The effect of a supplement of chromium (picolinate) on the level of blood glucose, insulin activity and changes in laboratory evaluation of the ejaculate of breeding boars
2012
Horky, P., Mendelova Univ., Brno (Czech Republic). Ustav Vyzivy Zvirat a Picninarstvi | Jancikova, P., Mendelova Univ., Brno (Czech Republic). Ustav Vyzivy Zvirat a Picninarstvi | Zeman, L., Mendelova Univ., Brno (Czech Republic). Ustav Vyzivy Zvirat a Picninarstvi
Our experiment was based on feeding the organic form of chromium (picolinate) and the assessment of its effect on the level of blood glucose, insulin activity and changes in the laboratory values of the ejaculate (sperm motility, ejaculate volume, sperm concentration and per cent of pathological sperm) in breeding boars. The experiment involved 40 boars divided into two equal groups. Boars of the experimental group (n = 21) received 181.81 microg of Cr per kg of feed ration administered perorally. In the control group (n = 19) Cr intake was not increased. The Cr supplement significantly increased cell absorption of blood glucose in the experimental group. There was no difference in insulin activity between the two groups. Changes in laboratory values of the ejaculate were evaluated and no significant differences were discovered in any of the characteristics. During the experiment the sperm concentration and motility were absolutely the same in boars of both groups; it can therefore be concluded that increasing the level of Cr in the feed ration of boars of the experimental group had no direct effect on these variables. It was the same in the case of the ejaculate volume which gradually decreased between periods 1 and 4, in boars receiving Cr by 12.8 % and in the control group by 8.1 %. The beneficial effect of Cr was seen in the reduced count of pathological sperm in boars in periods 3 and 4. In spite of the considerable (26.3 %) difference between the groups, this decrease was not statistically significant. Data evaluation revealed a significant correlation between the number of samplings per boar and sperm concentration. A significant correlation was also detected between the ejaculate volume and sperm concentration.
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