A method for improve the availability of upper tobacco leaves

The invention discloses a method for improving the availability of upper tobacco leaves, which comprises the following three steps: first, judging the maturity standard of upper tobacco leaves of flue-cured tobacco; 2, postponing the harvest period when the mature standard is reached; 3, performing stratified baking after harvesting: controlling wet bulb temperature and temperature difference between dry bulb and wet bulb in yellowing period, prolonging yellowing period time, dehumidifying at high speed before fixing color, and controlling total baking time. The first step discloses a new accurate judgment method of the upper tobacco leaf maturity standard. The second step includes: S1, control time limit; S2, harvest time point; S3, harvest selection; S4, collecting and shipping. The third step includes: S1, controlling the wet bulb temperature and the temperature difference between the dry bulb and the wet bulb; S2, prolonging the yellowing period time; S3, dehumidifying at high speed before fixing color; 4