1.冬季白地储水灌溉:冬灌水量以60—80公方为宜。2.拔节灌:玉米从拔节开始,生长特别迅速,需水量增大,如果缺水会形成生理干旱,生长瘦弱,叶色枯黄。据甘谷试验站的观测:若土壤水分降到田间持水量的50%以下,作物就发生卷叶。同一地段,同时播种的二块地,灌水前苗生长一致,灌后观测,早灌四天的比迟灌的苗高5寸多,而且生长良好。迟灌的后期一直不好,表现瘦弱,后期 1. Winter white ground storage irrigation: winter irrigation amount of 60-80 square is appropriate. 2. Jointing Irrigation: Corn from the beginning of jointing, growth particularly rapidly, water demand increases, if the lack of water will form a physiological drought, the growth of thin, yellow leaves. According to the Gangwon test station observations: If the soil moisture to 50% of the field below the water volume, the occurrence of leaf curling crops. The same lot, at the same time sowing two plots before the watering growth consistent, irrigation observation, early irrigation four days than the late seedling height of more than 5 inches, and good growth. The late late irrigation has been poor, the performance of thin, late