| Registro completo |
| Provedor de dados: |
R. Bras. Zootec.
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| País: |
Brazil
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| Título: |
Efficiency of calf production of cows from two genetic groups
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| Autores: |
Ítavo,Luís Carlos Vinhas
Euclides Filho,Kepler
Torres Júnior,Roberto Augusto de Almeida
Ítavo,Camila Celeste Brandão Ferreira
Nogueira,Ériklis
Dias,Alexandre Menezes
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| Data: |
2014-07-01
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| Ano: |
2014
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| Palavras-chave: |
Body size
Calf performance
Crossbreed
Efficiency
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| Resumo: |
The objective was to evaluate the effect of weight, age and production efficiency of cows from genetic groups based on the calf weight at calving and at weaning. For a period of five years, data of 120 cows (60 Angus-Nellore (AN) and 60 Simmental-Nellore (SN)) at four to nine-years of age were evaluated. All cows were maintained on Brachiaria decumbens pastures, with two forage availability levels (high and low), distributed in a randomized-block design. The cows were placed together with Canchim bulls to generate the crossbred calves. A supplement, consisting of 200 g/kg crude protein and 820 g/kg of total digestible nutrients, was provided to the calves in creep feeding until 210 days-old (weaning). Supplement had a significant effect on the weight of the cow at calving and weaning. The average weights of the Angus-Nellore cows were 529.19 and 514.23 kg at calving and on the weaning day, respectively. These values were higher for Simmental-Nellore cows, which presented 569.60 and 542.59 kg, respectively. The male-calf weight at weaning was 254.69 kg, which was higher than the females (237.70 kg). Genetic group had no effect on weaning weight. The average weight for Canchim × Angus-Nellore calves was 243.41 kg and for Canchim × Simmental-Nellore it was 248.98 kg. Cow age affected weaning weight, promoting a linear increase of 0.804 kg in the weaning weight each year. Younger and smaller cows (Angus-Nellore) are more efficient for calf production.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000700390
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| Editor: |
Sociedade Brasileira de Zootecnia
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| Relação: |
10.1590/S1516-35982014000700008
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Zootecnia v.43 n.7 2014
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| Direitos: |
info:eu-repo/semantics/openAccess
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