Published in Scientific Papers. Series D. Animal Science, Vol. LXIV, Issue 2
Written by Alexander DARYIN, Alexander BUSOV, Nikolay KERDYASHOV
Reproduction is the main and most difficult element of the technological process of pork production. The most important signs of reproductive qualities are the live weight of piglets at birth, the safety of piglets, and the multiple pregnancy of sows. The studies were carried out in the conditions of a reproducer of an industrial pig-breeding complex, in which the influence of the duration of the service period and lactation of sows (suckling period) on their large-fruiting, fertility and safety of piglets was studied. The most significant increase in large-fruited was revealed depending on the duration of the service period when only one sow's heat was missed. In the group of sows weaned at 18, 21 and 24 days with a service period of 21-28 days, the large size was 0.054-0.197 kg more than when using sows with a service period of 1-7 days. Multiple pregnancies of the group of sows inseminated in the second heat, with a service period of 21-28 days, and a group of sows with a service period of 45 days or more, increased by 2.34 and 2.39 heads compared to the group of sows without missing heat (P <0.001).
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