Data/hora: 19/06/2024 19:53:05

Biblioteca(s): | Embrapa Gado de Leite.
Data corrente: | 15/01/2018
Data da última atualização: | 27/01/2023
Autoria: | FURINI, P. M.; AZEVEDO, R. A.; RUFINO, S. R.; MACHADO, F. S.; CAMPOS, M. M.; PEREIRA, L. G. R.; TOMICH, T. R.; CARVALHO, B. C. de; SANTOS, G. B.; COELHO, S. G.
Afiliação: | P. M. Furini, UFMG; R. A. Azavedo, UFMG; S. R. Rufino, UFMG; F. S. Machado; MARIANA MAGALHAES CAMPOS, CNPGL; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; THIERRY RIBEIRO TOMICH, CNPGL; BRUNO CAMPOS DE CARVALHO, CNPGL; G.B. Santos; S. G. Coelho, Universidade Federal Fluminense.
Título: | The effects of increasing amounts of milk replacer powder added to whole milk on mammary gland measurements using ultrasound in dairy heifers.
Ano de publicação: | 2017
Fonte/Imprenta: | Journal of Dairy Science, v. 101, p. 767-773, 2017.
Idioma: | Inglês
Conteúdo: | Abstract The aim of this study was to determine the effect of increasing total solids (TS) in the liquid diet during the preweaning phase on mammary gland development in dairy heifers. The increase in TS was obtained with the addition of milk replacer powder to whole milk. Crossbreed Holstein-Gyr heifers (n = 60) were distributed in 4 treatments with different TS concentrations: 13.5% (n = 15), 16.1% (n = 15), 18.2% (n = 15), and 20.4% (n = 15). The liquid diets were provided from 5 to 55 d of age. From 56 to 59 d of age, the total amount of liquid feed was reduced by half. Heifers were weaned at 60 d and monitored until 90 d of age. Ultrasound mammary gland evaluations were performed weekly between 5 to 11 wk of age, using a B-mode ultrasound equipped with microconvex transducer at a frequency of 6 MHz. In those same weeks, the manual palpation of mammary parenchyma (PAR) was performed. Increased TS concentration of liquid diet during the preweaning period increased body weight of heifers, but did not alter PAR growth and the deposition of adipose tissue in the mammary gland evaluated by ultrasonography. The oval-shaped structure of PAR was altered after 2 mo of age. In the evaluated period, PAR growth was isometric with respect to the body growth rate. Palpation scoring of PAR had a strong correlation with the ultrasound evaluation of the PAR.
Palavras-Chave: | Development; Palpation score; Parenchymal area.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Gado de Leite (CNPGL)
Exemplares: | CNPGL - (23865-1) - UPC - AP - DD -  -  -  - DIS