土壤水分对烤烟耗水特征及烟叶产量和品质的影响

烤烟需水规律是制定烤烟灌溉制度、确定灌溉次数及灌溉量的前提.为此,在蒸渗仪条件下进行了不同水分处理的烤烟各生育期耗水量及烟叶产量和品质的试验.试验结果表明,当烟叶的产量、品质达到较优水平时,烤烟伸根、旺长、成熟各生育阶段耗水量分别为46 mm,144 mm和82 mm,土壤相对含水量下限灌溉指标应分别控制在60%,80%和70%左右.

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.