Superior growth performance in broiler chicks fed chelated compared to inorganic zinc in presence of elevated dietary copper

Table 4 Effects of organic Zn sources and high dietary CuSO₄ on growth performance in broilers (Experiment 3)¹

CuSO₄, mg/kg	Zn source, 30 mg/kg	D8 BW, g/bird	D19 BW, g/bird	Gain, g/bird	Feed Intake, g/bird	Feed:gain	Mortality, %
8	Zn(HMTBa)₂	83	375	336	457	1.362	1.67
250	Zn(HMTBa)₂	82	367	328	438	1.336	0.83
8	Zn-MET	81	374	335	457	1.364	1.67
250	Zn-MET	80	356	317	447	1.408	2.50
SEM		1	4	4	12	0.030	1.39
Main effect means
Cu level
	8	82	375^a	335^a	457	1.363	1.77
	250	82	361^b	332^b	442	1.372	1.77
Zn source
	Zn(HMTBa)₂	82	371	332	447	1.349	1.25
	Zn-MET	81	365	326	452	1.385	2.18
2 × 2 factorial arrangement, P value
Zn source		--	0.187	0.198	0.703	0.217	0.553
Cu level		--	0.004	0.005	0.227	0.759	1.000
Zn Source* Cu level		--	0.292	0.271	0.696	0.245	0.554

¹A total of 288 ROSS 308 male birds were used, with six cages per treatment, and 12 birds per pen
^a,bMeans within a column with no common superscripts differ (P < 0.05)

ISSN: 2049-1891