Table 3.

Effects of nano-composite of copper and carbon supplementation on Cu residues in yellow-feathered broilers¹

Items	Groups2				SEM	P-value
	CON	N50	N100	N200		Diet	Linear	Quadratic
Liver, mg/kg DM	9.47	9.33	8.47	7.73	0.297	0.138	0.020	0.062
Serum, mg/L	0.14b	0.52b	0.31b	5.10a	0.553	<0.001	<0.001	<0.001
Feces, mg/kg DM	156.33b	273.47b	261.01b	451.58a	29.43	<0.001	<0.001	<0.001

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.

^a-

^bMeans in the same row without the same superscript differ significantly (P < 0.05).