杂交玉米新品种毕玉4号高产栽培技术模式研究

The Cultivation Model for High-yielding of Biyu 4,a New Hybrid Maize Variety

试验采用二次回归正交旋转组合设计，对毕玉4号栽培技术进行研究，结果表明：≥500kg／667m^2的综合栽培措施为：密度3579～3733株／667m^2，氮肥24．64～27．36kg／667m^2，磷肥17．50～20．18kg／667m^2，钾肥16．43～19．16kg／667m^2。对玉米产量影响程度为N〉K2O〉P2O5〉密度。因此，要获得毕玉4号高产，需重施氮肥，合理施用钾、磷肥及适当的种植密度。

The quadratic regression orthogonal rotational combination design was used to study the cultivation technique for high-yielding of Biyu 4. The results show that the comprehensive cultivation measure for over 500 kg/667m^2 of Biyu 4 includes 3579-3733 plant/667m^2of density, 24.64-27.36 kg/667m^2 of nitrogen, 17.50-20. 18 kg/667m^2 of phosporus and 16.43~ 19.16 kg/667m^2 of potassium, and the factors of affecting yield are N〉K2O〉P2O5〉density, which indicates that the cultivation technique for high-yielding of Biyu 4 should be including heavy applying N fertilizer, reasonably applying K and P fertilizer and keeping the rational plant density.