The Effects Of Different Ecological Conditions On Flue-cured Tobacco Smoking Quality In Shandong Province

Based on the soil and tobacco leaf samples gathered on some fixed position in Shandong province, the effects of temperature, raincapacity, soil parent material, soil type and altitude for tobacco smoking quality were studied under the different ecological conditions. The results indicated that the temperature resource could fully meet the demands for the production of high-quality tobacco when flue-cured tobacco was transplanted at the end of April or early of May in Shandong province. In this period, the effective accumulated temperature, mean annual temperature, month temperature and number for the days of higher than 20°C had no significant correlation with smoking scores. Probably, the reason was the temperature condition in Shandong province could meet the demand of the flue-cured tobacco's growth or tobacco leaf quality. The correlation between raincapacity in the period of rapid growing or maturing of flue-cured tobacco and tobacco smoking quality was not significant. The reason for this situation might be the centralizing rainfall time and unconspicuous difference of raincapacity in Shandong province. The soil parent materials and the soil types could also affect the smoking quality of tobacco. The results showed that the smoking quality of tobacco planted in soil developed from limestone parent material and grown in cinnamon soil was better. Moreover, the smoking scores of tobacco planted in soil type with low development degree were larger. The smoking quality of Zhongyan 98, K326 and Zhongyan 100 planted in the different type of soils had no visible difference, which showed that their adaptability was better, while the smoking quality of Yunyan 85 planted in limestone cinnamon soil and yellow cinnamon soil was better. The smoking quality of NC89 planted in flood eluvial-cinnamon soil was better than in flood eluvial-brownearch and white browneaech. The correlation between smoking score and altitude was positive and the optimum altitude for the growth of tobacco was 500~600m, and this result indicated that the smoking quality of flue-cured tobacco planted in a mountainous area and hill could be better. The analysis of correlation between smoking quality and soil chemical characteristics showed that enhancing the fertility level of tobacco field, improving the potassium content and reducing the chlorine content in tobacco leaves could improve the tobacco smoke quality.