Abstract
Selenium is an indispensable nutrient for finishing pigs and it plays key roles in several physiological processes. Glycine selenium nanoparticles (G-SeNPs) is a new source of organic selenium. This study was conducted to determine the effects of dietary supplementation of G-SeNPs on the growth performance, loin quality, tissue selenium concentration, and serum antioxidation of finishing pigs. A total of 160 DLY (Duroc × Landrace × Large Yorkshire) crossbred pigs were grouped into 4 dietary treatments, each treatment contains 10 pens (replicates) with 10 pigs per replicate. Pigs were fed a basal diet (control group), and basal diets supplemented with 0.1, 0.3 or 0.5 mg/kg G-SeNPs (treatment groups). The effects of dietary G-SeNPs on average daily gain, average daily feed intake and feed-to-gain ratio were not significant, whereas the linear trends were found in L* and a*. Although drip loss did not differ upon treatment, the pH (24 h) showed a linear trend difference between the treated and untreated animals (P = 0.056). Selenium concentration in tissues increased linearly (P < 0.001) with and was linearly increased (P < 0.001) with the increase in dietary G-SeNPs concentrations. Additionally, the total antioxidant capability, glutathione peroxidase, superoxide dismutase, and catalase activity levels in the serum were linearly increased (P < 0.001) with the increase in dietary G-SeNPs concentrations. Conversely, malondialdehyde concentration in serum, which has an inverse relationship with antioxidation capability, was linearly (P < 0.001) reduced in pigs with dietary supplementation of G-SeNPs compared to pigs fed a basal diet. These results indicate that dietary G-SeNPs can increase the concentrations of selenium in tissues and enhance the serum antioxidant profile, and did not show detrimental effects on growth performance and loin quality in commercial finishing pigs.
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