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在两种施肥条件下,研究了不同生育时期水分亏缺对盆栽烤烟生长、氮钾含量和水分利用的影响。结果表明,在相同施肥水平下,与对照(正常灌水)相比,各水分亏缺处理对烟叶生长、氮钾含量和水分利用均有不同程度的影响。其中施氮量为0.1gkg-1土,N∶P2O5∶K2O为1∶1∶3时,伸根期轻度水分亏缺处理对烟叶产量和水分利用效率综合效益较好,分别比对照增加28.9%和31.2%;而旺长期和成熟期进行水分亏缺处理提高效果则不明显。因此,本实验条件下,在较低施肥条件下进行伸根期轻度水分亏缺处理(占田间持水量的50%～60%)可明显提高烟叶产量和水分利用效率。
Under the two fertilization conditions, the effects of water deficit during different growth stages on the growth, nitrogen and potassium content and water use efficiency of potted flue-cured tobacco were studied. The results showed that under the same fertilization level, the water deficit treatments had different degrees of effects on the growth, N, K and WUE compared with the control (normal irrigation). Among them, nitrogen application rate was 0.1gkg-1 soil and N: P2O5:K2O was 1: 1: 3, the comprehensive benefit of tobacco yield and water use efficiency was better than that of the control % And 31.2%, respectively. However, the effect of water deficit treatment in long-term and mature stages was not obvious. Therefore, under the conditions of this experiment, the treatment of mild water deficit at rooting stage (accounting for 50% -60% of field capacity) could significantly improve the yield and water use efficiency of tobacco leaves.