Table 4.

Effect of different dietary levels and sources of selenium on carcass characteristics of broilers at 42 d of age (%).^1,2

Item	Carcass yield	Breast muscle	Thigh muscle	Liver	Gizzard	Heart	Kidney	Pancreas	Spleen	Abdominal fat
Se source
SS	72.50	28.20	17.62	2.13	1.27	0.45	0.93	0.22	0.15	1.48
SM	72.68	28.27	17.67	2.13	1.27	0.45	0.93	0.22	0.15	1.47
SY	72.90	28.35	17.72	2.14	1.27	0.46	0.93	0.23	0.15	1.46
NS	73.15	28.45	17.78	2.15	1.28	0.45	0.95	0.23	0.15	1.47
SEM	1.025	0.891	0.689	0.101	0.012	0.009	0.011	0.051	0.019	0.121
Se level, mg/kg
0.1	72.76	28.29	17.68	2.14	1.27	0.46	0.93	0.22	0.15	1.47
0.3	72.86	28.34	17.71	2.14	1.27	0.45	0.93	0.22	0.15	1.48
SEM	0.987	0.719	0.545	0.098	0.009	0.007	0.010	0.035	0.012	0.109
Source of variation, P-value
Se source	0.342	0.914	0.985	0.001	0.073	0.699	0.098	0.368	0.822	0.081
Se level	0.681	0.873	0.932	0.109	0.298	0.515	0.228	0.606	0.667	0.502
Se source × Se level	0.999	1.000	1.000	0.643	0.232	0.731	0.984	0.846	0.995	0.886
Contrast, P-value
Inorganic vs. Organic3	0.373	0.728	0.852	0.859	0.594	0.276	0.097	0.387	0.517	0.093
NS vs. SY and SM	0.267	0.658	0.817	0.358	0.065	0.943	0.998	0.785	0.463	0.787
NS vs. SS	0.087	0.494	0.718	0.842	0.070	0.254	0.149	0.352	0.745	0.610

SS = sodium selenite; SM = DL-selenomethionine; SY = selenium enriched yeast; NS = nano-selenium.

¹Carcass characteristics data are means of 6 pens with 4 sacrificed broilers per each pen.

²In all considered parameters, skin was removed and bone-in the part and percentages of BW at slaughter.

³Inorganic source of selenium was sodium selenite vs. organic sources of selenium including SM and selenium enriched yeast.