夏玉米是我省主要秋粮作物,多与冬小麦倒茬种植,其生长期短又适逢雨季,由于降水时间和数量分布不均,生育期中往往出现干旱,以至影响玉米生长和产量,因此,掌握夏玉米生长及耗水规律,因地制宜,及时适量灌溉,对夺取夏玉米高产,低成本是十分必要的。近几年来就这个问题进行了研究,试验条件是上断天雨、下绝地下水、中上等肥力的测坑中进行的,并结合大田试验。设四个处理,其土壤水分下限分别控制在田间持水量 Summer maize is the main autumn crop in our province and is mostly planted with winter wheat. It has a short growth period and coincides with the rainy season. Due to the uneven distribution of precipitation time and quantity, drought often occurs during the growth period, which affects the growth and yield of maize. Therefore, Corn growth and water consumption laws, according to local conditions, timely irrigation, the acquisition of summer maize high yield, low cost is very necessary. In recent years, this issue has been studied, the test conditions are off the rain, under the groundwater, middle and upper fertility test pit carried out, combined with field trials. Set four treatment, the lower limit of soil moisture were controlled in the field water capacity