采用三因素两水平正交设计，混合模型分析。
The three factors of exercise at two levels orthogonal design and the linear mixed models analysis were used.
试验中采用了三因素三水平正交多项式回归设计，并建立了影响再生效果的数学模型。
In the experiment, normal multinomial regressive experimental design of three factors and three levels was adopted and mathematical models of regeneration effect were set up.
采用三因素五水平二次回归正交旋转组合设计，研究玉米品种、密度、施肥措施对西昌地区玉米产量形成的作用效应，建立回归模型并分析各因子的作用规律。
Quadratic orthogonal regressive rotation design of three factors is applied to study the effect of varieties, density and fertilization to maize yield in Xichang ecological area.
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