1987年我市玉米种植面积为278.4万亩,单产336.65公斤,最高单产781.5公斤,面积2.03亩,粗略统计这块高产田施肥量每亩折纯N34.855公斤,P16.875公斤,K5.875公斤。我校2亩夏玉米试验田平均亩产594公斤,其中4个小区折亩产682.5公斤,最高一个小区折亩产722.2公斤,亩施肥折纯N17.55公斤、P1.75公斤、K2.35公斤。达到增产节本的目的。取得高产的主要手段:采用高密度、使用玉米健壮素,起到控制株高、降低穗位、防止倒伏的作用。 In 1987, the corn planting area in our city was 2,784,000 mu with a yield of 336.65 kilograms and the highest yield was 781.5 kilograms and the area was 2.03 mu. The gross yield of this high-yielding field was roughly N34.855 kg, P16.875 kg, K5.875 kg. Our school 2 acres of summer corn experimental field average yield of 594 kilograms, of which 4 plot yield per mu 682.5 kilograms, the highest area of ​​?? a yield of 722.2 kilograms per mu fertile off pure N17.55 kilograms, P1.75 kilograms, K2.35 kilograms . Achieve the purpose of increasing production costs. The main means to achieve high yield: The use of high-density, the use of corn hormone, play control of plant height, reduce ear position, to prevent the role of lodging.