| 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. |