Effect of dietary selenium on lipid oxidation, selenium and vitamin E content in the meat of broiler chickens

Abstract

An experiment was conducted to compare the effect of dietary sodium selenite and selenomethionine on selenium and α-tocopherol concentration in breast meat, oxidative stability of meat in broilers, and on growth performance, but only as an unimportant criterion in this case. Sexed broiler cockerels Ross 308 were allocated to 3 dietary treatments, each comprising 100 chickens. The basal diet was supplemented with 0 (control) or 0.3 mg/kg Se from sodium selenite (SS) or selenomethionine (SM). Dietary supplementation with SM increased (P < 0.05) body weight, but only by about 3%. Breast muscle Se concentration was increased (P < 0.05) by both Se sources, but more by SM (1.32 mg/kg dry matter; 0.47 mg/kg DM in control). The concentration of Se in excreta was 3 times higher with SS supplement than with SM supplement. Dietary Se supplementation increased (P < 0.05) the α-tocopherol content of breast meat from 25.9 mg/kg DM in the control to 33.2 mg/kg DM when SM supplementation was used. Furthermore, lipid peroxidation decreased compared to the control. The inclusion of SM in the diet reduced (P < 0.05) malondialdehyde (MDA) values in breast samples after 0, 3, and 5 days of cooler storage, whereas SS decreased (P < 0.05) the MDA of breast meat after 0 and 3 days of storage. The results of this experiment indicate that selenomethionine in the diet of broilers is capable of simultaneously increasing the content of selenium and vitamin E in broiler meat plus its stability in storage.

Effects of selenomethionine and sodium selenite supplementation on meat quality, selenium distribution and antioxidant status in broilers

“…GSH) were increased, while the metabolic product of lipid peroxides of MDA content was decreased. The outcome was in agreement with the results of Skřivan et al (2008Skřivan et al ( , 2010. These findings suggested that Se improved the antioxidant property of broilers by elevating activities of antioxidant enzymes and concentrations of antioxidant and reducing peroxidation products, and also implicated that Se-Met supplementation may have a more beneficial effect on oxidative stability than SS.…”

“…results are presented as means ± SD, n = 3 SS = sodium selenite; Se-Met = selenomethionine; Hunter a value = redness a,b,c means within rows with different superscript letters differ significantly (P < 0.05) tion, which was in good agreement with findings of Moksnes and Norheim (1986) and Skřivan et al (2008Skřivan et al ( , 2010. It is known that organic Se has a higher bioavailability than inorganic Se for the Se deposition in the tissues (Mahan and Parrett, 1996).…”

The effect of dietary selenium sources and levels on performance, selenium content in muscle and glutathione peroxidase activity in broiler chickens

“…Accordingly, Dlouhá et al (2008) or Skřivan et al (2008a) confirmed that organic sources of selenium increased its content in breast meat. The organic form of selenium is deposited to a greater extent than the inorganic form.…”

“…Skřivan et al (2008a) found out the positive effect of organic and inorganic selenium form on an increase in body weight and Ševčíková et al (2006) or Dlouhá et al (2008) also reported the positive effect of organic selenium source. But other authors (Choct et al, 2004;Yoon et al, 2007) did not observe any significant differences in the final body weight of chickens after addition of selenium in organic form.…”

“…The addition of selenium from selenomethionine to feed mixture increased body weight in chickens (Skřivan et al, 2008a). Dlouhá et al (2008) also recorded higher body weight after selenium supplementation in organic form.…”