期刊论文详细信息
Revista Brasileira de Ciência Avícola
Effect of protein, carbohydrate, lipid, and selenium levels on the performance, carcass yield, and blood changes in broilers
Fh Hada2  Rd Malheiros1  Jdt Silva1  Rh Marques2  Ra Gravena2  Vk Silva2  Vmb Moraes2 
[1] ,UNESP Faculdade de Ciências Agrárias e Veterinárias de Jaboticabal IDepartamento de Zootecnia
关键词: Carbohydrates;    lipids;    blood parameters;    protein;    selenium;   
DOI  :  10.1590/S1516-635X2013000400014
来源: SciELO
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【 摘 要 】

The objective of this study was to evaluate the performance, carcass and parts yield, and blood changes in broilers fed different protein, carbohydrate, and lipid levels. Birds were fed a commercial diet until seven days of age. On day 8, birds were distributed according to a completely randomized experimental design in a 4 x 2 factorial arrangement (control diet, low protein diet, low carbohydrate diet or low lipid diet vs. supplementation of 0 or 0.3ppm organic selenium) with four replicates of 15 birds each. Broilers fed low protein presented lower body weight, feed intake, and worse feed conversion ratio on day 42, as well as lower carcass and breast yields, higher leg and abdominal fat yields, higher triglyceride and lower uric acid blood levels. Broilers fed the low carbohydrate diets presented low glucose levels on days 14 and 42.Creatine-kinase (CK) levels increased as birds aged. The livability of broilers fed the low protein diets improved and of those fed low carbohydrate diets worsened with dietary selenium addition on days 35 and 42. Selenium supplementation increased glucose levels in 42-d-old broilers. Changes in dietary protein caused more impact on broiler performance compared with carbohydrates and lipids. Changes in macronutrients caused metabolic changes in broilers. Selenium affected broiler livability as measured on days 35 and 42, and glucose blood levels.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License

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