分根交替灌溉对烤烟生理特性和烟叶产量的影响

利用射频反射仪(FDR),在人工控水条件下研究了分根交替灌溉对烤烟生长发育、生理特性及烟叶产量和品质的影响。结果表明,分根交替灌溉可增强烟株的根系活力,保持较高的光合速率,降低蒸腾速率,提高叶片瞬时水分利用效率;使烟株的株高和叶面积指数减小,茎粗增加,叶片可溶性糖和可溶性蛋白质含量升高;烟田灌水量节省41.07%,烟叶产量、产值分别提高1.96%和12.16%,水分利用效率提高73.81%。表明分根交替灌溉是烤烟有效的节水灌溉方式。

Effects of root-divided alternative irrigation on physiological characteristics and yield of flue-cured tobacco

The effects of root-divided alternative irrigation on growth,physiological characteristics and yield of flue-cured tobacco were studied under artificial water control by FDR.The results indicated that root-divided alternative irrigation could increase root activities,photosynthesis rate and water use efficiency of tobacco leaf,but decrease transpiration rate;it could reduce the height and leaf area index of tobacco, but increase stalk diameter of tobacco and contents of soluble sugar and protein in tobacco leaves;it saved irrigation water by 41.07%,while increase yield,output value and water use efficiency of tobacco by 1.96%,12.16% and 73.81%,respectively.It was suggested that root-divided alternative irrigation be an effective irrigation method for flue-cured tobacco.