According to the quadratic general rotary unitized design, the regression models of urea, moisture, time and NDF, ADF, CEL, ADL, CP, DDM48,DNDF48,DADF48 were set up and parameters were optimized.

• 根据二次通用旋转回归模式，建立尿素、水分、时间对NDF、ADF、CEL、ADL、D_(DM48)、D_(NDF48)、D_(ADF48)的回归模型，并对回归模型进行优化分析及参数优化。