Nutrient requirements of energy and protein for Holstein × Zebu bulls finished in feedlot.

  title={Nutrient requirements of energy and protein for Holstein × Zebu bulls finished in feedlot.},
  author={P. Rotta and S. Filho and E. Detmann and Luiz Fernando Costa e Silva and F. Villadiego and Eusebio Manuel Galindo Burgos and F.A.S. Silva},
  journal={Semina-ciencias Agrarias},
Objetivou-se com este estudo estimar as exigencias nutricionais de energia e proteina em bovinos cruzados (Holandes × Zebu). Um experimento de abate comparativo foi conduzido com 44 (24 meses) bovinos cruzados pesando 338± 39 kg. Os bovinos foram aleatoriamente separados como segue: quatro bovinos para o grupo referencia, quatro bovinos para o grupo mantenca e 36 bovinos alimentados ad libitum . Foram uilizadas a silagem de milho (SM) e a cana-de-acucar in natura (CA) nas proporcoes de 60 ou 40… Expand

Figures and Tables from this paper

Energy and protein requirements of crossbred cattle in feedlot Exigências energéticas e proteicas de bovinos mestiços em confinamento
The objective of this study is to predict the energy and protein requirements of crossbred dairy cattle in feedlot. The study was conducted at the Unidade Acadêmica de Serra Talhada, UniversidadeExpand
The impact of dietary sugarcane addition to finishing diets on performance, apparent digestibility, and fatty acid composition of Holstein × Zebu bulls.
The findings of the present study indicate that SC40:60 can replace CS60:40 and CSR in finishing diets and, moreover, roughage source significantly altered the FA composition of crossbred Holstein × Zebu bulls LM. Expand
Energy and protein requirements of crossbred (Holstein × Gyr) growing bulls.
The estimates of energy and protein requirements presented herein are more appropriate than the National Research Council dairy cattle model and the Brazilian BR-CORTE system to balance the diets of crossbred (Holstein × Gyr) growing bulls. Expand
Energy partition, nutritional energy requirements and methane production in F1 Holstein × Gyr bulls, using the respirometric technique
The nutritional energy requirements of animals for maintenance and weight gain, such as the energy partition of the diet, were determined in different feeding plans. Fifteen F1 Holstein × Gyr,Expand
Energy and protein requirements of Holstein × Gyr crossbred heifers.
The equations generated in the present study should be used to estimate energy and protein requirements for Holstein × Gyr crossbred dairy heifers raised in tropical conditions in the post-weaning phase up to 185 kg of BW. Expand
Energy requirements for pregnant dairy cows
Net energy and metabolizable energy requirements for maintenance of non-pregnant cows are different from pregnant cows, and the proposed non-linear equations to estimate net energy requirements are more adequate than current NRC equation and should be recommended for Holstein × Gyr cows. Expand
Energy Requirements of Beef Cattle: Current Energy Systems and Factors Influencing Energy Requirements for Maintenance
The re-evaluation of the concept of diet metabolisability and the analysis of existing data on compensatory growth responses are recommended for future updates of the British system for predicting energy requirements in beef cattle having in to account the particularities of grass-based systems in the UK. Expand
Changes in maternal body composition, development of the conceptus and estimation of energy requirements for pregnant crossbred Holstein x Gyr cows
This monograph discusses the changes in body composition changes of crossbred Holstein × Gyr cows and conceptus during pregnancy and the energy requirements for pregnant pregnant Holstein gyr cows. Expand


Exigências nutricionais, validação de equações para a estimação da composição do corpo vazio e uso da creatinina para estimar a proporção de tecido muscular em bovinos Nelore
The aims of this study were evaluate the intake of dry matter (DMI) and their nutrients, average daily gain (ADG), nutrients digestibility and microbial efficiency and understand the growthExpand
Avaliação dos teores de fibra em detergente neutro em forragens, concentrados e fezes bovinas moídas em diferentes tamanhos e em sacos de diferentes tecidos
Two experiments were carried out to evaluate the effects of particles sizes on contents of neutral detergent fiber (NDF) by using nylon bags F57 (Ankom®) and non-woven textile (NWT 100 g/m2). In theExpand
A meta-analysis of energy and protein requirements for maintenance and growth of Nellore cattle.
The results do not support the hypothesis that bulls have greater NE(m) requirements than steers and heifers, and no significant differences in the NP(m), NE(g), and net protein for maintenance (NP(m)) and growth ( NP(g) requirements were detected. Expand
Energy requirement for maintenance and growth of Nellore bulls and steers fed high-forage diets.
Data from three comparative slaughter experiments with individually fed Nellore bulls and steers were utilized to determine their NEm and NEg requirements when fed high-forage diets, indicating that bulls had a greater ME requirement for maintenance than steers. Expand
ASAS centennial paper: net energy systems for beef cattle--concepts, application, and future models.
Development of a series of models has been described to show examples of the conceptual evolution of dynamic, mechanistic models and their applications and generally with each new system, advances in prediction accuracy came about by adding new terms to conceptually validated models. Expand
A decision support system to improve individual cattle management. 1. A mechanistic, dynamic model for animal growth
Abstract A deterministic and mechanistic growth model was developed to dynamically predict growth rate, accumulated weight, days required to reach target body composition, carcass weight (CW) andExpand
Exigências nutricionais de zebuínos e tabelas de composição de alimentos - BR CORTE
  • Viçosa : UFV, Suprema Gráfica Ltda,
  • 2006
Desempenho produtivo e exigências nutricionais de fêmeas Nelore em crescimento .
  • Estimation of the composition of beef carcasses and cuts
  • 2010