关键词: 交替灌溉;操作方式;节水机理;应用范围

Abstract:

This paper expounds the alternative irrigation technology about its emerging background, operation modes, application efficiency and water-saving mechanism, and prospects the key research fields of this technology in the future. Alternative irrigation technology can significantly increase the water use efficiency (WUE) of crops, improve the quality of products, create a special root system favorable for improving crop WUE, and remarkably reduce evaporation speed under minor decrease of photosynthesis speed. This technology can also optimize the biochemical adjusting organism to drought resistance and improve WUE, and is favorable for improving moisture compensation and nutrients utilization efficiency, and decrease useless evaporation and leakage. The main research orientation in the future will include the adjusting role and mechanism of alternative irrigation to crop procreating process, the  integrated application and mechanism of this technology in intercropping and high density planting.

Key words: alternative irrigation, operation method, water-saving mechanism, application area