Postprandial blood glucose and insulin in cows fed high grain.
The effects of ration on postprandial serum glucose and insulin were detemined in 12 lactating Holstein cows. Six were fed a high grain ration of 15% hay and 85% concentrate (dry basis) and the other six a control ration of 55% corn silage, 10% hay and 35% concentrate. High grain feeding increased glucose and insulin at all hours postfeeding as compared to control cows. In the cows fed high grain, glucose increased from 63.3 to 72.2 mg/100 ml and insulin from 19.2 to 25.6 mu units/ml serum just before feeding to 3 h postfeeding. Values for 2, 3, and 4 h samples were greater than for other sampling time. Serum glucose was 55.5 mg/100 ml at 1 h in control cows which was above other sample. Serum insulin followed a pattern similar to glucose in controls but was not signigicantly different with time. The blood changes due to high grain feeding are probably related to low milk fat production.
D000821:Animal Feed; D000818:Animals; D001786:Blood Glucose / Q000032:analysis*; D002417:Cattle / Q000097:blood*; D002523:Edible Grain; D005260:Female; D007328:Insulin / Q000097:blood*; D007774:Lactation; D011247:Pregnancy; D012820:Silage; D013997:Time Factors
D001786:Blood Glucose; D007328:Insulin