Influence of L-Carnitine Daily Supplement on Qualitative and Quantitative Ejaculate Indicators in Boars During the Summer Period

The purpose of the project was to determine impact of added L‑carnitine in feed ration on quality of Duroc boar ejaculate during the summer period (June–September). Temperature in the stable achieved up to 29.9 °C. For the experiment was chosen 24 Duroc boars. Boars were divided into 2 groups: The control group of boars (n = 12) was fed by the basic feed mixture only. The experimental group of boars (n = 12) was supplemented by 500 mg of L‑carnitine/kg of the feed ration. Ejaculate was collected once a week. Monitored parameters were: volume of ejaculate, concentration of sperm, total sperm count, motility of sperm and percentage of morphologically abnormal sperm. L‑carnitine concentration in the ejaculate was monitored as well. Results of the experiment show that supplementation of 500 g of L‑carnitine into boar ration had a positive impact on sperm motility, significant difference between the boar groups by 8.54 % (P < 0.05) and on decreased morphologically abnormal sperm, significant difference between groups by 12.6 % (P < 0.05), and also significant difference in experimental group during the monitoring by 4.06 % (P < 0.05). After biochemical analysis have been found a statistically significant increase in concentration of L‑carnitine in the ejaculate of the experimental group (up to 21.1 μg/ml) and a statistically significant difference between groups (22.0 μg/ml), (P < 0.05).