Table 5.

Effect of β-mannanase supplementation in diets containing copra meal on jejunal morphology and digesta viscosity in broiler chickens¹⁾

Items	Dietary treatments					SEM	p-value2)
	CON	Supplemental levels of β-mannanase in 10% CM diets
		0%	0.05%	0.10%	0.20%		Total	Linear	Quadratic
VH	1,152	1,196	1,288	1,200	1,219	63.6	0.661	0.935	0.721
VW	130	130	126	134	132	6.0	0.936	0.658	0.889
CD	153	150	174	142	148	16.2	0.710	0.624	0.855
VH:CD	9.0	9.3	9.7	9.8	9.7	0.87	0.962	0.771	0.727
Digesta viscosity, cPs	1.78	1.70	1.74	1.70	1.71	0.044	0.632	0.941	0.791

CON, corn and SBM-based control diets; CM, copra meal; SEM, standard error of means; VH, villus height; VW, villus width; CD, crypt depth.

¹⁾Data are least squares means of 8 observations per treatment.

²⁾Total = overall effects of treatments; Linear and quadratic effects of increasing β-mannanase supplementation in 10% CM diets without the data for CON treatment.