经济林间作甜菜氮磷钾三因素回归最优设计试验

Experiment for N, P, K Three Factor Optimal Regression Design of Sugareet by Intercropped Economic Forest

采用三因素回归最优设计,探索适宜凉州区经济林间作垄作沟灌甜菜氮磷钾最佳施肥量。结果表明:氮磷钾三因素与甜菜产量(y)之间最优回归设计计算得出三元二次多项回归方程为:y=654.10+72.35N+27.49P+88.12K-1.08N^2-0.0043P^2-3.52K^2-0.25NP-0.34NK-1.13PK,其间作甜菜最佳施肥量分别为N 38kg/667m^2、P_2O55 kg/667m^2、K_2O 12 kg/667m^2。

The experiment of three factors optimum regression design was conducted to explore suitable N, P, K fertilizer application amounts for sugarbeet intercropped economic forest under ridge culture and furrow irrigation.Results showed that the regression equation of N, P, K three factors with root yield of sugarbeet（y） was： y =654.10＋72.35N＋27.49P＋88.12K-1.08N^2-0.0043P^2-3.52K^2-0.25NP-0.34NK-1.13 PK, optimum fertilizing amounts of sugarbeet intercropped economic forest by the equation was N 38 kg/667m^2, P_2O55 kg/667m^2, K_2O 12 kg/667m^2.