Comparação do uso do refratômetro Brix e do colostrômetro para estimar a qualidade do colostro em vacas leiteiras
Palavras-chave:
colostro, brix, colostrômetro, vacas leiteirasResumo
O colostro é a primeira secreção mamária e é a única maneira pela qual os bezerros adquirem imunidade
passiva. O objetivo deste estudo é determinar a correlação da qualidade do colostro de vacas leiteiras de
alta produção medida pelo colostrômetro e pela refratometria digital de graus Brix (°Bx). Foram colhidas
340 amostras de colostro do mesmo número de vacas e analisadas por colostrômetro e refratometria de
°Bx. Foi realizada uma regressão linear simples e o coeficiente de determinação (R²) foi determinado. Tudo
isso por meio do pacote estatístico SPSS 25.0. A média com o calostrômetro foi de 87,94±110, enquanto
com a refratometria Brix foi de 26,19±18, com um R2 0,706 com um valor de P<0.0001. Em conclusão, as
leituras de refratometria e o calostrômetro são métodos eficazes na determinação de imunoglobulinas. O
refratômetro Brix teve uma correlação aceitável, o que pode ser uma ferramenta fácil para verificar a
qualidade do colostro ao pé da vaca.
http://dx.doi.org/10.21929/abavet2024.5
e2021-82
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