Journal of Animal Behaviour and Biometeorology
Journal of Animal Behaviour and Biometeorology
Research Article Open Access

Ingestive behavior of Holstein × Zebu cows managed on deferred supplemented pasture

Thamara Amaral Diniz, Cinara da Cunha Siqueira Carvalho, Victória Leite de Matos, José Reinaldo Mendes Ruas, Hugo Pereira Santos, Maria Dulcinéia da Costa, Mário Henrique França Mourthé, Layza Lorena Medeiros Fonseca, Hellem Cristiane Mendes Rocha, Flávio Pinto Monção, Vicente Ribeiro Rocha Júnior

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This study aimed to evaluate the ingestive behavior of F1 Holstein × Zebu cows grazing on deferred pasture receiving different supplementation strategies. The experimental design was completely randomized, in a 3×4 factorial, with three supplementation strategies and four evaluation periods. The ingestive behavior of 24 cows divided into three groups of supplementation provided at milking was observed, and two of these groups received protein in the pasture. Ingestive behavior was monitored every 10 minutes for 24 hours and analyzed in the form of periods (morning, afternoon, night, and dawn) and total time. The animals remained longer grazing during the afternoon when the BGHI presented values ​​of 83.8. Protein consumption did not influence grazing time but interfered with forage consumption. For the total grazing time, the animals in group 2 spent less time grazing. The groups of animals presented no difference concerning the time spent on rumination and idleness. During night and dawn, when the climate was characterized as thermal comfort, the animals spent more time ruminating. The climatic conditions did not influence the ingestive behavior, as the grazing peak was observed at times of higher BGHI. However, supplementation of the animals in group 2 modified the ingestive behavior of F1 H × Z cows.


BGHI, crossbred dairy cattle, environment, ethology, supplementation


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