Effect of Different Loading Methods on the Color, Phenolic Compounds and Antioxidant Properties of Cured Tobacco Leaves
[Objective] To investigate the effects of different loading methods on tobacco leaf quality.[Method] Using loose leaves,smoke clamp and smoke basket-holding,color,phenolic compounds and their antioxidant capacity of flue-cured tobacco leaves were studied.[Resuit] The results showed that L*,a* and b * value of tobacco leaves by smoke clamp and basket-holding loading methods were higher than those of loose leaves loading method,and no significant differences were found for a * and b * value,while for L* and h value,distinct differences were existed among three loading methods.Total phenolic content and chlorogenic acid content of tobacco leaves by basket-holding loading were much higher followed by smoke clamp and loose leaves (P < 0.05),however,rutin content was less distinct different.The order of the antioxidant properties,such as DPPH free radical scavenging activity and reducing powder,of tobacco leaves treatment by different three loading methods was smoke basket-holding > smoke clamp > loose leaves,and a positive relationship was found between antioxiang property and total phenolic content and chlorogenic acid content.[Conclusion] In view of tobacco leaves quality and antioxidant property,loading method of smoke basket-holding would be the better choice.