不同仓贮环境对片烟相对含水率与pH值的影响
Influence of relative moisture content and pH value for tobacco strips under different storing conditions
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摘要: 为了提高片烟的醇化质量，降低仓贮成本，选取具有代表性的兴义、贵阳、贵定醇化库，对6个原料基地中部位片烟醇化过程中的相对含水率和pH值变化进行了分析.结果表明：1）醇化库受自然环境温度和空气湿度的影响较大，全年月平均温湿度较高的醇化库加速片烟的自然醇化速度，缩短片烟自然醇化的时间.2）3个醇化库不同香型片烟的相对含水率变化幅度存在显著差异（P<0.05），跨区域贮存的浓香型和清香型烟叶相对含水率的变化幅度明显大于本地生产、本地贮存片烟的相对含水率的变化幅度.3）片烟醇化过程中，3个醇化库不同香型片烟的pH值都持续下降，说明片烟在醇化过程中碱性物质减少，酸性物质增加，其中兴义库的清香型片烟和中间香型片烟pH值下降幅度大于贵阳库和贵定库片烟，但3个醇化库的浓香型片烟pH值降幅差异均不显著.Abstract: With typical mellowing storage in Xingyi,Guiyang and Guiding as samples, the variation of relative moisture content in the process of mellowing and pH of tobacco strips of upper and middle leaves from six raw material base was analyzed to improve the quality of tobacco strips mellowing and reduce the cost of storage.Results showed that, 1) Environmental temperature and air humidity had a large impact on tobacco mellowing storage,the higher annual average monthly temperature and humidity of mellowing storage could increase the speed of tobacco natural aging and reduce the time of tobacco natural mellowing. 2) The different aroma type of tobacco strips in 3 mellowing storage with relative moisture content variation range had significant difference(P<0.05),relative water content variation range in strong flavor type and clean flavor type of tobacco in different storage areas were significantly greater than relative water content variation range in local production and storage. 3) During mellowing, the different aroma type of tobacco strips in 3 mellowing storage with pH value continued to decline, showed that alkaline material reduced and acid material increased after mellowing, pH value in the Xingyi mellowing storage of clean flavor type and middle flavor type tobacco strips declined more than tobacco strips of the Guiyang mellowing storage and Guiding mellowing storage, but pH value decline of strong flavor type tobacco strips in 3 mellowing storage showed no significant difference.
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Key words:
- tobacco strips /
- mellowing /
- relative moisture content /
- pH value
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