应用正交多项理论给出了一种施肥量为不等距的一元正交多项式肥料效应函数,它有如下优点:不需解正规方程,因而可避免“病态”出现;所有效应系数之间不存在相关性;计算量比普通的多项式回归模型小. A series of orthonormal polynomial fertilizer effect functions with different amount of fertilizer are given by orthogonal orthogonal theory. It has the following advantages: it can avoid the appearance of “pathological” without solving the normal equation; between all the effect coefficients There is no correlation; the calculation is smaller than the ordinary polynomial regression model.