By applying the dynamic moisture adsorption method to study the moisture absorption and desorption characteristics of different categories of tobacco,the equilibrium moisture content,differences in moisture absorption and desorption rates,and the effects of different temperatures on the moisture absorption and desorption of tobacco were compared.The results showed that:①Under the same environmental temperature and humidity conditions,at a temperature of 26 ℃ and a relative humidity of 50％ ,different cut tobacco was in a dehumidification state.The dehumidification rate of thin and expanded cut tobacco was significantly faster than other cut tobacco in the initial stage.However,at a temperature of 26 ℃ and a relative humidity of 65％ ,different cut tobacco was in a hygroscopic state,and the dehumidification rate of thin and expanded cut tobacco was slow.Among them,the equilibrium moisture content of the thin slice silk was the smallest,followed by the expanded silk,the formula leaf silk and single grade leaf silk were in the middle,and the stem silk is the largest.②Under different environmental temperature and humidity conditions,at relative humidity of 40％ and 50％ ,the formula tobacco leaves are all in a dehumidifying state.At relative humidity of 60％ ,the formula tobacco leaves were basically in an equilibrium state.At relative humidity of 70％ ,the formula tobacco leaves are all in a hygroscopic state.In summary,humidity had a significant impact on moisture absorption,desorption rate,and equilibrium moisture content,while temperature also had a certain degree of influence on moisture absorption,desorption rate,and equilibrium moisture content.The equilibrium moisture content of different cut tobacco increases with the increase of relative humidity.When the relative humidity was the same,as the temperature increases,the equilibrium moisture content of the formula leaf silk showed a pattern of first increasing and then decreasing.
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