Intake and performance of confined crossbred heifers fed different lipid sources

Revista Brasileira de Zootecnia

Giovani Fiorentini¹  Márcia Cristina Araújo Santana¹  Alexandre Amstalden Moraes Sampaio¹  Ricardo Andrade Reis¹  Andressa Ferreira Ribeiro¹  Telma Teresinha Berchielli¹ 

[1] ,Universidade Estadual de São Paulo Departamento de Zootecnia São Paulo,Brasil

关键词: carcass;    females;    ingestion;    protected fat;    soy oil and soybean;   

DOI  :  10.1590/S1516-35982012000600025

来源: SciELO

【 摘 要 】

The objective of this study was to evaluate the effect of different lipid sources on nutrient intake, performance, development and carcass characteristics of heifers raised in confinement. Twenty-one crossbreed heifers (Nellore × Santa Gertrudis × Braunvieh) received 600 g/kg forage composed of corn silage and 400 g/kg concentrate with a 58.0 g/kg fat content in the total diet. The following lipid sources were used: soybeans, protected fat (Megalac-E®) and soybean oil. The experimental design was completely randomized, with three treatments and seven replicates, and the means were compared by the Tukey test at 5%. The protected fat diet resulted in a greater intake of dry matter (8.80 kg/d) when compared with the other diets. The animals that were fed the protected fat diet had a higher average daily weight gain and slaughter weight. Feed conversion and protein efficiency rate were not influenced by lipid sources. Carcass yield was not influenced by the different diets.

【 授权许可】

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