GM 12. Preweaning growth of Bos taurus x Bos indicus crossbred calves
Birth weight (PN), weaning weight (PD), weaning age (ED) and daily gain weight (GDP) were evaluated in 543 crossbred calves in a farm, located in Zulia State, Venezuela. Data were analyzed by the least squares method, considering the predominance of calf breed (R: PH=Holstein, PS=Brown Swiss and PB=Brahman), year of birth (A: 1985 to 1991), season of birth (E: dry, intermediate, rainy), sex (S: M=male F=female), number of calving (NP: 1,2, 3 y =4), and its interactions, and the linear regression of calving age and milk production. PN was affected (P<.01) by S (M=31.9 ± 0.2 vs F=28.0 ± 0.2 kg). PD was affected by A, S and NP, while R, A, E, S and NP were affected (P<.01) by ED and GDP. PN, PD, ED and GDP means (± ES) were 30.5 ± 0.3 kg, 158.8 ± 4.5 kg, 9.8 ± 0.2 m and 447.3 ± 35 g/día respectively. P, ED, and GDP was superior (P<.05) in (187.4 ± 9.5; 8.7 ± 0.6 m 614.3 ± 61 g/día respectively). Primiparous cows weaned calves (P<.05) with lower PD (151.6 ± 7.1 kg) and GDP (445.3 ± 51 g/día) and higher ED (10.0 ± 0.5m). Year of birth, sex, and number of calving should be considered as an important genetic factors, in the evaluation of the preweaning growth.
| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Asociacion Latinoamericana de Produccion Animal
2005
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| Online Access: | https://ojs.alpa.uy/index.php/ojs_files/article/view/347 |
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| Summary: | Birth weight (PN), weaning weight (PD), weaning age (ED) and daily gain weight (GDP) were evaluated in 543 crossbred calves in a farm, located in Zulia State, Venezuela. Data were analyzed by the least squares method, considering the predominance of calf breed (R: PH=Holstein, PS=Brown Swiss and PB=Brahman), year of birth (A: 1985 to 1991), season of birth (E: dry, intermediate, rainy), sex (S: M=male F=female), number of calving (NP: 1,2, 3 y =4), and its interactions, and the linear regression of calving age and milk production. PN was affected (P<.01) by S (M=31.9 ± 0.2 vs F=28.0 ± 0.2 kg). PD was affected by A, S and NP, while R, A, E, S and NP were affected (P<.01) by ED and GDP. PN, PD, ED and GDP means (± ES) were 30.5 ± 0.3 kg, 158.8 ± 4.5 kg, 9.8 ± 0.2 m and 447.3 ± 35 g/día respectively. P, ED, and GDP was superior (P<.05) in (187.4 ± 9.5; 8.7 ± 0.6 m 614.3 ± 61 g/día respectively). Primiparous cows weaned calves (P<.05) with lower PD (151.6 ± 7.1 kg) and GDP (445.3 ± 51 g/día) and higher ED (10.0 ± 0.5m). Year of birth, sex, and number of calving should be considered as an important genetic factors, in the evaluation of the preweaning growth. |
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