The influence of season to the sows reproduction

Summarizing the facts mentioned in the literature review it is obvious that science intervenes to the researched problem. The number of articles where the disorders of reproduction are researched is increasing. The reasons can be the big attention from EU to the development of agriculture, the fact that competitiveness makes the farmers to spend quite a lot of money on researches where the problems of reproduction are being explained and the ways to eliminate it are proposed. The researches are done all over the world and separate results are systemized, various hypotheses are being formed. Farm related problems are being solved with the help of architects to plan the farm, as well as the specialists of air ventilation and conditioning, illumination and other fields. But even if we try to avoid problems they occur. Among the highlighted factors influencing the reproduction capacities of sow, factor of seasons is almost the most important element, and the disorders related with it raise a lot of discussions. The light regime virtually doesn’t affect the reproduction capacities under the high temperature, so the heat stays the main reason of summer time infertility. Talking about the influence of seasons to the interval of weaning until the rutting it can be stated that in the optimal combination of air temperature and photoperiod, the reproduction capacities can be stimulated; however each factor separately can inhibit the reproduction. The results of this research shows that it is necessary to change the constructions of outhouse in summer, under high temperature and long light regime, in such way avoiding the detention of the gilts’ maturation time. For a successful reproduction process high requirements are being raised: competent personnel, control of surrounding factors, documentation and protocols, responsibility and accurateness. Reviewing the result of this research it is important to note that the main reproduction rates of the sows in winter time were better than in summer time (prolificacy – 4,36 %, milking capacity– 7,7 %, mass of ablactation nest – 8.57 % bigger)