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大豆:在喷灌的条件下,分枝到花期,土壤湿度为65～80％,最优湿度是70％;花期到鼓粒期,土壤湿度为70～85％,最优湿度是75％;鼓粒期到收获,土壤湿度为65～75％,最优湿度为70％。据铁岭地区试验,大豆按上述方法喷灌,可比一般的地面灌溉增产29.4～40％。玉米:拔节到袖穗大约是20天,“掐脖旱”常在这时出现。这期间是玉米的生长高峰,适宜的土壤湿度为75％;抽穗到灌浆大约是8天,这期间是玉米需水高峰期,一般要补水1～2次,使土壤湿度达到80
Soybean: Under the conditions of sprinkling irrigation, the soil moisture is 65-80%, the optimal humidity is 70%; the flowering period to the drumming stage is 70-85%, the optimum humidity is 75%; Grain to harvest, soil moisture 65 ~ 75%, the optimal humidity of 70%. According to the test in Tieling area, sprinkling soybeans according to the above method can increase the yield by 29.4% to 40% over the general surface irrigation. Corn: Jointing sleeve sleeves is about 20 days, “pinch neck dry” often appear at this time. During this period is the peak of corn growth, suitable for soil moisture 75%; heading to the grouting is about 8 days, during this peak of corn water demand, generally 1 to 2 times to make the soil moisture to 80