Gonzalez-Añover P, Gonzalez-Bulnes A
Department of Toxicology and Pharmacology, Faculty of Veterinary Sciences, UCM, Av. Puerta de Hierro s/n, 28040 Madrid, Spain; Miavit GmbH, Robert-Bosch-Straße 3, 49632 Essen (Oldb.), Germany.
Comparative Physiology Lab, SGIT-INIA, Av. Puerta de Hierro s/n, 28040 Madrid, Spain.
Anim Reprod Sci. 2017 Jun;181:63-68. doi: 10.1016/j.anireprosci.2017.03.016. Epub 2017 Mar 30.
Previous results obtained in gilts maintained under experimental conditions suggest that amino acid supplementation during pregnancy may be a promising strategy for diminishing the incidence of embryo losses and low birth-weight newborn. The current study evaluated the effects of a short-term supplementation with L-proline, around implantational stages, on litter size and birth-weight of piglets in sows of different parities maintained under commercial farm conditions. There were no significant effects in mature sows with three or more parities, but the supplementation improved the reproductive efficiency of the high-prolific first-parity sows and of all the sows at second-parity. There were numerically higher litter size (of around two more live piglets; n.s.) and higher birth-weights (P<0.05) in the supplemented animals. The results of this study indicate that the effects of L-proline supplementation on litter size and birth-weight are strongly modulated by the maternal characteristics; specifically by parity and prolificacy and that supplementation may be cost-efficient for the management of females with compromised energy balance; specifically, sows at second farrowing and highly-prolific primiparous gilts.
先前在实验条件下对后备母猪的研究结果表明，孕期补充氨基酸可能是减少胚胎损失和低出生体重新生儿发生率的一种有前景的策略。本研究评估了在商业农场条件下，在着床期前后短期补充L-脯氨酸对不同胎次母猪产仔数和仔猪出生体重的影响。对于三胎及以上的经产母猪没有显著影响，但这种补充提高了高产的初产母猪和所有二胎母猪的繁殖效率。在补充L-脯氨酸的母猪中，产仔数在数值上更高（大约多产两头活仔猪；无统计学意义），出生体重也更高（P<0.05）。本研究结果表明，L-脯氨酸补充剂对产仔数和出生体重的影响受到母体特征的强烈调节；特别是胎次和产仔数，并且这种补充对于能量平衡受损的母猪管理可能具有成本效益；具体而言，是二胎母猪和高产初产后备母猪。
