Relação entre o biótipo de vacas Holando, a estratégia de alimentação e a saúde do úbere
DOI:
https://doi.org/10.31285/AGRO.27.1150Palavras-chave:
conformação da úbere, qualidade da leite, pastagemResumo
A genética e os sistemas de alimentação são fatores que afetam a incidência de mastite. Portanto, o objetivo deste estudo foi analisar a incidência de mastite clínica e a contagem de células somáticas (CCS) de vacas holandesas de dois biótipos, norte-americana (NA) e neozelandês (NZ), sob dois sistemas de alimentação (pastejo fixo ou máximo). Na Unidade Experimental do INIA La Estanzuela (Colonia, Uruguay) 120 vacas foram distribuídas em 4 tratamentos de acordo com a combinação de biótipo e alimentação (n = 30). O número de vacas com mastite clínica e a CSS foram registrados mensalmente durante uma lactação. Houve interação entre o biótipo e a paridade das vacas (P = 0,04) na frequência de mastite. Vacas primíparas NA apresentaram menor probabilidade de apresentarem mastite clínica (ODR: 0,003). Em contraste, as vacas multíparas NA tiveram a maior probabilidade de experimentar mastite clínica (ODR: 0,12), sendo as vacas de origem NZ os animais com valores intermédios (ODR primíparas: 0,082; ODR multíparas: 0,066). O sistema de alimentação não afetou a frequência de mastite ou CCS. O biótipo também não afetou a CCS. Em conclusão, independente do sistema de alimentação, a frequência de mastite foi diferente de acordo com o biótipo, mas essas diferenças foram influenciadas pela paridade dos animais. A CCS não foi afetada pelo sistema de alimentação ou biótipo animal.
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