Blend de ácidos orgânicos em dietas para fêmeas suínas em gestação e lactação

Abstract

Nutritional strategies such as the use of acidifiers can contribute to improving the performance of sows during gestation and lactation. The objective of this study was to evaluate the inclusion of an organic acid blend in the diet of mixed-parity sows during gestation and lactation, on the performance, blood parameters, and performance and composition of the intestinal microbiota of suckling piglets. A total of 300 mixed-parity sows were used, and the animals were distributed in a randomized block design, consisting of three treatments with 100 females per treatment, according to body weight on day 50 of gestation and parity order (1st, 2nd: Young; and 3rd-6th: Adult). The treatments consisted of CON (control diet, without inclusion of the acidifier); ACTLow (inclusion of 0.3% of the acidifier, ACTHigh (inclusion of 0.5% of the acidifier), the additive was supplied daily in an “on top” manner following the feeding curve of the sows, the supply started at 50 days of gestation and throughout the lactation period. Dietary supplementation with acidifier did not influence the reproductive performance of the sows and the productive performance of the piglets during lactation (P > 0.05). There was an effect of parity orders on body weight at farrowing and weaning, average daily feed intake and estimated daily milk production of the sows (P < 0.05). There was an effect of parity orders on plasma levels of ALT and NEFA at 80 days of gestation (P < 0.05). Supplementation with 0.5% of the acidifier tended to reduce AST at 80 days of gestation (P < 0.05) and reduced urea at 110 days of gestation. (P<0.05). The acidifier had no effect on the antioxidant enzymes of the sows, IgG, IgA and I-FABP in the serum of the piglets (P>0.05). ACTLow piglets showed a reduction in IL-6 and ACTHigh piglets a reduction in IL-12/IL23p40. Piglets belonging to ACTHigh showed greater microbial richness and diversity. Dietary supplementation with 0.5% organic acids improves protein digestibility, reducing AST at 80 days of gestation and plasma urea at 110 days. In addition, it promotes greater microbial abundance in the offspring and modulates the composition of the microbiota, without impacting the performance of sows and piglets during lactation.