Culture Condition Improvement for Phytase Production in Solid State Fermentation by Aspergillus ficuum Using Statistical Method

Table 5

Results of regression analysis for Plackett-Burman design.

Term	Coefficient	t value	P value
Intercept	5.17	33.89	<0.0001
Moisture	1.17	7.67	<0.0001
Temperature	−0.14	−0.90	0.3852
Particle size	−0.95	−6.20	<0.0001
Fermentation time	3.35	21.98	<0.0001
MgSO4	2.25	14.72	<0.0001
KH2PO4	−1.22	−8.0	<0.0001
(NH4)2SO4	0.15	1.01	0.3323
Glucose	1.11	7.29	<0.0001
Tween-80	−1.20	−7.89	<0.0001
NaCl	−0.20	−1.28	0.2236
Inoculum size	−0.26	−1.72	0.1110

𝑅² = 0.96.