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Rumen-protected methionine modulates body temperature and reduces the incidence of heat stress temperatures during the hottest hours of the day of grazing heat-stressed Bos indicus beef cows.
Izquierdo, Vinicius de Souza; da Silva Menezes, Bernardo; Lopes, Matheus Gomes; Malaguez, Edgard Gonçalves; Lopes, Fernanda; Pereira, Fabricio Molina; Brauner, Cassio Cassal; Moriel, Philipe; Corrêa, Marcio Nunes; Schmitt, Eduardo.
Afiliación
  • Izquierdo VS; Range Cattle Research and Education Center, University of Florida, Ona, Florida.
  • da Silva Menezes B; Center for Research, Education and Extension in Livestock (NUPEEC), Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.
  • Lopes MG; Center for Research, Education and Extension in Livestock (NUPEEC), Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.
  • Malaguez EG; Programa de Pós-Graduação em Zootecnia FAEM UFPel, Pelotas, Rio Grande do Sul, Brazil.
  • Lopes F; Center for Research, Education and Extension in Livestock (NUPEEC), Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.
  • Pereira FM; Elanco São Paulo, São Paulo, Brazil.
  • Brauner CC; Center for Research, Education and Extension in Livestock (NUPEEC), Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.
  • Moriel P; Programa de Pós-Graduação em Zootecnia FAEM UFPel, Pelotas, Rio Grande do Sul, Brazil.
  • Corrêa MN; Adisseo Brasil São Paulo, São Paulo, Brazil.
  • Schmitt E; Molina Assessoria Pecuária, Marabá, Pará, Brazil.
Anim Sci J ; 95(1): e13980, 2024.
Article en En | MEDLINE | ID: mdl-39054255
ABSTRACT
This study evaluated the effects of supplementation of rumen-protected methionine (RPM) on body thermoregulation and conception rate of Nelore cows exposed to high temperature-humidity index (THI). On -31 days before the artificial insemination protocol, 562 lactating, multiparous cows were assigned to receive (MG) or not (CG) RPM supplementation (3 g/cow mixed into 100 g of mineral supplement). Both groups remained in tropical pastures and received supplementation for 77 days. A subset of cows (n = 142) remained with an intravaginal thermometer collecting intravaginal temperature (IT). The respective minimum, average, and maximum environmental THI were 72.8, 78.0, and 83.3. Effects of treatment × hour of the day were detected (P < 0.0001) for IT. From 1330 to 1730 h and 1830 to 1900 h, IT was higher (P < 0.05) for CG versus MG cows when exposed to moderate and high THI. The supplementation with RPM did not affect conception rate (CG = 64.4% vs. MG = 58.2%; P > 0.05). In conclusion, 3 g of RPM supplementation lowered internal body temperature and possibly altered critical THI threshold in Nelore cows with no impact on reproduction.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Rumen / Temperatura Corporal / Suplementos Dietéticos / Metionina Límite: Animals Idioma: En Revista: Anim Sci J Asunto de la revista: MEDICINA VETERINARIA Año: 2024 Tipo del documento: Article Pais de publicación: Australia
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Rumen / Temperatura Corporal / Suplementos Dietéticos / Metionina Límite: Animals Idioma: En Revista: Anim Sci J Asunto de la revista: MEDICINA VETERINARIA Año: 2024 Tipo del documento: Article Pais de publicación: Australia