旱塬地膜玉米播期密度施肥量试验

Experiment on sowing time density and fertilizer amount of corn covering with plastic film in dry land

采用回归正交旋转组合设计和计算机模拟选优方法,优化出了旱塬地区地膜玉米667m2产量750kg以上的适宜播种期为4月6-11日,密度为4000～4200株/667m2,施肥量为N8.39kg/667m2、P2O54.59kg/667m2,经反馈验证,优化方案切实可行。

Using orthogonal regression rotational fabricate design and simulated selection method with computer to get the yield of corn covering with plastic film over 750kg/667m^2, the result is that the optimal sowing time is April (4-11);the proper density is about 4000～4200 stems/667m^2; and the fertilizer applying amount is (N 8.39kg/667m^2,)P_2O_5 4.59kg/667m^2.Back coupling shows the scheme is practical.