When both meanings ofWUE and T/ET were analyzed profoundly, the concept of evapotranspiration efficiency (ETE) which can all-side reflect utilization regime of the environmental water resources was advanced.

• 深入分析WUE和T/ET的内涵,提出蒸散效率(ETE)的概念,能更好地反映植物对环境水资源利用的状况或程度,具有实际意义。