调亏灌溉及其对烟草生长发育的影响研究

采用蒸渗仪控制试验,研究了调亏灌溉对烤烟生长发育及耗水特性的影响.结果表明,适度的亏水条件对烤烟的株高、叶面积指数和产量影响并不明显,而在伸根期、旺长期和成熟期土壤含水量为田间持水量的60%,80%,70%时其调亏处理对提高烟叶产量效果明显,为较佳的亏水处理方法.

Regulated deficit irrigation and its effects on growth of tobacco

The lysimeter experiment was performed for study of effect of regulated deficit irrigation on the growth and water consumption of flue-cured tobacco.The results show that the appropriate water deficit condition does not have obvious effects on the height,leaf area index,and yield of tobacco,while regulated deficit irrigation with the lower limit of water content set to be 60%,80% and 70% at root extending stage,strongly growing stage,and mature stage,respectively,can greatly improve the yield of tobacco,and it is an effective water deficit treatment method.