Dietary levels and sources of selenium for post weaning piglets

Abstract

An experiment was conducted to study the effects of two sources and dietary levels of selenium (Se) on performance, Se concentration and glutathione peroxidase activity in plasma and liver of piglets post weaning. A total of 126 weaned pigs male and female Large White × Landrace, at average body weight of 7.2±0.67kg were allotted to seven treatments in a randomized block design, with two Se sources (organic and inorganic), inclusion levels, two levels for the inorganic source (0.30 and 0.60ppm) and four for the organic source (0.15, 0.30, 0.45 and 0.60ppm) and one control diet without Se supplementation containing 0.095ppm, and six replicates of three animals per pen. The experimental period was 35 days post-weaning. The organic source contained 0.2067% (Se-yeast), and the inorganic 45.86% (sodium selenite) analyzed. Piglets that received supplemental Se had lower feed intake compared to those not supplemented. Furthermore, feed conversion was better with dietary supplementation of Se, and the organic source was better than the inorganic source at level of 0.30ppm. Plasma concentration of Se was higher (35.53%) in animals receiving dietary supplementation of this mineral, regardless of the sources studied. There was no effect of sources on plasma and hepatic Se, with the lowest values observed for the non-supplementation and organic Se at dietary level of 0.15ppm. There was a linear reduction of plasma GSH-Px activity with increased supplementation levels of organic Se, and the hepatic GSH-Px activity increased linearly with the increased supplementation, regardless of the source studied.

Selenium and Natural Zeolite Clinoptilolite Supplementation Increases Antioxidative Status and Immune Response in Growing Pigs

“…A meta-analysis by Bermingham et al (53) found a significant correlation of GSH-Px activity with Se dose and form, which is consistent with the results of Mahan et al (54). In contrast, Oliveira et al (16) reported a linear reduction in plasma GSH-Px activity with increased supplementation levels of organic Se, and a linear increase in hepatic GSH-Px activity with increased supplementation, regardless of the type source in post-weaning piglets. In our research, the higher concentrations of dietary organic selenium and zeolite combination increased (P < 0.05) GSH-Px activity in E3 group (Figure 3) when compared to the other groups.…”

“…In post-weaning piglets, an increase in liver and plasma selenium concentrations subsequent to a supplementation with Se from both organic and inorganic sources. Interestingly, the plasma activity of GSH-Px has been found to decrease with the increase in Se supplementation, but the hepatic activity of GSH-Px increases with increasing Se supplementation, regardless of the type of source (16). According to Rovers (17), Se deposition in muscle tissue is a good indicator of the selenium status of animals.…”

Effect of dietary supplementation with l-carnitine, chromium, and selenium on the performance of finishing pigs

“…In contrast, Jang et al (2010) used three organic sources of selenium (all at 0.3 mg kg -1 feed versus a control diet) for growing and finishing pigs, and Martinez-Gomez et al (2012) provided organic and inorganic selenium (9.45 mg kg -1 feed versus a control diet) and both found positive zootechnical performance results. Oliveira et al (2017), when evaluating supplementation with organic and inorganic selenium at two levels for the inorganic source (0.30 and 0.60 mg kg -1 of feed) and four levels for the organic source (0.15, 0.30, 0.45, and 0.60 mg kg -1 of feed) for 35 days after weaning, found improved feed conversion but no impact on the weight gain of the piglets. In the same study, the authors confirmed the superiority of the organic selenium over the inorganic selenium, and, irrespective of the source, the dose of 0.30 mg kg -1 of feed (the same as in the present study) was the most appropriate for piglets.…”