The water requirements for several crops in Guizhou were calculated by adopting FAO recommended (formula) and using the climatic data of Guizhou and then water use efficiency of several crops was analyzed.

• 根据搜集到的气象资料 ,采用FAO(联合国粮农组织 )推荐的作物需水量公式 ,计算贵州几种主要作物的需水量 ,并对其水分生产效率进行分析。