Comportamento ingestivo de bezerros da raça Jersey alimentados com níveis de suplementação em capim aruana
The aim of this study was to evaluate the ingestive behavior of Jersey breed calves fed supplementation levels in aruana grass. The experimental design used was completely randomized with three treatments (supplementation levels) and three area replications. The supplementation levels used were 8, 1...
| Autor principal: | Sauthier, Lucas Henrique |
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| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2022
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/28434 |
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| Resumo: |
The aim of this study was to evaluate the ingestive behavior of Jersey breed calves fed supplementation levels in aruana grass. The experimental design used was completely randomized with three treatments (supplementation levels) and three area replications. The supplementation levels used were 8, 11 and 14 g kg−1 of body weight of a commercial supplement with 12% crude protein. The grazing system was continuous stocking with variable load, using two test animals per paddock. At the beginning of the experiment and every 28 days, the animals were individually weighed after a 14-hour fast. Visual assessments of ingestive behavior were performed for 13 hours (06:30 to 19:30) in 02/14, 03/14 and 04/14/2020, every 10 minutes by trained evaluators. Height, forage mass, forage supply and daily forage accumulation rate were not altered (P>0.05) by supplementation levels. The animal load was higher (P<0.05) in the two highest levels of supplementation in relation to the lowest level of supplementation, with no difference between the highest levels. The grazing time was lower (P<0.05) for the highest supplementation level in relation to the others, which did not differ from each other. The time allocated to other activities (rest time), on the other hand, was higher (P<0.05) at the highest level of supplementation in relation to the others, which did not differ from each other. Rumination time was not altered (P>0.05) by supplementation levels. The number of steps/day, bites/day and feeding seasons/day were not changed (P>0.05) by supplementation levels. The number of feeding stations/minute and the time per feeding season were higher (P<0.05) for animals fed with the highest supplementation level in relation to the lowest supplementation level, with no difference for the other comparisons between treatments. The number of steps/minute was influenced (P<0.05) by the supplementation level, being higher for the animals fed with the highest supplementation level in relation to the others, which did not differ from each other. Under similar forage supply conditions in Aruana grass, the increase in the level of energy supplementation from 8 to 14 g kg−1 of body weight changes the ingestive behavior of Jersey calves as the animals increase their rest time, improving animal welfare.. |
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