本文从不同种植密度和施氮量对玉米籽粒产量的影响，建立了二次多项式回归方程。
Second-degree polynomials equation of maize(Zea Mays L. ) grain yield with both planting density and nitrogen fertilization was established by means of regression analysis.
采用数量分析的方法，系统研究了不同种球大小对鳞茎生长的影响，并对主要性状进行了二次多项式回归分析；
Systematically studying the influence on bulb growth caused by different seed size with quantities analysis method and also making quadric polynomial return analysis towards main characters.
多项式回归分析表明，花粉可育率对特效烯浓度和播期的反应是二元二次方程。
Polynomial regression analysis indicated that the reaction of fertile pollen rates to tetcyclacis concentrations and dates showed a quadratic relationship.
多项式回归分析表明，花粉可育率对特效烯浓度和播期的反应是二元二次方程。
Polynomial regression analysis indicated that the reaction of fertile pollen rates to tetcyclacis concentrations and dates showed a quadratic relationship.
应用推荐