Table 2.

Generalized linear model.

Terms	Generalized linear model
		Coefficients	t value	Pr (>|t|)	Sign
(Intercept)		1499.94	7.08	5×10−10	***
NH4Cl (g L−1)		−77.00	−2.69	9×10−03	**
Glucose (g L−1)		11.40	3.99	1×10−04	***
pH		−183.22	−5.55	4×10−07	***
Temp. (°C)		−28.59	−5.43	6×10−07	***
Inoculum (× 104 CFU mL	−1)	−102.24	−3.77	3×10−04	***
NH4Cl : Glucose		−0.80	−4.07	1×10-04	***
NH4Cl : pH		2.27	0.58	0.57
NH4Cl : Temp.		1.00	2.53	0.01	*
NH4Cl : Inoculum		4.09	2.07	0.04	*
Glucose : pH		−0.71	−1.79	0.08
Glucose : Temp.		−0.15	−3.92	2×10−04	***
Glucose : Inoculum		0.24	1.21	0.23
pH : Temp.		3.76	4.77	8×10−06	***
pH : Inoculum		8.09	2.05	0.04	*
Temp. : Inoculum		0.71	1.81	0.07
Residuals

Generalized linear model was used to test the effects of the five independent variables (NH₄Cl concentration, glucose concentration, initial pH, cultivation temperature and initial inoculum amount) on the response variable (P solubilization) and possible interactions.

Sign, ‘***’ Pr < 0.001; ‘**’< 0.01; ‘*’< 0.05.