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烤烟需水特征与烟田土壤水分变化状况对烤烟生长发育、生理生化过程、烟叶的品质特征和产量都有显著的影响。通过田间试验,研究优质烤烟需水特征和各生育期土壤水分的动态变化,结果表明,烤烟生长季内需水量具有明显的阶段性:伸根期消耗少,旺长期明显升高,成熟期逐步下降,烤烟需水特征与烟株的生长趋势相一致。烤烟伸根期、成熟期土壤含水量大于烤烟的需水量,需要注意排水,而旺长后期和成熟前期由于阶段性干旱,土壤含水量小于烤烟的需水量,这一时段应及时进行补灌。
The characteristics of water requirement of flue-cured tobacco and the change of soil moisture in tobacco field had significant effects on the growth and development, physiological and biochemical processes, quality characteristics and yield of tobacco. The field experiment was conducted to study the characteristics of water demand of high-quality flue-cured tobacco and the dynamic changes of soil moisture in each growth period. The results showed that the water requirement of flue-cured tobacco increased significantly in the growing season: less rooting, significantly increased in long-term and lower in mature The characteristics of water requirement of flue-cured tobacco are consistent with the growth trend of tobacco plants. During the period of root growth and maturity, soil water content of flue-cured tobacco is greater than that of flue-cured tobacco, which requires attention to drainage. However, due to the phased drought and soil moisture content in late and early mature stage, the water content in flue-cured tobacco should be less than that of flue-cured tobacco.