西南煙區(qū)烤煙pH 分布特點(diǎn)及與感官品質(zhì)的關(guān)系
The pH Distribution of Flue-cured Tobacco Leaves in Southwest China and its Relationship with Sensory Quality
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摘要: 以西南煙區(qū)2002—2005 年的208 份烤煙樣品為材料,，分析pH 在不同部位,、不同年份、不同產(chǎn)區(qū)間的變異特點(diǎn),，并對(duì)烤煙pH 與感官品質(zhì)進(jìn)行了回歸分析,。結(jié)果表明，西南煙區(qū)烤煙pH 主要集中在4.6～5.2 范圍內(nèi),，平均為(4.90±0.16),，變異系數(shù)為3.35%；pH 在部位,、年份和產(chǎn)區(qū)間均存在顯著差異,。當(dāng)烤煙pH 在4.5～5.5 范圍內(nèi)，pH 與香氣質(zhì),、余味,、雜氣、刺激性,、燃燒性和評(píng)吸總分均存在顯著的回歸關(guān)系,，而與香氣量、勁頭,、濃度和灰色的回歸關(guān)系則未達(dá)到顯著水平,。Abstract: We used 208 of flue-cured tobacco leaf samples from Southwest China in 2002-2005 to study the distribution of pH in flue-cured tobacco leaves among different leaf positions, harvest years and tobacco growth regions, and analyze the relationship by regression between pH and sensory quality. The results showed that leaf pH in southwest China ranged between 4.6 and 5.2, with the mean of 4.90, standard deviation of 0.16 and variation coefficient of 3.35%. The leaf pH had significant difference among different leaf positions, harvest years and tobacco growth regions. When pH changed from 4.5 to 5.5, there were significant regression relationships between pH and quality of aroma, after taste, offensive taste, biting taste, combustibility as well as total score, but the regression relationships between pH and volume of aroma, strength, density as well as ash were not significant at 5% level.
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