Suplementação dietética de butirato de sódio para porcas de diferentes ordens de parto durante a lactação

Abstract

Due to the high capacity of body reserve mobilization of modern sows during lactation, this phase can put at risk the body integrity and the future reproductive performance of these animals. In addition, during the lactogenesis, it must be supplied an adequate amount of nutrients to sows, because these will be part of piglets nutrition through the milk. Therefore, additives used in lactating sows diets can be beneficial, stimulating the dairy secretion, increasing the feed intake or improving the immunity of sows. The butyric acid and its salts have attracted great attention due to thei beneficial effects on intestinal health of pigs. However, studies that demonstrate the effects of these additives in lactating sows’ nutrition are scarce. Thus, this present study aimed to evaluate the effects of different levels supplementation of sodium butyrate to mixed-parity sows diets during lactation on the reproductive performance, milk composition, blood parameters and piglet litter’s performance. A total of 192 sows were distributed in completely randomized design in a 4x4 factorial arrangement, considering 4 experimental diets (diet control; diet with 0.1% and 0.2% of coated sodium butyrate, and diet with 0.066% of not coated sodium butyrate) and 4 parity orders (1st, 2nd, 3rd and 4th, 5th to 7th parity order). Body weight, backfat thickness and feed intake of sows were measured. Average daily milk production and losses of protein, lipid and energy of sows body during the lactation were estimated. The piglets were individually weighed 24 hours after farrowing, 48 hours after farrowing (standardization) and at the weaning, to determine the birth and weaning weight and daily weight gain during lactation. Four sows of each treatment were selected to perform blood collections, at 14 days after farrowing, and milk, at 18 days after farrowing. There was interaction between the sodium butyrate supplementation and the different parity orders on content of some fatty acids in milk from sows. There was no interaction in the studied parameters on reproductive and productive performance and blood parameters of sows, and piglets performance at lactation phase. Dietary supplementation of sodium butyrate did not influence (P>0.05) the mixed-parity sows’ performance, as well as the piglets’ performance at lactation phase. There was an effect (P<0.05) of parity orders on the body weight in the farrowing and weaning, on the feed intake and estimated milk production, with the highest values observed for sows from 5th to 7th parity order. Dietary supplementation of coated or not coated sodium butyrate to lactating sows modulates the profile of fatty acids in milk, but it did not affect the performance and the blood parameters of sows and piglets performance.