Energy requirements of Holstein, Gyr, and Holstein × Gyr crossbred heifers using the respirometry technique

Energy requirements of Holstein, Gyr, and Holstein × Gyr crossbred heifers using the respirometry technique

We aimed to determine the energy requirements for maintenance and gain of 18 prepubertal dairy heifers of three breed compositions (BC; Holstein, Gyr, and Holstein × Gyr). Diets were formulated for gains of 0, 400, and 800 g/day, corresponding to 1.0×, 1.5×, and 2.0× maintenance, respectively. Each...

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Bibliographic Details
Main Authors: Taina Silvestre, Alexandre Lima Ferreira, Fernanda Samarini Machado, Mariana Magalhaes Campos, Thierry Ribeiro Tomich, Luiz Gustavo Ribeiro Pereira, Paulo Henrique Mazza Rodrigues, Marcos Inacio Marcondes
Format: Article
Language:English
Published: Frontiers Media S.A. 2022-09-01
Series:Frontiers in Animal Science
Subjects:
bioenergetics
breed composition
Girolando
indirect calorimetry
maintenance
Online Access:https://www.frontiersin.org/articles/10.3389/fanim.2022.919515/full

Internet

https://www.frontiersin.org/articles/10.3389/fanim.2022.919515/full

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