Effect of organic and mineral selenium sources on production performance and selected physiological indicators in swine

Abstract

The study was conducted on sows (hybrids of wbp × pbz breeds) and their offspring (until day 75 of life) kept on a farm. The aim of the experiment was to compare the effects of different sources of selenium (Se) on the production performance of the animals, Se content in their blood, the level of Se in sow’s colostrum, as well as Gpx, haptoglobin and immunoglobulin levels in the serum of sows and their offspring. Experimental feed mixtures for pregnant sows (LP), lactating sows (LK) and piglets (prestarter and starter) in each treatment had an identical basic composition, differing only in the type of selenium forms. Group I received a mineral form of Se in an amount of 0.2 mg/kg; group II received a mixture of a Se amino acid chelate and the mineral form of Se (0.1 mg/kg of each); group III received a Se amino acid chelate (0.2 mg/kg), and group IV received Se-enriched yeasts (0.2 mg/kg). Beneficial effects of the organic forms of Se were evident already in the lactation period. Sows, especially those from group II receiving 0.2 mg/kg of organic Se, had a higher feed intake, which was related to a higher milk production during lactation. As a result, on the weaning day, piglets from this group were significantly heavier than the other piglets. After weaning, as well, the piglets in this group were significantly heavier. These results were confirmed by parameters of blood serum and whey colostrum. Selenium as a chelate was more available than the mineral and enriched yeast forms. For this reason, the animals receiving the chelate were healthier (fewer inflammations were noted). The animals in this group also showed a better feed conversion compared with the others. The Gpx level in sows’ serum varied depending on the treatment. The highest level of this parameter was determined in sows from group III (receiving 0.2 mg/kg of organic Se), and it differed significantly from its value in the control group. The results showed that the Gpx level was related to the Se concentration in blood serum, which was also confirmed by a higher production of selenocysteine (a part of Gpx). Cells of the animals from this group were better protected against free radicals. Administration of 0.1 mg/kg of organic Se positively affects the performance of animals, but the recommended level in feed is 0.2 mg/kg of a selenium-containing amino acid....

Effects of different selenium sources on sow reproductive performance and piglet development: a meta-analysis

“…According to the article screening process developed by Cochrane (Higgins and Green, 2005), 70 duplicate articles were excluded (PubMed = 26, Science Direct = 36, CNKI = 8), 480 articles were excluded based on the title and abstract (Web of Science = 233, PubMed = 2, Science Direct = 158, CNKI = 87), and 19 articles were excluded according to the exclusion criteria: five English and four Chinese articles showed data duplication; in one study (Park et al, 2015) selenium supplementation of 0.6 mg/ kg was used; in one study (Li et al, 2020) were used unhealthy sows; one study (Kim and Mahan, 2001) described a small sample size; the full text of three studies (Rafai and Jakab, 1999;Lampe et al, 2005;Belyaev et al, 2006) could not be obtained; and four studies (Hostetler and Kincaid, 2004;Boryaev et al, 2005;Oikawa-Takada et al, 2005;Falk et al, 2019) did not provide valid data. Finally, 19 research articles (Mahan and Kim, 1996;Mahan, 2000;Mahan and Peters, 2004;Yoon and McMillan, 2006;Zheng, 2006;Jia, 2007;Quesnel et al, 2008;Svoboda et al, 2008Svoboda et al, , 2009Li, 2009;Yue, 2012;Lin et al, 2013;Wang and Yang, 2013;Ma et al, 2014;Szuba-Trznadel et al, 2017;Xu et al, 2017;Falk et al, 2020;Mou et al, 2020a,b) from seven countries that met the inclusion criteria were included in the meta-analysis; the method and results are shown in Figure 1.…”

“…In total, 12, 11 and 10 studies included data on selenium content in colostrum (WMD = 0.063, 95% CI [0.041, 0.085], P < 0.01, I 2 = 89.2%), selenium content in milk (WMD = 0.035, 95% CI [0.019, 0.052], P < 0.01, I 2 = 99.3%) and selenium content in sow serum (WMD = 0.010, 95% CI [0.003, 0.017], P < 0.01, I 2 = 90%), respectively. There were 14 studies that mentioned the effect of Yue, 2012 Yoon and McMillan, 2006Xu, 2017Wang and Yang, 2013Szuba-Trznadel et al, 2017Svoboda et al, 2009Svoboda et al, 2008Quesent et al, 2008Mou et al, 2020bMou et al, 2020aMahan and Kim, 1996Mahan and Peter, 2004Mahan, 2000Ma et al, 2014Lin et al, 2013Li, 2009Jia, 2012Falk et al, 2020 organic and mineral selenium source on selenium content in piglet serum (WMD = 0.033, 95% CI [0.014, 0.052], P < 0.01, I 2 = 99.5%), and eight studies measured the GSH-Px activity in piglet serum (WMD = 0.044, 95% CI [0.004, 0.085], P < 0.05, I 2 = 87.5%). Figure 6 shows a forest plot summarizing the above data.…”