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Abstract

This chapter discusses the energy requirements of zebu and Nelore beef cattle, including the net and metabolizable energy requirements for maintenance and weight gain. A database made to update the nutrient requirements of zebu beef cattle based on 25 studies developed under Brazilian conditions is ...

Author(s)
Marcondes, M. I.; Chizzotti, M. L.; Valadares Filho, S. de C.; Gionbelli, M. P.; Paulino, P. V. R.; Paulino, M. F.
Publisher
Federal Univeristy of Vicosa, Department of Animal Science, Vicosa, Brazil
Citation
Nutrient requirements of Zebu beef cattle - BR - Corte, 2010, Ed.2, pp 81-106
Abstract

This chapter covers the prediction of dry matter intake by cattle in feedlots. The equations used to predict dry matter intake as well as their development are presented.

Author(s)
Azevêdo, J. A. G.; Valadares Filho, S. de C.; Pina, D. dos S.; Valadares, R. F. D.; Detmann, E.
Publisher
Federal Univeristy of Vicosa, Department of Animal Science, Vicosa, Brazil
Citation
Nutrient requirements of Zebu beef cattle - BR - Corte, 2010, Ed.2, pp 1-11
Abstract

This chapter presents the protein requirements for maintenance and weight gain of zebu beef cattle as well as the equations used in estimating them. The efficiency of metabolizable protein utilization for gain is also discussed. Moreover, protein requirement tables for Nelore purebred, crossbred...

Author(s)
Marcondes, M. I.; Gionbelli, M. P.; Valadares Filho, S. de C.; Chizzotti, M. L.; Paulino, M. F.
Publisher
Federal Univeristy of Vicosa, Department of Animal Science, Vicosa, Brazil
Citation
Nutrient requirements of Zebu beef cattle - BR - Corte, 2010, Ed.2, pp 107-125
Abstract

This chapter discusses the macromineral (calcium, phosphorus, magnesium, sodium and potassium) requirements for maintenance of zebu beef cattle described by some systems of nutritional requirements that exist worldwide as well as the results obtained from studies conducted in Brazil. Models for the ...

Author(s)
Gionbelli, M. P.; Marcondes, M. I.; Valadares Filho, S. de C.; Prados, L. F.
Publisher
Federal Univeristy of Vicosa, Department of Animal Science, Vicosa, Brazil
Citation
Nutrient requirements of Zebu beef cattle - BR - Corte, 2010, Ed.2, pp 127-165
Abstract

This chapter covers the prediction of the energy value of cattle diets based on the chemical composition of feed. Focus is given on submodels developed and validated to predict digestible fractions of ether extract (EE), non-fibrous carbohydrates (NFC), neutral detergent fibre (NDF) and crude...

Author(s)
Detmann, E.; Valadares Filho, S. de C.; Paulino, M. F.
Publisher
Federal Univeristy of Vicosa, Department of Animal Science, Vicosa, Brazil
Citation
Nutrient requirements of Zebu beef cattle - BR - Corte, 2010, Ed.2, pp 45-60
Abstract

This chapter presents the energy, protein and mineral requirements of lactating Nelore cows and calves. Various models and techniques used to estimate the nutrient requirements, milk production and milk composition are discussed.

Author(s)
Paulino, P. V. R.; Fonseca, M. A.; Henriques, L. T.; Valadares Filho, S. de C.; Detmann, E.
Publisher
Federal Univeristy of Vicosa, Department of Animal Science, Vicosa, Brazil
Citation
Nutrient requirements of Zebu beef cattle - BR - Corte, 2010, Ed.2, pp 167-185
AbstractFull Text

We evaluated and compared adaptative variations of Type IV functional response models - characterized by a quadratic model - for estimating short-term intake rate (STIR) by grazing cattle. Two experiments were carried out in Cynodon dactylon and Avena strigosa with swards representing different...

Author(s)
Mezzalira, J. C.; Bremm, C.; Fonseca, L.; Mezzalira, C. C.; Oliveira Neto, R. A.; Correia, L. H. S.; Carvalho, P. C. F.
Publisher
Polskie Towarzystwo Łąkarskie (Polish Grassland Society), Poznań, Poland
Citation
Grassland - a European resource? Proceedings of the 24th General Meeting of the European Grassland Federation, Lublin, Poland, 3-7 June 2012, 2012, pp 246-248
AbstractFull Text

Records of 152 145 test-day (TD) milk yields, from 7,317 complete first lactations of Holstein cattle raised in Brazil were analysed. Estimate covariance functions for additive genetic and permanent environmental effects, as well as the genetic parameters for TD milk records using random regression ...

Author(s)
Bignardi, A. B.; El-Faro, L.; Cardoso, V. L.; Machado, P. F.; Albuquerque, L. G.
Publisher
Instituto Prociência, Minas Gerais, Brazil
Citation
Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006, 2006, pp 01-49
AbstractFull Text

Relationships among mature weight, maturing rate and longevity (age at disposal) were studied in 256 Holstein-Friesian cows born from 1992 to 2001 and raised in the dairy cattle production system of Embrapa Southeast Cattle, São Carlos, São Paulo, Brazil. The linear model included the fixed effects ...

Author(s)
Coelho, J. G.; Barbosa, P. F.
Publisher
Instituto Prociência, Minas Gerais, Brazil
Citation
Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006, 2006, pp 01-52
AbstractFull Text

The objective of this study was to verify the genetic and phenotypic trends for birth weight (BW), weaning weight (WW) and 205 days adjusted weaning gain (WG). The analyses were performed using a maternal effects mixed model and variance components estimated by restricted maximum likelihood,...

Author(s)
Corrêa, M. B. B.; Dionello, N. J. L.; Campos, L. T.; Cardoso, F. F.
Publisher
Instituto Prociência, Minas Gerais, Brazil
Citation
Proceedings of the 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006, 2006, pp 03-59

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