Effects of Different Fertilization Measures on Chemical Composition and Quality of Flue-cured Tobacco

[Objectives] The paper was to obtain fertilizer varieties and fertilization techniques that meet the special nutritional requirements of characteristic tobacco varieties in Mengyin tobacco area. [Methods] With the local main plant variety NC102 as the test material, the effects of combined application, dosage and application methods of different types of organic fertilizers, compound fertilizers and potassium fertilizers on chemical composition and quality of NC102 flue-cured tobacco leaves were studied. [Results] Under the premise of reducing the amount of fertilizer applied, the slow-release integrated fertilizer increased the sugar-alkali ratio and potassium-chloride ratio, and reduced the sulfur content of tobacco leaves, but it did not significantly improve the sensory quality of tobacco leaves. Increasing the application of organic fertilizer made the sugar-alkali ratio and potassium-chloride ratio more coordinated, reduced the sulfur content and improved the sensory quality of tobacco leaves. Microbial agents significantly increased the sugar-alkali ratio in tobacco leaves, and had obvious effects of increasing potassium and reducing chlorine. Different types and application methods of potassium fertilizers had obvious effects on sensory quality of tobacco leaves. Increasing the application amount of potassium fertilizer and later topdressing significantly improved the potassium content and sensory quality of tobacco leaves. [Conclusions] The study provides a basis for balanced fertilization in characteristic flue-cured tobacco production in Mengyin tobacco area.