Data/hora: 03/06/2024 11:55:16

Biblioteca(s): 	Embrapa Gado de Leite.	
Data corrente: 	11/08/2021	
Data da última atualização: 	11/08/2021	
Autoria: 	RIBEIRO, L. dos S.; BRANDÃO, F. Z.; CARVALHEIRA, L. de R.; GOES, T. J. de F.; TORRES FILHO, R. de A.; QUINTAO, C. C. R.; PIRES, M. de F. A.; CAMARGO, L. S. de A.; CARVALHO, B. C. de.	
Afiliação: 	LILIAN DOS SANTOS RIBEIRO, Universidade Federal Fluminense; FELIPE ZANDONADI BRANDÃO, Universidade Federal Fluminense; LUCIANO DE REZENDE CARVALHEIRA, Universidade Federal de Minas Gerais; TÚLIO JOSÉ DE FREITAS GOES, Universidade Federal Fluminense; RODOLPHO DE ALMEIDA TORRES FILHO, Universidade Federal Fluminense; CAROLINA CAPOBIANGO ROMANO QUINTAO, CNPGL; MARIA DE FATIMA AVILA PIRES, CNPGL; LUIZ SERGIO DE ALMEIDA CAMARGO, CNPGL; BRUNO CAMPOS DE CARVALHO, CNPGL.	
Título: 	Chromium supplementation improves glucose metabolism and vaginal temperature regulation in Girolando cows under heat stress conditions in a climatic chamber.	
Ano de publicação: 	2020	
Fonte/Imprenta: 	Tropical Animal Health and Production, v. 52, p. 1661-1668, 2020.	
DOI: 	https://doi.org/10.1007/s11250-019-02173-w	
Idioma: 	Inglês	
Conteúdo: 	This study aimed to evaluate chromium supplementation on productive, reproductive, and metabolic parameters at lactating Girolando cows subjected to heat stress conditions in a climatic chamber. Thirty-six lactating Girolando cows were subjected to two sequential trials. In trial 1 (thermoneutral environment), the effect of chromium supplementation was evaluated (0 vs. 0.50mg/kg of drymatter). In trial 2, the cows were fed the same diets, but they were divided into three environmental conditions: heat stress conditions in climatic chamber, fed ad libitum (HS); thermoneutral environment, fed ad libitum (TN); and thermoneutral environment, pair-fed (PF). In thermoneutral conditions, chromium supplementation did not affect productive or metabolic parameters, although supplemented cows had lower viability of oocytes (65.11 ± 0.08% vs. 76.86 ± 0.08%). During heat stress, chromium supplementation lowered plasma glucose levels (61.17 ± 1.90 vs. 67.11 ± 1.90 mg/dL), and increased the insulin:glucose ratio (0.39 ± 0.04 vs. 0.27 ± 0.04). Cows fed the control diet in the HS group had higher vaginal temperature values (39.40 ± 0.10 °C) than the cows in the TN group and PF group (38.89 ± 0.10 °C and 38.85 ± 0.11 °C, respectively). However, supplemented cows heat-stressed maintained the same vaginal temperature as cows in thermoneutral conditions. In conclusion, chromium supplementation improved glucose metabolism and prevented body temperature increases under heat stress conditions.	
Palavras-Chave: 	Composição do leite.	
Thesagro: 	Bovino; Gado Leiteiro; Glicose; Insulina; Metabolismo; Reprodução Animal.	
Thesaurus Nal: 	Animal reproduction; Dairy cattle; Glucose; Insulin; Metabolism; Milk composition.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Gado de Leite (CNPGL)	
Exemplares: 	CNPGL - (25176-1) - UPC - AP - DD -  -  -  - DIS