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

BMC Veterinary Research

Table 3 Effects of dietary selenium levels and sources on selenium balance on 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
*Intake, mg/bird*
Means	0.065 E	0.099 D	0.139 C	0.176 B	0.210 A		0.003	0.794	<0.01	0.794	<0.01	0.882
SS	0.067 E	0.098 D	0.138 C	0.175 B	0.211 A	0.138					<0.01^e	0.435
SY	0.064 E	0.099 D	0.141 C	0.176 B	0.209 A	0.138					<0.01^e	0.321
*Carcass, mg/bird*
Means	0.050 C	0.062 BC	0.073 AB	0.075 AB	0.082 A		0.006	0.118	<0.01	0.717	<0.01	0.221
SS	0.046 B	0.062 AB	0.073 A	0.067 AB	0.078 A	0.065					<0.01^e	0.261
SY	0.054 B	0.062 AB	0.074 AB	0.083 A	0.085 A	0.072					<0.01^e	0.539
*Feathers, mg/bird*
Means	0.0015 C	0.0020 BC	0.0023 AB	0.0025 A	0.0025 A		0.002	0.049	<0.01	0.725	<0.01	<0.01
SS	0.0015 C	0.0018 BC	0.0022 AB	0.0024 AB	0.0025 A	0.0021					<0.01^e	0.331
SY	0.0015 B	0.0021 AB	0.0025 A	0.0027 A	0.0025 A	0.0023					<0.01^e	<0.01
*Total, mg/bird*⁶
Means	0.051 C	0.064 BC	0.077 AB	0.077 AB	0.084 A		0.006	0.136	<0.01	0.698	<0.01	0.168
SS	0.047 B	0.064 AB	0.077 A	0.069 AB	0.081 A	0.068					<0.01^e	0.208
SY	0.055 B	0.064 B	0.077 A	0.085 A	0.088 A	0.074					<0.01^e	0.488
*Retention, mg/bird*⁷
Means	0.024 C	0.037 BC	0.050 AB	0.050 AB	0.057 A		0.006	0.136	<0.01	0.698	<0.01	0.168
SS	0.020 B	0.037 AB	0.050 A	0.042 AB	0.054 A	0.041					<0.01^e	0.208
SY	0.028 B	0.037 AB	0.050 AB	0.058 A	0.061 A	0.047					<0.01^e	0.488
*Balance, %*
Means	34.1	34.0	35.3	25.6	27.4		4.55	0.393	0.393	0.487	0.075	0.421
SS	30.3	37.0	35.8	24.0	25.8	30.6					0.133	0.252
SY	37.9	31.1	34.7	33.2	29.0	33.2					0.301	0.997

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 Sum of the Se content in the feathers and carcass
⁷ Whole body Se in the birds in the beginning of the experiment: 0.0027 mg Se/kg
^A-B Different uppercase letters in the same line are different by Tukey test at 5%
^e Different superscripts letter indicates difference in the orthogonal contrasts between equations

ISSN: 1746-6148