Níveis e sequências de níveis de plasma sanguíneo em dietas para leitões desmamados aos 21 dias de idade

• Ano de defesa: 2011
• Autor(a) principal: Caríssimo, Ana Paula Gomes
• Orientador(a): Ferreira, Aloízio Soares
• Banca de defesa: Teixeira, Alexandre de Oliveira , Ferreira, Vanusa Patrícia de Araújo
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Doutorado em Zootecnia
• Departamento: Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul
• País: BR
• Palavras-chave em Português: Desmame precoce; Antibiótico; Plasma sanguíneo
• Palavras-chave em Inglês: Early weaning; Antibiotics; Blood plasma
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/1780

In order to determine sequences of levels of blood plasma in diets with or without added antibiotics for piglets weaned at 21 days old, two experiments were conducted which were used in total, 288 piglets. The experimental design was randomized blocks with six treatments and six replications, with four animals per experimental unit. In the first period after weaning from 22 to 28 days, the blood plasma levels used were 0.0%, 3.0% and 6.0% and the same levels were used in the second period (from 28 to 35 days) however, combined to form sequences of blood plasma from 0.0 to 0.0%, 3.0 to 0.0%, 3.0 to 3.0%, 6.0% -0.0; 6 , 0 to 3.0% and 6.0 to 6.0%. 35 to 42 days of age, piglets in all treatments received the same diet, free from blood plasma. In experiment 1, during the period from 22 to 28 days there was a linear effect (P <0.05) levels in blood plasma include diet on average daily feed intake, average daily weight gain and feed conversion for animals fed diets containing 6.0% levels of blood plasma. There was no linear effect (P> 0.05) in the sequences of inclusion levels of blood plasma in the diet on average daily feed intake, average daily weight gain and feed conversion for the period from 22 to 28 days and the period from 22 to 49. There was no significant linear effect (P> 0.05) of sequences including blood plasma on the height of intestinal villi (AV) and the colony-forming unit (CFU, g / ml) of calves weaned at 21 days old . However, it was observed a linear effect (P> 0.05) the sequence of addition of plasma in the depth of the crypts of the duodenum. No effect (P <0.05) of sequences including blood plasma on the colony forming unit (CFU, g / ml). The inclusion level of blood plasma in diets for piglets weaned at 21 days of age is 6.0% for the period from 22 to 28 days old animals and the sequence of blood plasma levels for the periods from 22 to 35 consecutive days of age is 6.0% and 3.0% in diets with antibiotics, was no synergistic effect of plasma antibiotic. In experiment two, where diets were free of antibiotic, for the period from 22 to 28 days, was no effect (P <0.05) levels in blood plasma include diet on average daily feed intake, gain average daily weight and feed conversion as the blood plasma was added in dieta.Não effect was observed (P> 0.05) of sequences of levels of blood plasma on the average daily feed intake, weight gain and average daily feed for the period from 22 to 35 days and for the period of 49 days the 22nd. There was no effect (P> 0.05) on villus height and crypt depth. The recommended level of inclusion of blood plasma powder without antibiotic in the diet of piglets weaned at 21 days of age is 6% for the period of 21 to 28 days old animals and 3% for the period from 29 to 35 day-old animals.