Effect of the dietary supplementation with extracts of chestnut wood and grape pomace on performance and jejunum response in female and male broiler chickens at different ages

Table 3 Slaughter results, carcass traits (LS means) and myopathy rates in chickens slaughtered at 45 days of age

Items	Diet (D)			Sex (S)		P value			MSE
Items	C	CN	GP	Females	Males	D	S	D×S	MSE
Chickens¹, n	258	252	255	383	382
Pens, n	12	12	12	18	18
Cold carcasses², g	2352^a	2342^a	2392^b	2122	2602	0.03	<0.001	<0.01	173.06
Dressing out percentage, %	76.6	76.8	76.8	76.4	77.1	0.45	<0.001	0.51	1.48
Chickens, n	48	48	48	72	72
Cold carcasses³ (CC), g	2274	2243	2306	2063	2486	0.32	<0.001	0.10	143.58
Dressing percentage, %	73.3	73.0	73.0	73.3	73.0	0.48	0.18	0.92	1.32
Breast yield⁴, % CC	39.3	38.8	39.5	40.0	38.3	0.16	<0.001	0.56	1.76
P. major, % CC	12.2	12.1	13.4	12.5	11.9	0.33	<0.001	0.37	0.85
Wings, % CC	9.8	10.0	9.9	9.9	9.9	0.06	0.44	0.65	0.51
Legs (thighs+drumsticks), % CC	30.1	30.1	29.8	29.6	30.3	0.67	0.04	0.43	2.02
Myopathy rates at P. major
White striping, %	72.9	60.4	79.2	66.7	75.0	0.12	0.26	-	-
Wooden breast, %	41.7	25.0	41.7	16.7	55.6	0.11	<0.001	-	-
Spaghetti meat, %	29.5	25.5	25.0	48.6	4.2	0.83	<0.001	-	-

MSE root mean square error. C, control diet. CN, control diet supplemented with 0.2% chestnut wood extracts. GP, control diet supplemented with 0.2% grape pomace extracts
¹Carcasses with feet. ²Interaction Diet × Sex, Cold carcasses: P < 0.01: 2126 g, 2103 g, 2126 g in females fed C, CN and GP diets, respectively; 2571 g, 2580 g, and 2652 g in males fed CN and GP diets. ³Without feet. ⁴With bone
^a,bValues with different superscript letters significantly differ (P < 0.05)

ISSN: 2049-1891