Evaluation of oil, vegetal charcoal and E vitamin on performance and on blood and egg lipid concentrations of laying hens

[摘要] This experiment was carried out to evaluate the effects of two vegetal oils sources, charcoal and vitamin E on performance and lipid levels in blood and eggs of commercial laying hens. It was used Lohman Brown and Lohman LSL laying hens at 58 weeks of age. The experiment lasted 84 days split in three 28-day periods and it was carried out in a complete random design in a split-plot scheme, in a 8 × 2 factorial scheme in the plots with eight diets an two commercial brands, and the periods in the subplots. For evaluation of productive characteristics, total cholesterol, blood tryclecydes and HDL, it was used four repetitions of six birds per experimental unit and, for determination of total yolk cholesterol, two repetitions were used. Diets were added with 2% soybean oil or linseed oil combined or not with E vitamin (60 mg/kg ration) and/or charcoal (2%). No diet effects on the performance variables were observed. Commercial strain effects on feed intake, shell thickness, total cholesterol and blood triglycerides and experimental period effects on egg weight, shells thickness, total cholesterol and blood triglycerides were observed. Use of vegetal oil, charcoal and vitamin E in experimental diets do not affect characteristics of performance neither blood lipid and egg yolk total cholesterol profiles. Lohmann LSL birds show higher feed intake and higher levels of cholesterol and triglycerides in the blood.

[学科分类] 兽医学

[关键词] blood lipids;production characteristics;yolk     IntroduçãoAs sugestões de melhoria da saúde humana pela redução do consumo de gordura animal incluem a preocupação com o consumo de ovo;devido à sua elevada concentração de gordura (Tullet;1987)