Abstract: In order to know the field effect of irrigation amount of emergency water on the summer corn,four irrigation levels with spray irrigation were set up,which was carried out on ZD958 after sowing to study the response of the soil,corn growth and development to irrigation. The result showed that soil moisture added with the increased irrigation amount,difference of the soil water content emerged at the beginning of the soil layer of 20-30 cm and obviously increased water content appeared in the deeper soil layer. Less irrigation water made the germination rate of maize,leaf development process,leaf area,dry matter weight,plant height,ear height and its uniformity decline,accompanied with delayed tasseling and silking time and reduced production,but at the same time,deep root length of the corn increased,which contributed to absorption for the deeper soil moisture,and another,the duration of tasseling and silking shortened. Under high irrigation water conditions,corn production increased significantly,but irrigation efficiency decreased,less difference of grain production was generally achieved with irrigation amount of 45 m² and 20-30 m²,furthermore more,more irrigation led to low ground temperature that limited the seedling rate of maize to a certain extent. Therefore,at the level of rainfall type of this year,more irrigation amount can significantly improve maize growth and development,emergence potential can be raised at irrigation amount 30 m³,and that not only add yield but also keep better irrigation efficiency.

Key words: Corn, Irrigation amount, Yield

CLC Number: 

• S513.03