Effect of Different Ratio of Organic to Inorganic Fertilizers on Yield and Quality of K326 Flue-cured Tobacco

To explore the optimum ratio of organic to inorganic fertilizers applied on K326, the effect on agronomic characters, appearance quality, internal chemical compositions and sensory evaluation of the tobacco was studied through field experiments with different ratio of organic to inorganic fertilizers. The results showed when it was applied with 30% organic and 70% inorganic fertilizers, the growth of the tobacco was promoted and the agronomic characters were the best; after flue-cured, the leaf structure, oil content and chromaticity were all improved and the appearance of the tobacco had the best performance; with the increased content of total sugar and reducing sugar and the reduced content of total nitrogen and nicotine, the tobacco tended to have more equal distributions of chemical compositions; the improved quantity and quality of the odor with the decreased pungent odor made the sensory evaluation of the tobacco much better. With 30%:70% applied ratio of organic to inorganic fertilizers, the first and middle class tobacco leaf was increased by 7.7%, average price was increased by 8.9%, and net output value was increased by 9.1%. As mentioned above and based on an overall consideration of input and output efficiency of organic fertilizer, the application of 30% organic fertilizer together with 70% inorganic fertilizer were recommended for K326 flue-cured tobacco, it could improve the availability for commercial value and increase the benefits of tobacco farmers.