Effects of Different Potassium Chloride Application Measures on Upper Leaf Yield and Quality of Flue-cured Tobacco
[Objective]To explore the potassium chloride application measures suitable for Luzhou tobacco planting area and further improve the regulation technology of upper tobacco leaves in the field.[Method]A field experiment was conducted with'Zhongchuan 208'as the test material.Four potassium chloride application rates of 30,60,90 and 0 kg/hm2 were set.The ratio of base fertilizer to topdressing was 5:5.The topdressing period was set at 30 and 50 d after transplanting,with a total of seven potassium chloride application methods.The changes of agro-nomic characters,SP AD value,economic characters,chemical composition and physical characters of upper tobacco leaves were analyzed.[Re-sult]Compared with no application of potassium chloride,the application of potassium chloride increased the yield,output value,average price and the proportion of medium and high-grade tobacco by 3.11％-9.17％,6.12％-19.29％,2.79％-12.92％and 4.01％-18.25％respectively.The color,maturity,body,oil content and chroma of flue-cured tobacco were improved,and the comprehensive score was increased by 1.15％-8.30％.[Conclusion]Applying 30 kg/hm2 potassium chloride as base fertilizer and applying 30 kg/hm2 after transplanting for 50 days has the highest economic benefit.The appearance quality,chemical composition and physical properties of the upper tobacco leaves after baking get the highest score.
万方数据
维普
