N?P?K对扬麦12产量及主要经济性状效应研究

摘要 为了探索扬麦12高产栽培条件下N、P2O5、K2O三因子的最佳组合，采用三元二次正交旋转组合设计，研究3因子对扬麦12产量及主要经济性状的效应，建立了33套试验因子与产量及主要经济性状的回归模型。分析得出产量≥400kg/667m2的主要经济性状的指标值及相对应的农艺措施：有效穗24.98～25.72万/667m2、株高84.50～86.67cm、穗长6.57～6.86cm、小穗数15.49～15.68个、穗粒数37.48～38.88粒、千粒重44.45～45.49g，纯N17.29～19.30 kg/667m2、P2O57.58～9.43kg/667m2、K2O 8.53～10.35kg/667m2。最高单产为473.5kg/667m2，对应的农艺措施为：纯氮量18.0kg/667m2、P2O512 kg/667m2、K2O 12kg/667m2。

Preliminary Study on Influence of N.P.K on Main Economic Characteristics and Yield of Yangmai 12

Abstract The purpose of study was to explore the optimum combination of 3 factors of N、P2O5、K2O in the high yield cultivate of Yangmei 12. The effect of three factors on main economic characteristics and yield was studied with the quadratic orthogonal rotation design with three factors. The thirty three polynomial quadratic regression effect model of 3 factors on the yield and main economic characteristics were established.The quantization of yield ≥400kg/667m2 index of main economic and Agriculture measure were obtained through analysis：Number of productive ear are 24.98～25.72 ten thousand /667m2、Plant height 84.50～86.67cm、Ear length 6.57～6.86cm、Spikelets 15.49～15.68、Grains 37.48～38.88、Thousand seed weight 44.45～45.49g，N17.29～19.30 kg/667m2、P2O57.58～9.43kg/667m2、K2O 8.53～10.35kg/667m2.Highest yield is 473.5kg/667m2，Corresponding agrotechnical measures are N18.0kg/667m2、P2O512 kg/667m2、K2O 12kg/667m2.