RESEARCHES REGARDING THE EFFECT OF HETEROSPERMIC INSEMINATIONS ON THE SOME REPRODUCTION INDICES

Abstract

With seminal material derived from 3 boars, during 22 weeks starting introduction on reproduction, there have been homeospermic inseminated Camborough sows and gilts, which fore it has considered the fecundity and prolification. Same thing was with 3 other boars before 18 months age. The boars used on homeospermic insemination constituted the control lot (LM). After these periods, on harvest there was simultaneous planned a young boar and an old boar-experimental lot (LE). After sperm evaluation it was realized the ejaculations mixing up, the dilution, the distribution in doses and the insemination. The using of the heterospermic insemination has the effect the improvement of the fecundity, in media, with 4.8 %. The value of difference between the fecundity of sows heterospermic inseminated (lot LE) and these homeospermic inseminated (lot LM) varied in function by the boars that forming the prelevation group respectively between 2.4 % and 8.5 %. The prolification of sows from lot LE was insignificant more higher comparatively with the values of sows from lot LM, the difference between the media values was only by 0.69 %. The level of the prolification hasn’t a constant evolution, so exist situations where this was higher at the sows from lot LM.