle leaves were 72 h and 120 h respectively. Compared with Yunyan87, the yellowing time of HN2146 was longer while browning time shorter. (2) The proportionality of water loss rate of the upper and middle leaves of HN2146 were 0.43 and 1.24 respectively, both of them were proper; but that of Yunyan87 was better than the upper leaves of HN2146 and worse than the middle leaves of HN2146. (3) At 72 h, the degradation rate of chlorophyll of the upper and middle leaves of HN2146 were 13.68 and 13.03 g/(kg·h) respectively, the degradation amount of chlorophyll were 98.55% and 93.85% respectively, both their chlorophyll degradability are good; the degradation rate of chlorophyll of HN2146 and Yunyan87 were not significant differences. (4) The average value of PPO activity of the upper and middle leaves of HN2146 during curing process were 0.224 U and 0.236 U respectively, they were 15.63% and 13.98% higher than Yunyan87 respectively.

ConclusionThe easy curing potential and the endurable curing potential of HN2146 is good, it is one of variety with great curing characteristics.