Suplementação de betaína, levedura ativa, selênio orgânico e vitamina e para fêmeas suínas

• Ano de defesa: 2021
• Autor(a) principal: Andrade, Tiago Silva
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Aditivos; Composição do leite; Leitões lactentes; Antioxidantes; Estresse oxidativo
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/68021

Three trials were performed to evaluate the dietary supplementation of betaine, live yeast, organic selenium and tocopherol for hyperprolific sows under heat stress on physiological parameters, reproductive performance, milk composition, litter performance and blood concentrations of antioxidant enzymes. In the first trial, the betaine and live yeast supplementation was evaluated. A total of 196 sows (Topigs 20) were alloted in a 4x4 factorial design, with 4 experimental diets (control; supplementation of 7g/sow/day of live yeast; supplementation of 14g of betaine and 7g/sow/day of live yeast) and 4 parity orders (PO) - 1st, 2nd, 3rd-4th, and above the 5th PO. Sows above the 5th PO that fed betaine or live yeast had higher milk yield when compared to sows fed control diet. Betaine supplementation, associated or not with live yeast, for sows above the 5th PO provided a higher litter size at weaning when compared to the control group. The supply of betaine for sows above the 5th PO provided a higher live weight at weaning of their litters when compared to control group. In the second and third trial, the supplementation of organic selenium and tocopherol was evaluated for sows of 1st and 2nd PO (2nd trial) and for sows above the 3rd PO (3rd trial). In both trials, 96 sows (Topigs TN70 - 2nd trial; and Topigs 20 – 3rd trial) were allotted in a 4x2 factorial design, with 4 experimental groups and 2 PO (1st and 2nd PO for 2nd trial, and 3rd-4th and above 5th PO for 3th trial). For both trials, the experimental groups consisted of: ConRA – control diet + evaporative cooling system; ConSRA – control diet + without evaporative cooling system; SeSRA – dietary supplementation of 0.3 mg/kg organic selenium + without evaporative cooling system; SeESRA – supplementation of 0.3mg/kg organic selenium and 90 IU tocopherol + without evaporative cooling system. In the 2nd trial, the sows with evaporative cooling system had higher milk yield and heavier litters when compared to the others. Sows from SeESRA and their litters had higher serum levels of glutathione peroxidase and superoxide dismutase when compared to the other groups. Sows from SeESRA had higher superoxide dismutase content than females from ConRA and ConSRA groups, not differing from SeSRA sows. In 3rd trial, the sows from SeESRA had a shorter weaning-estrus interval than non-supplemented sows. Sows from ConRA had a higher milk yield and weaned heavier piglets with higher average daily weight gain when compared to the other groups. Sows from SeESRA and their litters had higher serum levels of glutathione peroxidase and superoxide dismutase when compared to the other groups. Sows from SeESRA had higher superoxide dismutase content than females from ConRA and ConSRA groups, not differing from SeSRA sows. It is concluded that betaine and/or live yeast supplementation for sows above the 5th OP results in litters with higher daily weight gain at weaning. Under heat stress conditions, the supplementation of organic selenium and tocopherol reduces the weaning-estrus interval and favors an improvement in the antioxidant status of sows and piglets.