Growth performance, nutrient digestibility, intestinal morphology, cecal mucosal cytokines and serum antioxidant responses of broiler chickens to dietary enzymatically treated yeast and coccidia challenge

Table 3 Growth performance and nutrient digestibility of broiler chickens fed ETY supplemented diets, d 1 to 14 post hatching^a

Item	Concentrations of ETY, g/kg			SD^b	P-value
Item	0	1	2	SD^b	L	Q
Growth performance
BW, g
d 1	49.9	49.9	49.9	5.89	–	–
d 7	144.5	145.1	146.1	13.85	0.440	0.902
d 14	367.4	362.1	375.0	34.56	0.377	0.220
d 1 to 7
BW gain, g/bird	94.6	95.2	96.2	8.71	0.439	0.905
Feed intake, g/bird	136.2	133.4	136.4	17.78	0.966	0.382
G:F, g/kg	699.4	718.6	708.7	65.64	0.691	0.472
d 7 to 14
BW gain, g/bird	223.0	217.0	228.9	23.94	0.409	0.155
Feed intake, g/bird	340.2	326.8	328.4	34.93	0.285	0.432
G:F, g/kg	657.7	663.5	699.0	43.01	0.006	0.231
d 1 to 14
BW gain, g/bird	317.5	312.2	325.1	30.72	0.377	0.220
Feed intake, g/bird	476.4	460.2	464.7	47.08	0.331	0.319
G:F, g/kg	668.5	678.0	700.8	36.98	0.017	0.553
Nutrient digestibility
TTR of DM, %	70.3	70.0	70.3	1.43	0.926	0.462
TTR of GE, %	72.9	73.0	73.2	1.66	0.721	0.894
TTR of N, %	57.8	57.1	58.5	2.41	0.388	0.167
AME, kcal/kg DM	2932.1	2934.1	2949.6	66.98	0.462	0.745

ETY Enzymatically treated yeast, L Linear effect of ETY, Q Quadratic effect of ETY, BW Body weight, G:F Gain to feed ratio, TTR Total tract retention, DM Dry matter, GE Gross energy, N Nitrogen, AME Apparent metabolizable energy
^aData are means of 16 replicate cages, 10 birds per cage were used from d 1 to 14 post hatching
^bSD Standard deviation

ISSN: 2049-1891