Metabolizable energy levels for semi-heavy laying hens at the second production cycle

Revista Brasileira de Zootecnia

Fernando Guilherme Perazzo Costa²  Janaine Sena Da Costa¹  Cláudia De Castro Goulart¹  Denise Fontana Figueiredo-lima¹  Raul Da Cunha Lima Neto¹  Bárbara Josefina De Sousa Quirino¹ 

[1] ,UFPB CCA Departamento de ZootecniaAreia PB

关键词: egg quality;    performance;    posture;    desempenho;    postura;    qualidade do ovo;   

DOI  :  10.1590/S1516-35982009000500011

来源: SciELO

【 摘 要 】

This study was carried out to evaluate the energy levels in the diet to obtain better performance rates and quality of eggs from laying hens in the second production cycle. One hundred and eighty Bovans Goldline laying hens with 62 weeks of age were used during four 28-day periods. A completely randomized experimental design was used with four metabolizable energy levels (2,650, 2,725, 2,800, 2,875 and 2,950 kcal/kg), each with six replicates of six birds. The energy level of diet did not affect the weight of the egg, yolk, albumen and eggshell, the percentages of yolk, albumen and eggshell, yolk color and egg specific gravity. Feed intake, egg production, egg mass and feed conversion per egg mass and per dozen eggs increased significantly with increasing levels of metabolizable energy. Feed intake decreased linearly as the energy level in the diet increased. The metabolizable energy levels showed a quadratic effect on egg production, egg mass and feed conversion per egg mass and per dozen eggs. The metabolizable energy level of 2,830 kcal/kg was the most appropriate to promote better performance and quality of eggs from laying hens in the second production cycle.

【 授权许可】

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