| Water stress is the most popular environment menace that affects crop production,and diagnosis of water deficit is very important to the development of irrigation and precision agriculture.In plants,there is an ecological and physiological mechanism of adaptability to soil water stress,which provides the signal and basis for the diagnosis of water deficit.In this paper,the research advance in diagnosis of crop water deficit is summarized from the aspects of soil index,meteorology index and crop index,the advantages and disadvantages of different methods are discussed,and the problems faced in the study application are also analyzed. |