Study on Effects of Soil Moisture on Agronomical Characteristics and Yield and Chlorophyll of Flue-cured Tobacco

Flue-cured tobaccos were irrigated at different growth stage.The results showed that the soil moisture content of 65%～85% at rosette stage,45%～75% at faster growing stage,bud stage and maturing stage was the best for the growth of tobacco,the more soil moisture,the higher plant,but disadvantage for roots.So over or less soil moisture content was not good for the formation of yield of flue-cured tobacco;the chlorophyll content was the highest when the soil moisture content was about 65%～75% at rosette stage,75%~85% at faster growing stage and bud stage,35%~45% at maturing stage.