highly significantP < 0.001
The production models were as follows: (7) P G L U / m L = 26.887 + 0.612 x 1 + 4.534 x 2 − 2.481 x 6 − 0.917 x 1 2 − 3.638 x 2 2 − 2.577 x 6 2 − 1.131 x 1 x 2 − 0.653 x 1 x 6 + 2.791 x 2 x 6 (8) P G U / m L = 33.733 + 1.148 x 1 + 3.963 x 2 − 2.685 x 6 + 0.080 x 1 2 − 2.958 x 2 2 − 2.382 x 6 2 + 0.927 x 1 x 2 + 0.968 x 1 x 6 + 1.714 x 2 x 6 Based on the ANOVA results, the models were highly significant for production of PGL ( F = 29.72, P < 0.001) and PG ( F = 131.23, P < 0.001).