Resposta individual à ingestão de treonina para suínos em fase de crescimento

Detalhes bibliográficos
Ano de defesa: 2015
Autor(a) principal: Isola, Renan Di Giovanni [UNESP]
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Estadual Paulista (Unesp)
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://hdl.handle.net/11449/126397
http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/11-08-2015/000843095.pdf
Resumo: The methods used to estimate the amino acid requirements for pigs often disregard the variability among individuals in the population. The present study was conducted to evaluate the individual and the group response of threonine intake through a nitrogen balance trial (N). Seven semi-purified diets with seven equidistant threonine levels were offered to eight barrows (21.66 kg ± 0.77 kg) over 21 days, with the change of level held every three days. Threonine concentration ranged from 50% to 120% of requirement, while other amino acid levels was 20% above test requirement, maintaining the ideal profile compared to lysine. The nitrogen retention data for threonine intake were evaluated for each individual and the group, using the linear plateau model and the mixed model. The coefficients of variation of nitrogen retention and threonine intake were 9% and 8%, respectively. In the mixed model with all the random parameters, the variation for threonine intake and N retention were 1.68 ± 0.63 g 0.01 ± 0.03 g, respectively, and there was no change to the slope. The results presented by the mixed model method to evaluate the group's response were very similar responses of estimated plateau linear model in isolation for each individual. The trial allowed studying the variability among individuals, which is extremely important for the development of strategies and more accurate nutritional programs