Energy and protein requirements for Nellore steers estimated with the deuterium oxide marker

Autor:	M. Z. Moreira, Angélica Simone Cravo Pereira, Gabriela Aferri, Saulo da Luz e Silva, Paulo Roberto Leme, Rosana Rüegger Pereira da Silva Corte
Rok vydání:	2020
Předmět:	Pharmacology Nutrient Animal science Deuterium medicine Composition (visual arts) Dry matter Protein requirement medicine.symptom Body weight Zebu Weight gain Mathematics
Zdroj:	Boletim de Indústria Animal. 77
ISSN:	1981-4100 0067-9615
DOI:	10.17523/bia.2020.v77.e1487
Popis:	The aim of this study was determine the energy and protein requirements for maintenance and gain of Nellore steers. Thirty six Nellore steers with a average weight and age of 359±13 kg and 20 months at the beginning of the trial were individually fed for 56. The steers were fed the same diet (76.43% TDN and 13.62% CP) in three levels of dry matter (DM) intake, ad libitum, 75 g DM/kg BW0.75 and 60 g DM/kg BW0.75. The initial and final body composition was estimated with the marker deuterium oxide that allowed repeated water estimate in the same animal. Deuterium in blood samples was analyzed by mass spectrometry. The effects of intake levels, comparison of intercept and slope among feeding level, and equations were evaluated by the analysis of variance, adopting P
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7de7a5a3051458947fde358f53aa07af https://doi.org/10.17523/bia.2020.v77.e1487 Zobrazit plný text záznamu