@article{Shvachka_2021, title={INFLUENCE OF LACTATION DURATION, SEASON, AGE, BREED COMBINATIONS OF SOWS ON REPRODUCTIVE INDICATORS OF THEIR PRODUC-TIVITY}, url={https://www.snaubulletin.com.ua/index.php/ls/article/view/442}, DOI={10.32845/bsnau.lvst.2021.3.15}, abstractNote={<p>In the article, by conducting a four-factor analysis of variance, the strength of the influence of lactation duration, age of sows, their breed combinations at different times of the year, and the interaction of these factors on the change of individual indicators of reproductive productivity of sows. It was found that the duration of the suckling period most significantly affects the nest weight of piglets at weaning – 73,0%, - the average weight of one piglet at weaning – 64,4%, - the absolute growth of piglets in the weaning period – 63,0%, the average daily gain in this period – 8,4%, relative gains in the suckling period – 1,2%, the safety of piglets before weaning – 0,7% and the weight of the nest at birth – 1,9% and the number of piglets at weaning – 0,4% and not had an effect on the total number of piglets at birth and the fertility of sows. The season had an impact on the safety of piglets before weaning – 2,1%, their number at weaning and the average daily gain in the suckling period of 1,6%, relative gains in this period – 1,2%, the absolute growth of piglets in the suckling period - 0,6%, the weight of one piglet and the weight of the nest at weaning - respectively 0,5% and 0,4% and did not affect the total number of piglets at birth, fertility and nest weight of piglets at birth. The age of the sow had a prob-able effect on all studied indicators. He had the greatest impact on the number of weaned piglets – 8,3%, their safety before weaning – 6,7%, the average daily gain in the suckling period – 4,5%, the weight of the nest of piglets at birth – 2,3% and the fertility of sows – 2,2%, the absolute growth of piglets in the suckling period 2,0%, the weight of one piglet and the weight of the nest at weaning -1.9%, the total number of piglets at birth – 1,7%, the relative growth of piglets in the suckling period - 1,2%, the weight of the nest of piglets at weaning – 0,6%. Breed combinations of L♀×VB♂ and VB♀×L♂ sows did not have a probable effect on the reproductive performance indicators studied.</p&gt;}, number={3 (46)}, journal={Bulletin of Sumy National Agrarian University. The series: Livestock}, author={Shvachka, Ruslan Petrovich}, year={2021}, month={Oct.}, pages={107-120} }