The influence of the organic and inorganic form of zinc on volume ejaculate, sperm - concentration and percentage of pathologic sperms
2011
Horky, P., Mendelova Univ., Brno (Czech Republic) | Jancikova, P., Mendelova Univ., Brno (Czech Republic) | Zeman, L., Mendelova Univ., Brno (Czech Republic)
Sixty-six breeding boars were divided into two equal groups and supplemented Zn in inorganic (ZnO) or organic (Zn fixed to methionine) form in order to evaluate the influence of Zn on reproductive indicators (ejaculate volume, concentration of spermatozoa and percentage of pathologic sperm cells). In 115 days of experiment duration, the volume of ejaculate significantly increased in both groups (from 207.5+/-66.56 mL to 289.5+/-81.28 mL in boars supplemented organic Zn, from 229.62+/-102.64 mL to 289.14+/-122.48 mL in boars supplemented ZnO). The concentration of sperms in the group receiving the organically fixed Zn slightly decreased from 407.44+/-126 thous./cubic mm to 400.67+/-200.86 thous./cubic mm. By contrast, the group of boars whose feeding mixture contained the inorganic form of Zn reached in the last two weeks of the experiment an increased concentration of sperms (from 402.63+/-180.26 thous./cubic mm to 424.10+/-149.81 thous./cubic mm). The percentage of pathologic sperms did not show any demonstrable difference between the two groups. Both groups exhibited only a mild increase in this indicator (from 10.18+/-8.46 % to 11.67+/-7.68 % in boars supplemented organic Zn and from 9.4+/-8.4 % to 9.92+/-6.68 % in boars supplemented ZnO). The obtained ejaculate served to produce more insemination doses (on average by 20.97 in boars receiving organic Zn and by 20.2 in boars receiving ZnO). In conclusion, feeding the organic Zn form had a beneficial influence on the volume of ejaculate and hence on the production of insemination doses.
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