STABILITY OF PLASMA METABOLITES AND HORMONES IN LACTATING DAIRY-COWS

  • 1 January 1978
    • journal article
    • research article
    • Vol. 39  (6) , 949-952
Abstract
Plasma concentration stability of glucose, free fatty acids, ketone bodies, growth hormone and insulin were determined in lactating dairy cows. Concentrations of these metabolites and hormones were measured during a 36-48 h period in 3 normal, mature dairy cows in the 2nd mo. of lactation. Samples were taken at 30 min intervals, also, intensive sampling (every 10 min) was done at varying times in relation to feeding and milking. Of the 5 components measured, glucose concentration was the most stable, easiest to assay and most reliable for use as a diagnostic aid in assessing metabolic carbohydrate disturbances in dairy cattle.