Effects of soil moisture on water consumption,yield and quality of flue-cured tobacco

Water consumption law is a basis for designing irrigation systems and determining irrigation frequency and amount.Lysimeter experiments were performed to study the effects of different water treatments on water consumption,yield and quality of flue-cured tobacco at different growth stages.The results show that the appropriate water consumption at the root extending stage,vigorous growing stage and maturing stage are 46mm,144mm and 82mm,respectively,with a higher yield and a more suitable chemical component content in tobacco leaves.Therefore,the low limit of relative soil water content should be controlled at 60%,80% and 70%,respectively,at the root extending,vigorous growing and maturing stages.