Studies on Limited Irrigation and Water-saving Cultivation in Haihe Lowland Plain

In the light of the existing status of shortage of water resources and increasingly intensified drought in Haihe Lowland Plain,systematic studies were carried out on water dynamics of the limited irrigation farmland,growth and development of the main crops and their fertilizer and water repuirements as well as fertilizer-water combination principles,Through adjusting crop distribution,optimizing cropping patterns,selecting anti-drought and fertilizer-adaptable varieties,using water and fertilizer monitoring and implementing tillage practices for anti-drought and water-saving and ect.,a series of techniques for approaches on limited irrigation were developed with yield stably increased and water use efficiency doubled.