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Vliv selenu, zinku, vitamínu C a E na potlačení tepelného stresu u kanců
Půlpánová, Barbora
The aim of the study was influence of the complex of two elements (zinc, selenium) and two vitamins (vit C, vit E) on the organism of pigs under heat stress. Twenty boars of the Duroc breed were included in the experiment. The boars were approximately the same age and weight, housed individually. They were divided into 2 groups. The control group (n = 6) was fed only to a basic feed mixture containing 0.02 mg Se; 21.5 mg Zn; 9.9 mg of vitamin E and 16.0 mg of vitamin C. In addition, 0.5 mg of selenomethionine, 70 mg of alpha-tocopherol, 70 mg of zinc oxide and 350 mg of ascorbic acid were added to the diet (n = 6). The experiment took place from June to September at the insemination station in Velké Meziříčí. The control group showed a slight increase in ejaculate volume (by 19 %), which is common in the summer months. At the same time, the sperm concentration was unstable, it increased by 15 % in August, but fell below the baseline by 3.5 % in September. Motility was around 69 % during the experiment. Statistically significant was an increase (by 15 %) of morphologically abnormal sperm in the ejaculate (P < 0.05). The experimental group had higher ejaculate from the beginning. However, the volume curve was almost identical to the experimental group. The sperm concentration increased by 23 % in the trial group after adding antioxidants. During the experiment the concentration only slightly decreased. Motility in the experimental group averaged 70 % and did not change significantly during the experiment. Even in the control group there was a statistically significant increase in morphologically abnormal sperm (by 12.3 %), (P <0.05). From the results it can be concluded that the increased amount of selected antioxidants did not have a demonstrable effect on the improvement of the ejaculate quality, but it can be assumed that this quantity has ensured the stability of the seed parameters.
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Vliv chrómu na kvalitu ejakulátu a metabolismus sacharidů u plemenných kanců
Hánlová, Petra
Hánlová, P: Effect of chromium on semen quality and carbohydrate metabolism in bre-eding boars, Diploma Thesis MENDELU, Brno, 2015, s. 59 The aim of this thesis was to develop a literature search and experimentally de-termine the influence of mineral nutrition on boar semen quality. The thesis is divided into two parts. The first assesses the impact of the addition of chromium on semen qua-lity of breeding boars. The second part examines the influence of the addition of chro-mium on glucose and insulin levels in the blood of breeding boars. The experiment was conducted in Velké Meziříčí at the insemination center boars. The experiment consisted of 28 Duroc boars breed for 14 weeks. These boars were divided into 4 groups according to age balanced. In the control (n = 7) group (K), was chromium receiving 205 ug/kg/day. In the 1st group (n = 7) animals (CR1) was dose chromium even increased by 60.6 ug/kg compound feed for the second group (n = 7) boars (Cr2) of 121.2 ug/kg and 3. group (n = 7) boars (Cr3) was added chromi-um in an amount of 181.8 ug/kg compound feed. The addition of chromium to the semen quality of breeding boars too had a signifi-cant impact. During the first months of feeding chromium occurred in the control group to a decrease in ejaculate volume of 29 ml. In the group S3 during the experiment is bound to increase sperm concentration, but in the fourth taking under review decreased significantly compared to previous months. The difference between the third and fourth taking was 131.5 thousand/mm3. This difference is statistically insignificant, and could be caused by external influences or errors in nutrition. Sperm motility during certain months was below 70%. This ejaculate should not be used for insemination. In the second part of the experiment, the addition of the chromium significantly reduced glukose levels and insulin activity. The obtained results can not recommend feeding chromium breeding boars.
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Vliv antioxidantů (selen, vitamin C a E) na biochemické ukazatele ejakulátu kanců
Vaněk, Dušan
The aim of this thesis was to create a research of scientific literature and then experimentally determine the influence of selenium, vitamin C and E on biochemical indicators of boars ejaculate (antioxidant capacity, selenium concentrations, enzyme activity). Ten boars of the Duroc breed were used and they were divided into 2 groups. All animals were feeding 3.3 kg basic feed mixture that contained 0.02 mg of selenium, 9.9 mg of vitamin E and 16 mg of vitamin C per kilogram of compound feed. The experimental group of boars was added of 0.5 mg selenium (selenomethionine); 70 mg of vitamin E (alpha-tocopherol) and 350 mg of vitamin C (ascorbic acid) per kilogram of diet. Biochemical parameters were positively influenced by an addition of organic selenium, vitamin C and E. Antioxidant capacity of the organism, the level of GSH-Px and superoxide dismutase increased. Level of metalothionenin and selenium were relatively unchanged. The results of the methods used in our experiment showed, that supplementation of feed affects antioxidant mechanisms of the animals.
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