Ganho De Peso E Perfil Metabólico Sanguíneo De Cordeiros Alimentados Com Dietas Contendo Gordura Protegida

Abstract

RESUMO: O objetivo do trabalho foi avaliar a influência da gordura protegida sobre o ganho de peso e o perfil metabólico sanguíneo de cordeiros. Utilizou-se 14 cordeiros da raça Santa Inês do desmame até os 174 dias de idade, sendo utilizado o delineamento inteiramente casualizado com sete repetições (animais), dois tratamentos (dieta com e sem gordura protegida) e dois tempos de coleta de dados (início e final). As análises bioquímicas incluíram a determinação da glicose, ureia, triglicerídeos e colesterol. A gordura protegida na proporção de 5% na dieta não promoveu efeito positivo sobre o ganho de peso. A glicose não apresentou variação e os triglicerídeos variaram igualmente nos grupos devido a modificações fisiológicas da espécie. A ureia plasmática foi um bom indicador metabólico dos valores energéticos e o colesterol do aporte lipídico na dieta. A gordura protegida na proporção de 5% na dieta não promoveu efeito positivo sobre o ganho de peso. A inclusão de gordura protegida foi mais eficiente do ponto de vista metabólico comparado ao grupo sem o suplemento. PALAVRAS-CHAVE: bioquímica, desempenho, megalac®, ovino.

Intake, Digestibility, Milk Yield and Indicators of the Metabolic Status of Native Ewes Fed Supplemented Diet Under Grazing System

“…There was no effect (P>0.05) of supplementation on serum glucose. An opposite result was reported by Balaro et al (2012), who described an elevation of levels according to supplementation, and according to Van Soest (1994), who showed a consequent increase in the synthesis of propionate in the rumen, indicating higher consumption and availability of protein coming from the diet.…”

Natural or replacer sources of milk in lambs during feeding adaptation: influences on performance, metabolism of protein and lipid and oxidative/antioxidant status

“…This result may have occurred because of the ether extract obtained from milk replacer. Balaro et al (2012) observed increased serum cholesterol levels in treatment with protected fat supplementation, probably by increased fat levels in the diet. Nunes et al (2010) observed increased cholesterol ratios in lambs as occurred an increase in inclusion of palm kernel cake in the diet.…”

“…Balaro et al. () observed increased serum cholesterol levels in treatment with protected fat supplementation, probably by increased fat levels in the diet. Nunes et al.…”

“…Balaro et al. () supplemented one group of lambs with protected fat and another group without supplementation, observing increased levels of urea in serum in the treatment with the absence of fat. Urea in blood has a positive correlation with the use of amino acids and ruminal ammonia concentration.…”

“…Urea values differed between groups only on day 6, presenting Group B with higher values and Group A without differences; however, these values decreased over the experimental time. Balaro et al (2012) supplemented one group of lambs with protected fat and another group without supplementation, observing increased levels of urea in serum in the treatment with the absence of fat. Urea in blood has a positive correlation with the use of amino acids and ruminal ammonia concentration.…”