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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Universidade Estadual de Maringá
2021
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=303168054043 https://www.redalyc.org/journal/3031/303168054043/ https://www.redalyc.org/journal/3031/303168054043/html/ https://www.redalyc.org/journal/3031/303168054043/303168054043.epub https://www.redalyc.org/journal/3031/303168054043/movil |
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Sommario:
- Influence of meteorological elements on behavioral responses of gir cows and effects on milk quality Marcos Vinícius da Silva Gledson Luiz Pontes de Almeida Héliton Pandorfi Alex Souza Moraes Gleidiana Amélia Pontes de Almeida Macêdo Pedro Henrique Dias Batista Rodes Angelo Batista da Silva Cristiane Guiselini Agrociencias cooling somatic cells Animal activity principal components This study aimed to analyze the principal components of the meteorological variables, physiological and behavioral response of cows subjected to different cooling times and their influence on milk quality, in the dry and rainfall periods, and to establish multiple regression models for milk quality. The data used in the study came from an experiment conducted in the Agreste Region of Pernambuco. The pre-milking cooling time was 10, 20, 30 min. and the control (without cooling). Sixteen multiparous lactating Gir cows were selected. Data were analyzed by principal component analysis and a multiple regression analysis was applied to determine milk quality. There was a strong relationship between somatic cell count (SCC) and activity of the animal in the shade for dry, and lying for rainfall, with increased SCC in cow milk. It was possible to establish two multiple regression models to determine milk quality in dry and rainfall periods. According to the principal component analysis, the cooling time to meet the thermal requirement of the animals was 20 min., regardless of the season and milking shift. 2021 artículo científico 1806-2636 https://www.redalyc.org/articulo.oa?id=303168054043 https://www.redalyc.org/journal/3031/303168054043/ https://www.redalyc.org/journal/3031/303168054043/html/ https://www.redalyc.org/journal/3031/303168054043/303168054043.epub https://www.redalyc.org/journal/3031/303168054043/movil 10.4025/actascianimsci.v43i1.52604 en http://www.redalyc.org/revista.oa?id=3031 Acta Scientiarum. Animal Sciences application/pdf Universidade Estadual de Maringá Acta Scientiarum. Animal Sciences (Brasil) Vol.43