Models for predicting protein requirements for meat quail.

Autor: Nogueira MFZF; Animal Science Department, State University of Maringá, Maringá, Paraná, Brazil., Marcato SM; Animal Science Department, State University of Maringá, Maringá, Paraná, Brazil., Furlan AC; Animal Science Department, State University of Maringá, Maringá, Paraná, Brazil., Zancanela V; Animal Science Department, State University of Maringá, Maringá, Paraná, Brazil., Finco EM; Animal Science Department, State University of Maringá, Maringá, Paraná, Brazil., de O Grieser D; Animal Science Department, State University of Maringá, Maringá, Paraná, Brazil., Stanquevis CE; Animal Science Department, State University of Maringá, Maringá, Paraná, Brazil., de Oliveira-Bruxel TM; Animal Science Department, State University of Maringá, Maringá, Paraná, Brazil.
Jazyk: angličtina
Zdroj: Animal science journal = Nihon chikusan Gakkaiho [Anim Sci J] 2019 Jul; Vol. 90 (7), pp. 870-879. Date of Electronic Publication: 2019 May 16.
DOI: 10.1111/asj.13172
Abstrakt: Three experiments were carried out to determine the crude protein requirements for maintenance (CPm) and weight gain (CPg) of meat quail and to develop protein-requirement prediction models. Experiment 1 was conducted to determine CPm by the nitrogen-balance technique. The regression of nitrogen balance on nitrogen intake revealed a CPm requirement of 2.94 g/kg 0.75 /day. Experiment 2 was aimed at determining CPm by the comparative-slaughter technique. Retained nitrogen (RN) and nitrogen intake (NI) were quantified considering the metabolic weight of the birds. The linear regression of RN on NI provided a CPm estimate of 6.63 g/kg 0.75 /day. Experiment 3 was conducted to determine CPg. The regression of body nitrogen from the carcasses on fasted body weight revealed CPg estimates of 407.68 (0-7 days), 501.76 (8-14 days), 470.40 (0-14 days), 517.44 (15-21 days), 627.20 (22-28 days), 423.36 (29-35 days), and 517.44 mg/g (15-35 days). The protein-requirement prediction models developed for meat quail aged 0-7, 8-14, 0-14, 15-21, 22-28, 29-35, and 15-35 days were CP = 2.94.W 0.75  + 0.408.G; CP = 2.94.W 0.75  + 0.502.G; CP = 2.94.W 0.75  + 0.470.G; CP = 2.94.W 0.75  + 0,517.G; CP = 2.94.W 0.75  + 0.627.G; CP = 2.94.W 0.75  + 0.423.G; CP = 2.94.W 0.75  + 0.517.G, respectively, where: W 0.75  =  metabolic weight (kg), and G =  daily weight gain (g).
(© 2019 Japanese Society of Animal Science.)
Databáze: MEDLINE
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