The Effect of Glucogenic and Lipogenic Diets on Blood Serum Concentration of Energy Biomarkers in Female Baloochi Lambs

Document Type : Ruminant Nutrition


Ferdowsi university of mashhad


Introduction Recently, dietary balance of glucogenic and lipogenic nutrients is known as an important factor on severity of the NEB and metabolic disorders in transition dairy ruminants. Insulin plays a central role in metabolism by stimulating utilization of glucose in peripheral tissues such as muscle and adipose tissue and by promoting accumulation of glycogen and lipid reserves. In this study the main hypothesis was that plasma insulin concentration would be influenced by dietary quantity and quality of starch and fat. In different studies in dairy cows, insulin was increased by diets with high starch content and was decreased by diets with high fat content, although increased insulin concentrations were found when supplementary fat increased energy intake. Blood concentrations of NEFA, BHBA, Glucose, insulin, cholesterol, AST and the quantity of RQUICKI were assigned to detect the insulin sensitivity in dairy cows. This experiment was aimed to study the dietary fat concentration and starch degradability effects on insulin resistance in ruminants in equal energy diet, using Baluchi sheep.
Materials and methods Twenty and eight female Baluchi lamb with 14.9 ± 2.3 wk of age and 26.3 ± 4.6 kg of BW were assigned to 4 treatments in completely randomized design with 2×2 factorial arrangement and fed 4 rations; 1) without tallow-corn (glucogenic-corn), 2) without tallow-barley (glucogenic-barley), 3) tallow-corn (lipogenic-corn) and 4) tallow-barley (lipogenic-barley), for 9 weeks. Experimental TMR rations were formulated with 60% concentrate and 40% alfalfa according to the AFRC, 1993. Lambs had free access to clean water and feed through individual boxes. Daily feed intake, body weight gain and fasting blood sampling were detected weekly. Blood sampling were sampled by the 6ml tubes (Gel/Clot activator, GD060SGC, Zhejiang Gongdong Medical Technology Co., Ltd), then Serums were reserved in the -800C until blood metabolites detection. Statistical analysis was performed by SAS (9.1) software.
Results and discussion Experimental diets was not affected on average feed intake of lambs, but body weight gain and feed efficiency in week 4 to 8, affected by fat × cereal interaction and they were highest in lipogenic-corn treatment and feed efficiency was correlated with serum glucose concentration (P


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