Table 7.

Effects of hulless barley and β-glucanase on the gastrointestinal pH of broiler chickens aged 28 d.

Hulless barley (%)	BGase1 (%)	Crop	Gizzard	Duodenum	Jejunum	Ileum	Ceca	Colon
0	0	5.08	3.33	6.09	5.93	6.73	5.85	6.63
	0.01	5.41	3.58	6.05	5.99	6.98	6.09	6.56
	0.1	5.08	3.51	6.07	6.01	6.87	5.75	6.52
30	0	5.56	3.33	6.06	5.91	7.05	5.99	6.99
	0.01	5.30	3.20	6.09	5.95	6.98	5.83	6.88
	0.1	5.18	3.48	6.18	5.96	7.08	5.77	6.69
60	0	5.29	3.54	6.05	5.99	7.08	6.02	6.92
	0.01	4.87	3.50	6.16	5.97	7.12	5.84	6.98
	0.1	5.23	3.26	6.19	6.01	7.26	6.04	7.17
SEM2		0.059	0.043	0.018	0.014	0.033	0.035	0.048
Main effects
Hulless barley (%)
0		5.19	3.47	6.07	5.98	6.86b	5.90	6.57b
30		5.35	3.34	6.11	5.94	7.03a	5.86	6.85a
60		5.13	3.43	6.13	5.99	7.15a	5.97	7.02a
BGase (%)
0		5.31	3.40	6.07	5.94	6.95	5.95	6.85
0.01		5.19	3.43	6.10	5.97	7.02	5.92	6.80
0.1		5.16	3.42	6.15	5.99	7.07	5.85	6.79
ANOVA P-value
Hulless barley		0.257	0.314	0.339	0.336	0.004	0.453	0.003
BGase		0.527	0.942	0.189	0.273	0.264	0.495	0.875
Hulless barley × BGase		0.114	0.057	0.487	0.838	0.367	0.070	0.361

^a,bMeans within a main effect or interaction not sharing a common superscript are significantly different (P ≤ 0.05).

¹BGase = β-glucanase.

²SEM = pooled SEM (n = 20 birds per treatment).