The Proceedings of XXV World's Poultry Congress pages:63-63
World's Poultry Congress edition:25 location:Beijing, China date:5-9 September 2016
The aim of this study was to investigate the relation between the selenomethionine (SeMet) content in two different selenized yeast products and L-selenomethionine
on selenium deposition in broiler muscle tissue. Two different commercially available selenized yeast products were analyzed for SeMet content with HPLC-ICP-MS, after twofold enzymatic extraction (protease/lipase at pH 7.5) in a water bath (37° C). Selenium in the form of SeMet was
26% in SeYeast product A and 69% in SeYeast B.
Male broilers were fed one of 4 treatment starter diets. All treatments had 4 pens with 5 animals per pen. Treatment 1 was supplemented with 0.2 mg/kg total Se from sodium selenite. Treatment 2 and 3 were supplemented with 0.2 mg/kg total Se from Se-Yeast products A or B, which resulted in a supplemented Se in the form of SeMet of 0.052mg/kg and 0.138 mg/kg for SeYeast A and B, respectively. Treatment 4 was supplemented with L-selenomethione (Excential Selenium4000) at a dosing of 0.2 mg/kg total selenium, which equals 0.2 mg/kg Se in the
form of SeMet. Representative samples of the left breast of 3 broilers per pen were taken on d14 and analyzed for Se content by ICP-MS. Results show Se content in broiler muscle for treatment 1 (sodium selenite) of 133 μg/kg Se. SeYeast A and Se-Yeast B showed 161 and 267 μg/kg Se, respectively. Treatment 4 (L- selenomethionine) showed the
highest Se content in muscle with 337 μg/kg Se. The data show that the Se deposition in muscle is linearly correlated with the added Se as selenomethionine.
Linear regression of the data shows a fit with a R2 of 0.7186. This study shows that selenium deposition in broiler muscle tissue is related to the added selenomethionine in the diet (P < 0.0001). SeYeast with high SeMet content results in higher Se deposition compared to SeYeast with low SeMet content (P < 0.0001). L- Selenomethionine supplementation results in the highest Se deposition.