Data/hora: 03/06/2024 18:11:56

Biblioteca(s): | Epagri-Sede.
Data corrente: | 01/06/2023
Data da última atualização: | 01/06/2023
Autoria: | KNOB, D. A.; SCHOLZ, A. M.; PERAZZOLI, L.; MENDES, B. P. B.; KAPPES, R.; ALESSIO, D. R. M.; RECH, Â. F.; THALER NETO, A.
Título: | Feed Efficiency and Physiological Parameters of Holstein and Crossbred Holstein × Simmental Cows.
Ano de publicação: | 2023
Fonte/Imprenta: | Animals, Basel, Switzerland., v. 13, n. 10, p. 1-13, 2023.
Idioma: | Inglês
Conteúdo: | This study aimed to compare the feed efficiency (FE) and physiological parameters of Holstein and crossbred Holstein × Simmental cows in a confinement system during winter and summer. The study was conducted in a dairy farm in southern Brazil by including a total of 48 multiparous cows. The cows were studied for 21 days in two periods, summer and winter, and their daily dry matter intake (DMI), milk yield (MY), rectal temperature (RT), respiratory rate (RR), body weight, and body condition score were recorded. An analysis of variance was conducted using the SAS statistical package. The results showed that crossbred Holstein × Simmental cows have a similar FE as Holstein cows in a high-production system (1.83 × 1.81 kg DMI/kg MY, respectively), and they can achieve the same production levels as purebred Holstein cows (43.8 vs. 44.5 milk/cow/day). Our findings indicated a difference for the period as both genetic groups achieved higher FE in winter than in summer (1.98 vs. 1.67 DMI/kg MY, respectively). In addition, we found evidence that crossbred cows are better at dissipating body heat during heat-stress situations, as they have higher RR in summer compared to purebred cows, while Holstein cows have higher RT in summer afternoons than crossbred cows. Therefore, using crossbred Holstein × Simmental cows is an alternative for high-production systems.
Thesagro: | dry matter intake; heat stress; milk yield; rumination time.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_57560.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
Exemplares: | Epagri-Sede - (108282-1) - UPC - AP - DD -  -  -  - DIS