Fuzzy Comprehensive Evaluation of Chemical Components Availability of Upper Tobacco in Jiangxi Based on OPLS-DA
To explore a convenient and effective method for evaluating the industrial availability of chemical components in the upper leaves of flue-cured tobacco,orthogonal partial least squares(OPLS-DA)was used to establish a discriminant model between the main chemical components and sensory quality.Subsequently,combining fuzzy mathematics theory to establish an evaluation method,and the upper tobacco samples in Jiangxi Province in 2023 were classified based on this method.The results showed that the total sugar(26.98％),total nitrogen(2.04％),and potassium(2.46％)contents in the upper leaf samples of Jiangxi flue-cured tobacco were moderate,the sugar/alkali ratio(6.60)was low,and the chlorine content fluctuated greatly according to different production areas.The order of importance of chemical composition on sensory quality was sugar/alkali ratio,nicotine,reducing sugar,chlorine,total sugar,total nitrogen,nitrogen alkali ratio,starch,and potassium.In this study,75 upper leaf samples were selected,among these,33 samples were evaluated as grade Ⅰ,accounting for 44.0％,30 samples were evaluated as grade Ⅱ,accounting for 40.0％,12 samples were evaluated as grade Ⅲ,accounting for 16.0％.This study was directed by sensory evaluation of smoking quality and established a fuzzy comprehensive evaluation model by chemical composition to classify tobacco leaves,providing reference for industrial usability evaluation of upper leaves.
upper leaves of flue-cured tobaccomain chemical componentsOPLS-DAfuzzy comprehensive evaluationsensory qualityfuzzy mathematics
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NSTL
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