Suplementação de fontes de vitamina D para matrizes suínas hiperprolíficas na pré-lactação

Abstract

The final stages of gestation and the beginning of lactation are critical periods for modern sows. One way to minimize issues related to high production and consequent calcium mobilization is through vitamin D supplementation. Therefore, the objective of this study was to evaluate the productive effect of “on top” supplementation with different sources of vitamin D in the diets of hyperprolific sows during the final third of gestation. A total of 150 Landrace × Yorkshire sows (217.73 ± 28.7 kg) were used, distributed in a completely randomized design with three treatments and 50 replicates per treatment: T1 – control (no supplementation), T2 – 1,25-dihydroxyvitamin D₃ (active form), and T3 – 25-hydroxyvitamin D₃ (circulating form). From day 90 of gestation, T2 and T3 groups received premixes added “on top” of the feed, following manufacturer-recommended dosages (0.007 kg/sow/day and 0.0002 kg/sow/day, respectively). No significant differences (P>0.05) were observed for reproductive and productive parameters such as number of live-born piglets, stillbirths, birth weight, mortality, sow body condition variation, and piglet and litter weight gain during lactation. However, significant differences were found in litter weight (P=0.03) and in the variation of both litter weight and live piglet weight (P=0.05). It is concluded that supplementation with different forms of vitamin D from day 90 of gestation did not significantly influence the productive performance of hyperprolific sows.