Table 5. Effects of dietary Cu concentrations and sources on haematological parameters in broiler chickens

Item		WBC (103/µL)		RBC (106/µL)		Hb (g/dL)		HCT (%)
		14 d	35 d	14 d	35 d	14 d	35 d	14 d	35 d
Cu source × Concentration
INO (ppm)	16	28.09	22.01	1.93	2.21	9.80	6.73	22.00	28.00
	40	26.55	24.41	1.87	2.28	8.90	7.06	21.53	29.04
	80	22.25	25.15	1.89	2.32	9.23	7.28	21.07	29.30
	120	26.80	25.07	1.81	2.22	8.40	7.25	20.67	28.20
HME (ppm)	16	23.66	22.91	1.84	2.44	9.47	7.48	21.33	30.70
	40	26.75	23.50	1.98	2.20	8.70	7.13	22.37	29.03
	80	28.00	24.32	1.95	2.18	8.97	7.44	22.03	27.86
	120	20.75	25.76	1.88	2.29	9.43	7.36	21.83	28.92
Pooled SEM		0.74	0.64	0.02	0.04	0.19	0.12	0.20	0.50
Contrast
INO vs HME		0.387	0.665	0.272	0.626	0.885	0.069	0.144	0.460
Effect of INO
SEM		0.89	1.06	0.07	0.04	0.34	0.15	1.01	0.54
Linear		0.192	0.379	0.309	0.879	0.183	0.261	0.159	0.880
Quadratic		0.670	0.601	0.881	0.346	0.957	0.591	0.960	0.385
Effect of HME level
SEM		0.90	0.80	0.07	0.07	0.33	0.19	0.95	0.81
Linear		0.411	0.217	0.710	0.450	0.947	0.121	0.630	0.396
Quadratic		0.998	0.801	0.947	0.226	0.286	0.145	0.270	0.435

WBC, white blood cell; RBC, red blood cell; Hb, hemoglobin; HCT, hematocrit; INO, copper sulfate; HME, hot melt extrusion copper sulfate.