利用郑单958为材料,探讨播种时底墒差异对夏玉米生长发育、水分利用及产量的影响,以确定适宜的灌水量。试验设置4个处理,播种后不灌水、播种后立即灌水30毫米、45毫米、60毫米。结果表明,6月中旬播种灌溉底墒水有其必要性;土壤储水量及水分利用效率在不同处理间存在一定的差 Using Zhengdan 958 as material, the effects of different sowing time sowing on the growth and development, water use and yield of summer maize were studied to determine the suitable irrigation amount. Four treatments were set in the experiment. No irrigation was carried out after sowing, and 30 mm, 45 mm and 60 mm were irrigated immediately after sowing. The results showed that it was necessary to sow the irrigation water with soil moisture in mid-June. Soil water storage and water use efficiency were different in different treatments