Table 4.

pH, and color of the pectoralis major at 34 d of age in broilers fed diets containing varying amounts of cinnamon bark powder (CBP) were measured 24 h postmortem.

				Cinnamon (g/kg)			Probability
Treatment 1	NC	PC	Salinomycin	2	4	6
Ultimate pH	5.78 ± 0.02 2	5.79 ± 0.02	5.76 ± 0.02	5.83 ± 0.04	5.77 ± 0.02	5.71 ± 0.03	0.090
pH decline	0.31 ± 0.08	0.37 ± 0.08	0.46 ± 0.03	0.42 ± 0.07	0.39 ± 0.05	0.65 ± 0.06	0.067
L2	49.91 ± 0.26 a	44.29 ± 1.01 bc	43.18 ± 0.77 c	45.46 ± 0.32 bc	46.26 ± 0.88 bc	47.47 ± 1.31 ab	0.0001
a2	7.25 ± 0.89	7.94 ± 0.53	7.55 ± 0.87	7.61 ± 0.53	8.03 ± 0.16	8.54 ± 1.14	0.873
b2	10.48 ± 0.70 bc	10.79 ± 0.85 bc	9.95 ± 0.51 c	13.22 ± 0.80 a	11.97 ± 0.63 abc	12.17 ± 0.48 ab	0.021
∆E	45.48 ± 0.30 c	51.09 ± 1.10 ab	52.01 ± 0.85 a	50.28 ± 0.36 ab	49.33 ± 0.90 ab	48.38 ± 1.11 bc	0.004
Hue angle (◦)	55.68 ± 2.73	53.49 ± 0.73	53.44 ± 2.36	60.12 ± 0.92	55.94 ± 1.00	55.4 ± 4.34	0.589
Saturation index	12.81 ± 0.95	13.4 ± 0.99	12.54 ± 0.87	15.26 ± 0.93	14.42 ± 0.61	15.09 ± 0.41	0.205
Browning index	33.82 ± 2.60	41.13 ± 3.96	38.71 ± 3.16	46.25 ± 3.13	42.44 ± 2.52	42.52 ± 1.10	0.223
Whiteness index	48.25 ± 0.29 a	42.66 ± 1.12 b	41.79 ± 0.84 b	43.33 ± 0.38 b	44.34 ± 0.92 b	45.31 ± 1.17 ab	0.004

Ultimate pH and color values of the breast muscle were measured. ¹ Treatments: NC—negative control, un challenged, not supplemented; PC—positive control, challenged, not supplemented; Salinomycin—challenged, basic diet supplemented with salinomycin; Cinnamon—groups whose basal diet supplemented with 2, 4, and 6 g CBP/kg diet, respectively, challenged. ² Each mean is calculated using data from 5 birds per group with standard errors. ^abc Means differ significantly in the same rows with different superscripts at p < 0.05; abbreviations: L2, a2, and b2, final lightness; redness; and yellowness, respectively; ∆E—total color change.