Modeling nutrient fluxes and plasma ketone bodies in periparturient cows.
J Dairy Sci
; 91(11): 4282-92, 2008 Nov.
Article
en En
| MEDLINE
| ID: mdl-18946133
ABSTRACT
A mechanistic model was developed to study the interrelationship between glucose and lipid metabolism in periparturient cows. The driving variables were dry matter intake, feed composition, calf birth weight, milk production, and milk components. The response variables were body fat content and concentrations of plasma glucose, glycerol, nonesterified fatty acids (NEFA), and total ketone bodies (KB). Fetal growth and milk synthesis were assigned the highest priority for glucose demand in the model. The rate of fat mobilization was expressed as a function of glucose deficiency. The model assumed first-order kinetics for utilization of NEFA and KB. Model prediction errors were 19, 43, 48, and 36% of mean predictions for glucose, glycerol, NEFA, and KB, respectively. A linear bias was observed in KB and glycerol predictions. The model may be useful for understanding and explaining ketosis development.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Bovinos
/
Cuerpos Cetónicos
/
Fenómenos Fisiológicos Nutricionales de los Animales
/
Modelos Biológicos
Tipo de estudio:
Prognostic_studies
Límite:
Animals
/
Pregnancy
Idioma:
En
Revista:
J Dairy Sci
Año:
2008
Tipo del documento:
Article
País de afiliación:
Estados Unidos