湖南烤煙煙堿含量空間分布特征及與香吃味的關(guān)系
Spatial Distribution of Nicotine Content in Flue-cured Tobacco Leaves in Hunan Tobacco Growth Regions and Its Relationship with Aroma and Taste
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摘要: 采用連續(xù)流動法測定了煙葉煙堿含量以及對評吸質(zhì)量的量化評定,，研究了湖南烤煙煙堿含量的空間分布特征及煙堿含量與煙葉香吃味評價指標(biāo)間的量化關(guān)系,。結(jié)果表明，湖南主產(chǎn)煙區(qū)B2F,、C3F,、X2F 3 個等級煙葉煙堿含量均值分別為3.90%、3.10%,、2.15%,，其中含量大于3.5%的樣本分別占73.51%、24.14%,、2.01%,，上部煙葉煙堿含量偏高；在區(qū)域差異方面,，湘西北煙區(qū)煙葉的煙堿含量比湘南高,，在空間分布上有從西北部高值區(qū)向南部逐漸遞減的趨勢。煙葉煙堿含量與香氣量,、雜氣,、濃度、刺激性和余味分值呈直線關(guān)系,，與香氣質(zhì),、香味、勁頭,、吃味分值和評吸總分呈曲線關(guān)系,。隨著煙葉煙堿含量增加，煙葉的香氣量和濃度增高,，雜氣和刺激性增加,，余味變差；當(dāng)煙葉煙煙堿含量在2.5%～3.5%范圍內(nèi),，香味和吸味均較佳,，煙堿含量在3.0%時評吸質(zhì)量最佳。Abstract: The nicotine contents of flue-cured tobacco samples were determined by continuous flow method, and the sensory quality was assessed quantitatively to study the spatial distribution characteristics of nicotine contents and its quantitative correlations with the evaluation indices of aroma and taste. The results showed that the mean value of nicotine content in flue-cured tobacco leaf of B2F, C3F, X2F was 3.90%, 3.10%, 2.15%, respectively. The samples with nicotine content above 3.5% accounted for 73.51% in B2F,24.14% in C3F, 2.01% in X2F. The nicotine content in upper leaves was higher in partial areas of Hunan Province. The nicotine content of flue-cured tobacco leaf was higher in the northwest Hunan than the south, and decreased gradually from northwest to south. Nicotine content exhibited a linear correlation with aroma volume, offensive odor, density, irritancy and after-taste, yet a curvilinear with aroma quality, total aroma, strength, taste and sensory quality. The increase of nicotine content might lead to the increasing aroma volume and density, the enhancing offensive odor and irritancy, and the unfavorable after taste. The aroma and taste was favored when nicotine content ranged from 2.5% to 3.5%, while the optimum sensory quality appeared when the nicotine content was 3.0%.
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