ANOVA of the effect of K+ and Na+ on fresh weight growth of citrus nonembryogenic cells.

The coefficients for K+ and Na+ under the linear mixture are estimates of the response at each vertex, not estimates of the effects of these two ions. The K+ x Na+ term is not an interaction term, though it looks like one, but a quadratic blending term unique to mixture models. This term is used to determine if the mixture components exhibit nonlinear blending and if that blending is synergistic or antagonistic.线性混合模型下，钾离子（K+）与钠离子（Na+）的系数为各顶点处的响应估计值，而非这两种离子的效应估计值。尽管K+ × Na+项外观上类似交互项，但它并非交互项，而是混料模型所独有的二次混合项。该项可用于判定混合组分是否呈现非线性混合，以及该混合属于协同效应还是拮抗效应。