Факультет технологій тваринництва та продовольства

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https://dspace.pdau.edu.ua/handle/123456789/25

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Перегляд Факультет технологій тваринництва та продовольства за Ключові слова "average daily gain"

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  • Ескіз недоступний
    Публікація
    Effect of the probiotic feed additive Natupro on the productive performance and economic efficiency of piglets during the nursery period
    (Ukrainian Journal of Veterinary and Agricultural Sciences, Lviv, 2026) Myronenko, O. I.; Shaferivskyi, B. S.; Мироненко, Олена Іванівна; Шаферівський, Богдан Сергійович
    This study presents the results of a comprehensive evaluation of the effects of the probiotic feed additive Natupro on the growth performance and economic efficiency of nursery piglets. The experiment was conducted under commercial swine production conditions using hybrid piglets obtained from Landrace × Large White sows insem-inated with PIC 337 terminal-line boars of British origin. Experimental groups were formed according to the principle of analogs, taking into account the age and initial body weight of the animals. In addition to the basal diet, piglets in the experimental group received 0.5 % of the probiotic feed additive Natupro. The results demonstrated that probiotic supplementation enhanced piglet growth performance throughout the nursery period. Piglets receiving 0.5 % Natupro exhibited average daily gains that exceeded those of the control group by 3.6–6.6 %, resulting in a 4.2 % increase in total weight gain and a 3.4 % higher final body weight. The improved growth performance was accompanied by a slight increase in survival rate and stabilization of the physiological condition of the animals, particularly during the critical post-weaning period. The increase in productivity was associated with greater feed intake, while feed conversion efficiency improved slightly (approximately 0.6 %), indicating more efficient utilization of dietary nutrients. At the same time, inclusion of the probiotic additive increased total feeding costs by 14.2 %. It raised the feed cost per kilogram of weight gain by 9.6 %, reflecting both higher feed consumption and the additional cost of the probiotic preparation.
  • Ескіз недоступний
    Публікація
    Effects of IGF2 genotypes on growth performance and meat productivity of three-way hybrid pigs
    (Regulatory Mechanisms in Biosystems,, 2026-05-24) Fesenko, O. G.; Shaferivskyi, B. S.; Vashchenko, P. A.; Фесенко, Оксана Григорівна; Шаферівський, Богдан Сергійович; Ващенко, Павло Анатолійович
    The study investigated the association between IGF2 gene polymorphism and productive traits of commercial hybrid pigs obtained by crossing Danish Large White and Landrace sows with Duroc and Pietrain boars. The objective of the research was to evaluate the influence of IGF2 genotypes on fattening, carcass, meat productivity, and economic efficiency traits in modern commercial crossbreeding combinations. Genotyping was performed using PCR-RFLP analysis. Four hybrid combinations were studied: LWxLxD, LxLWxD, LWxLxP, and LxLWxP. Allele and genotype frequencies, Hardy– Weinberg equilibrium parameters, productive performance, carcass characteristics, and economic indicators were analyzed. The results demonstrated moderate heterozygosity (He = 0.42–0.492) and the absence of significant deviations from Hardy–Weinberg equilibrium in all experimental groups, indicating stability of the genetic structure at the IGF2 locus. Animals carrying AA and AB genotypes generally showed higher average daily gain, greater absolute weight gain, and shorter fattening periods compared with BB genotype carriers. Significant differences were observed for average daily gain, age at reaching100 kg body weight, feed consumption, and absolute gain. The influence of the IGF2 polymorphism on carcass and meat traits was also established, particularly for preslaughter weight, transport weight, carcass length measured from the first cervical vertebra, carcass length measured from the first rib, and backfat thickness. In most cases, AA and AB genotypes were associated with better growth intensity and improved carcass quality, whereas BB animals tended to have thicker backfat. Economic evaluation showed that pigs with the AA genotype had the lowest production cost, the highest profitability level, and the greatest net profit per animal. The obtained results confirm the practical significance of the IGF2 locus as a promising marker for marker-assisted selection aimed at improving growth performance, meat productivity, and economic efficiency in commercial pig production systems.