杂交油菜新品种万油25优化栽培模式研究

采用三因素二次回归正交旋转组合设计试验,建立了油菜新品种万油25产量（Y）与播期（X1）、施氮量（X2）和密度（X3）间的数学模型。在本试验条件下,三因素对油菜产量影响的顺序是：施氮量〉密度〉播期;经因子水平选优,得出产量在180.00kg/667m^2以上的优化栽培措施为：播期：9月8-14日;施纯氮量：17.179-20.632kg/667m^2;密度：7632-8800株/667m^2。

Studies on Model of high-yield culture for hybrid rape Wanyou25

The mathematical model for the relation between the yield of hybrid rape（ B. napus L ）Wanyou25 and seeding time and application amount of N and planting density was established by means of quadratic orthogonal regressive rotation combination design with three factors and five levels. The experimental results indicate that the order of their influences on the yield was application amount of N （ X2 ） 〉 planting density （ X3 ） 〉 seeding time （XI ） . The optimal cultural methods for the yield of over 132. 53Kg/667m^2 , according to the mathematical model, were that the seeding time should be in September 12-19 and the application amount of N should be 16. 559-19. 655kg/667m^2 and the density should be 7548-8564 plants/667m^2.