Planos nutricionais com redução dos níveis de fósforo disponível e cálcio em rações contendo fitase para leitões desmamados

• Ano de defesa: 2014
• Autor(a) principal: Sélos, Aline Nantes
• Orientador(a): Donzele, Juarez Lopes
• Banca de defesa: Rennó, Luciana Navajas , Silva, Francisco Carlos de Oliveira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Zootecnia
• Departamento: Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul
• País: BR
• Palavras-chave em Português: Nutrição animal; Mineral na nutrição animal; Fósforo na nutrição animal; Cálcio na nutrição animal; Suíno
• Palavras-chave em Inglês: Animal nutrition; Mineral in animal nutrition; Phosphorus in animal nutrition; Calcium in animal nutrition; Swine
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/5826

Aiming to evaluate feeding programs (FP) with different levels of calcium (Ca) and available phosphorus (aP) on rations containing phytase for piglets, one hundred sixty- eight barrows and females weighing 8.11 ± 0.61 kg were weaned at 28 days and blocked according to initial body weight. Inside each block, piglets were randomly distributed to one of seven feeding programs with eight replicates and three piglets per experimental unit.The treatments consisted of control FPwithout phytase and six with decreasing levels(%) of aP and calcium (Ca) with the addition ofphytase(2,000 FTU/kg), as follows: FP1: (aP: 0.435-0.385-0.315; Ca: 0.850-0.825-0.768); FP2: (aP: 0.370-0.320-0.250; Ca:0.850-0.825-0.768); FP3: (aP: 0.305-0.255-0.185; Ca: 0.850- 0.825-0.768); FP4: (aP: 0.435-0.385-0.315; Ca:0.690-0.665-0.608); FP5: (aP: 0.370- 0.320-0.250; Ca: 0.690-0.665-0.608); FP6: (aP: 0.305-0.255-0.185; Ca: 0.690-0.665- 0.608). The FP3, FP5 and FP6 resulted in higher average daily gain and feed intake in comparison to control,from 28 to 35 days. Only FP6 resulted in higher average daily gain in comparison to control, from 28 to 49 days. The FP6 resulted in lower verage daily gain when compared to FP1, from 28 to 63 days.The FP1, FP2, FP4 and FP5provided greater bone mineralization when compared to control. The FP1resulted in greater bone mineralization than FP3, FP5 and FP6. The FP3 resulted in less bone mineralization than FP1, FP2 and FP4. Bone Ca was lower on FP5 when compared to FP1. With the exception of the FP3, phosphorus (P) of the bone was higher on all treatments when compared to control, however, the FP3 treatment resulted in less bone P than FP1. The FP4, FP5 and FP6 resulted in lower bone Ca:P ratio when compared to control. The serum Pconcentrations were lower in FP3 and FP6 in comparison to control. Considering only treatments containing exogenousphytase, the FP3 resulted in lower serum P than FP1, FP4, FP5; and FP6 resulted in lower serum P in comparison to FP5 as well. In conclusion, the FP6 results in satisfactory performance of pigs from 28 to 63 days of agealthough providing lower growth rate when compared to FP5.