Energy requirements of Nellore purebred and crossbreed with Angus and Simmental

  title={Energy requirements of Nellore purebred and crossbreed with Angus and Simmental},
  author={M. Marcondes and S. Filho and I. M. Oliveira and M. F. Paulino and P. Paulino and E. Detmann and Luiz Fernando Costa e Silva},
  journal={Revista Brasileira De Zootecnia},
The objective of this work was to estimate the nutritional requirements of net and metabolizable energy of Nellore, Nellore-Angus and Nellore Simmental cattle, as well as the efficiency of utilization of metabolizable energy for gain and maintenance and efficiency of energy deposition in the form of protein and fat. It was used 69 animals (23 Nellore, 23 Nellore-Angus and 23 Nellore-Simmental): four animals from each genetic group (12 in total) were slaughtered before the beginning of the… Expand
Effect of dietary protein content on performance, feed efficiency and carcass traits of feedlot Nellore and Angus × Nellore cross cattle at different growth stages
It is found that crossbred animals (F1 Angus × Nellore) not only had greater performance, but also better carcass traits compared with Nellores, representing an option for increasing productivity. Expand


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
Body composition and energy utilization by steers of diverse genotypes fed a high-concentrate diet during the finishing period: II. Angus, Boran, Brahman, Hereford, and Tuli sires.
Evaluation by nonlinear regression indicated that heat production increased exponentially and energy gain increased asymptotically as feed intake increased above maintenance as well as energy requirements for maintenance and efficiency of energy use for energy gain differed among sire breeds. Expand
Eficiência de utilização da energia metabolizável em bovinos Nelore puros e cruzados submetidos a quatro níveis de concentrado na ração
The requirement of MEt and MEg per unit of empty body weight (EBW) decreased as body weight increased indicating a greater efficiency of metabolizable energy utilization. Expand
Estimation of maintenance energy requirements of beef cattle and sheep
An estimate of metabolizable energy required for maintenance (MEm) was obtained in beef cattle and sheep studies between 1993 and 1996, which were proportionately 0·34 higher in cattle and 0·32 higher in sheep than the 1990 values of the UK Agricultural and Food Research Council. Expand
Comparison of cattle of a five-breed diallel: size, growth, condition and pubertal characters of second-generation heifers.
Heterosis generally was positive and, when expressed as a percentage, decreased with age, which is in agreement with other research reports, while Holsteins and Brahmans were largest for growth and size characters, whereas Jerseys were smallest. Expand
Desempenho de bezerros da raça Nelore e cruzados desmamados recebendo concentrado em pastagem adubada de Cynodon dactylon cv. Coastcross
The genetic group affects performance of cattle grazing coastcross and shows interaction with supplementation of diet with concentrate. Expand
Desempenho de Tourinhos Cruzados em Dietas de Alto Teor de Concentrado com Bagaço de Cana-de-Açúcar como Único Volumoso
Evaluating the performance of crossbred bulls of British or Continental paternal breed, fed high concentrate diets containing 9, 15 or 21% of the dry matter with sugarcane bagasse (BIN) in a 2 x 3 factorial arrangement suggests that high concentration diets with levels as low as 9% of BIN can be used. 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
Teste para verificar a identidade de modelos de regressão
Neste trabalho foi considerado o ajustamento de H equacoes de regressao no caso de justaposicao de r submodelos polinomiais de grau k, em que os pontos de intersecao dos submodelos foram consideradosExpand