Selenium source and level on performance, selenium retention and biochemical responses of young broiler chicks

BMC Veterinary Research

Table 2 Effects of dietary selenium levels and sources on blood parameters of 17-d-old broiler chickens

Selenium source¹	Selenium levels, mg/kg					Means	SEM²	P-value
Selenium source¹	0.0	0.08	0.16	0.24	0.32	Means	SEM²	Source	Level	S X L³	L⁴	Q⁵
*Glutathione peroxidase, U/L*
Means	79.1 D	153 C	216 BC	266 AB	319 A		24.3	<0.01	<0.01	0.121	<0.01	0.406
SS	93.8 C	165 BC	240 AB	335 Aa	334 A	233					<0.01^e	0.174
SY	62.8 C	126 BC	194 B	198 Bb	304 A	183					<0.01^e	0.904
*Superoxide dismutase, U/L*
Means	98.7	88.9	92.1	81.9	92.9		7.17	0.524	0.647	0.394	0.647	0.243
SS	98.5	86.4	91.8	88.0	93.4	91.6					0.887	0.187
SY	98.9	91.5	92.5	75.8	92.3	90.2					0.420	0.549
*Total T3, ng/ml*
Means	3.32	2.30	3.01	2.51	2.73		0.125	0.419	0.056	0.134	0.278	0.241
SS	3.99 Aa	2.41 B	3.39 AB	2.59 AB	2.84 AB	2.87					0.136	0.018
SY	2.76 b	2.16	2.75	2.45	2.59	2.68					0.816	0.682
*Free T3, ng/ml*
Means	0.0056	0.0045	0.0059	0.0059	0.0054		0.0002	0.336	0.270	0.089	0.344	0.786
SS	0.0060	0.0042	0.0050 b	0.0060	0.0055	0.0053					0.648	0.163
SY	0.0052 AB	0.0048 B	0.0068 Aa	0.0059 AB	0.0053 AB	0.0056					0.343	0.091
*Free T4, ng/ml*
Means	31.6	36.4	38.8	32.9	35.9		0.942	0.416	0.050	0.403	0.627	0.140
SS	34.0	37.5	42.7	34.5	37.5	35.2					0.604	0.048^e
SY	29.3	36.0	37.2	31.0	34.3	36.6					0.805	0.057^e
*Free T3:Free T4*⁶
Means	1.58	1.35	1.44	1.87	1.72		0.226	0.230	0.078	0.735	0.070	0.125
SS	1.60	1.36	1.28	1.79	1.53	1.51					0.575	0.531
SY	1.56	1.34	1.59	1.95	1.91	1.67					0.037	0.451

¹ SS sodium selenite, SY selenium enriched-yeast
² Standard error of means
³ Interactive effects between selenium and trace minerals sources and selenium levels
⁴ Linear effect of supplementation selenium levels
⁵ Quadratic effect of supplementation selenium levels
⁶ Free T3:Free T4 x 10000
^A-B Different uppercase letters in the same line and lowercase letters in the same column are different by Tukey test at 5%
^e Different superscripts letter indicates difference in the orthogonal contrasts between equations

ISSN: 1746-6148