Table 5.

Effects of NCCC supplementation on slaughter performance of yellow-feathered broilers¹

Items	Groups2				SEM	P-value
	CON	N50	N100	N200		Diet	Linear	Quadratic
Dressing percentage, %	90.96	91.15	90.35	90.42	0.231	0.556	0.251	0.521
Semi-eviscerated slaughter ratio, %	86.07	86.11	85.44	85.30	0.261	0.605	0.207	0.451
Eviscerated slaughter ratio, %	70.52	71.58	70.29	70.75	0.339	0.596	0.861	0.916
Thigh muscle rate, %	19.81	20.45	19.19	19.98	0.280	0.492	0.930	0.842
Breast muscle rate, %	13.27	13.88	13.89	13.77	0.271	0.840	0.654	0.569

¹ n = 5.

²Group CON: basal diet; Group N50: basal diet added with 50 mg/kg nano-composite of copper and carbon (NCCC); Group N100: basal diet added with 100 mg/kg NCCC; Group N200: basal diet added with 200 mg/kg NCCC.