Perfil bioquímico sanguíneo e ganho de peso corporal de suínos em crescimento alimentados com dietas contendo diferentes concentrações de fosfato bicálcico mantidos em estresse por calor

• Autor(a) principal: Dantas, Waleska de Melo Ferreira
• Data de Publicação: 2014
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/1479
• topic: Suíno - Alimentação e rações; Perfil metabólico; Estresse calórico; Fósforo; Pig - Food and feed; Metabolic profile; Heat stress; Match; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA::PATOLOGIA ANIMAL::PATOLOGIA CLINICA ANIMAL

The aim of this study was to establish a blood biochemical profile, comparing the initial (15 kg) and growth I (30 kg) phase and evaluate the effect of diets, with different levels of phosphorus on the metabolic profile and body weight of piglets, maintained in a thermoneutral (22 to 24°C) and hot (32 to 34°C) environments. We used 240 piglets from a commercial line, castrated males with mean body weight of 15 kg and 30 kg, distributed in a randomized block with five treatments and 12 replications each, kept in two environments: thermoneutral and hot, distributed 120 animals in each age group. The treatments were constituted of diets with 0.107 (diet 1 - basal), 0.214 (diet 2), 0.321 (diet 3), 0.428 (diet 4) and 0.535% (diet 5) of available phosphorus for piglets in initial phase (15 kg ) and diets with 0.116% (diet 1 - basal), 0.211% (diet 2), 0.306% (diet 3), 0.401% (diet 4), 0.496% (diet 5) of available phosphorus for piglets on growth stage I (30 kg). At the start and the end of experimental phases body weight was determined and blood samples were collected for the measurement of electrolytes (sodium, potassium, chloride, calcium, phosphorus and magnesium), albumin, total protein, nitrogenated metabolites (urea and creatinine), total and bone alkaline phosphatase, free T4, TSH, glucose and lactate. It is concluded reference values must be considered for each phase of growth in pigs, because the influence of the age factor in the biochemical profile. The increase in the concentrations of available phosphorus in the diet promotes greater body weight gain in both the thermoneutral (24°C) and in hot (34°C) environment, only in the initial growth (15 kg) phase. The hot environment promotes changes in homeostasis and body weight gain in both study phases.