Ultrasonography in the validation of body condition score in Holstein - zebu cows during the transition period and early lactation
| Autor: | Gentil, Narjara Rodrigues |
|---|---|
| Přispěvatelé: | Santos, Anselmo Domingos Ferreira |
| Jazyk: | portugalština |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Repositório Institucional da UFS Universidade Federal de Sergipe (UFS) instacron:UFS |
| Popis: | Fundação de Apoio a Pesquisa e à Inovação Tecnológica do Estado de Sergipe - FAPITEC/SE The body condition score (BCS) is a method of assessment of the animal's energy reserves and it was developed based on the characteristics of mobilization/ deposition of cow’s fat cows with degree of Holstein blood Therefore, it is not known whether this methodology is appropriate for crossbred cows. Thus, the objective with this study to investigate the relationship between the back fat thickness (BFT) and the body condition score (BCS) in crossbred cows (Holstein - Zebu) during the transition period and early lactation, and to relate these findings with productive and metabolic parameters. A total of 108 Holstein - Zebu dairy cows from six farms were randomly selected and divided into three groups according to their production phase at the time: PP group (0 to 4 weeks antepartum; n = 30 animals); L4 group (0-4 weeks postpartum; n = 15 animals); L + 5 group (5-14 weeks postpartum; n = 63 animals). Correlation and regression analysis were used to describe the relationship between the BCS, BFT and body weight (BW) variables. For productive and metabolic evaluation of the animals we made a multivariate cluster analysis to order the distribution of these animals in homogeneous BFT groups within each study phase. Analysis of variance showed significant differences (P |
| Databáze: | OpenAIRE |
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