Modelling protein utilization in laying hens

Revista Brasileira de Zootecnia

Sakomura, Nilva Kazue¹  Basaglia, Roberta²  Resende, Kleber Tomás de² 

[1] UNESP, Jaboticabal;UNESP

关键词: crude protein requirement;    factorial method;    laying hen;    requirement model   IntroduçãoO conhecimento das exigências protéicas para poedeiras em fase de produção é de fundamental importância;    uma vez que a produção e o tamanho dos ovos são dependentes da ingestão de proteínas;   

DOI  :  10.1590/S1516-35982002000900013

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective of this study was to determine a model for crude protein requirements (CP) for laying hen by the factorial method. The protein maintenance requirement was determine by the nitrogen balance technique . The crude protein requirement for weight gain was determined based on body nitrogen content and nitrogen efficiency for body deposition. The crude protein requirement for egg production was determined based on the nitrogen content of eggs and nitrogen efficiency for egg deposition. Considering the requirements for maintenance, egg production and weight gain, it was elaborated a protein requirement model for laying hen: PB = 1.94xW.75 + 0.480xG + 0,301x E, where PB = requirement (g/bird/day), W = body weight (kg), G = daily weight gain (g/day) and E = egg mass (g/bird/day).

【 授权许可】

CC BY-NC