Method for characterizing threshold value of tobacco leaf raw material with relatively low applicability in leaf group formula

The invention relates to a method for characterizing a threshold value of a tobacco leaf raw material with relatively low applicability in a leaf group formula. The method comprises the following steps: carrying out contribution degree evaluation on stock raw materials and a standard sample; selecting tobacco leaves of which the contribution degree is less than 86.5 as tobacco leaves of which the applicability is relatively low, and carrying out gradient blending on the tobacco leaves and the standard sample to obtain N test samples; respectively rolling the standard sample and the N test samples, and then carrying out sensory 'A'-'non-A' inspection to determine the threshold value of the tobacco leaves with relatively low applicability. According to the method provided by the invention, a specific contribution degree evaluation process is adopted to determine the threshold value of the low-applicability tobacco leaves through sensory A-non-A inspection after the low-applicability tobacco leaves are detected,