Analysis of the relationship between energy balance and properties of rumen fermentation of primiparous dairy cows during the perinatal period.
Anim Sci J
; 95(1): e13988, 2024.
Article
em En
| MEDLINE
| ID: mdl-39165081
ABSTRACT
Short-chain fatty acids (SCFAs) produced in the rumen are key factors affecting dairy cows' energy balance (EB). This study aimed to quantitatively evaluate the effects of SCFAs production on EB in dairy cows. Primiparous dairy cows were divided into high non-esterified fatty acid (NEFA; group H) and low NEFA (group L) groups based on their blood NEFA levels at week 3 postpartum, which served as an indicator of EB. The amounts of SCFAs produced in the rumen, including acetate, propionate, and butyrate (SCFAsP), were calculated using the predicted rumen volume. Because there were no differences between the groups in SCFAsP/dry matter intake, whereas 4% fat-corrected milk (FCM)/SCFAsP was significantly higher in group H, it was suggested that more body fat was mobilized for milk production in group H. However, group L, which showed better EB, had propionate dominant and lower FCM/SCFAsP and milk energy/SCFAs energy at 3 and 7 weeks postpartum, indicating that group L had a better energy supply for milk production. These results suggest that SCFAsP produced by rumen fermentation and the composition of SCFAs in the rumen affect milk production and EB.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Rúmen
/
Lactação
/
Leite
/
Metabolismo Energético
/
Ácidos Graxos não Esterificados
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Ácidos Graxos Voláteis
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Fermentação
Limite:
Animals
/
Pregnancy
Idioma:
En
Revista:
Anim Sci J
Ano de publicação:
2024
Tipo de documento:
Article