Some characteristics of nutrition metabolism and hormone control during the first 24 hours in neonatal calves.
Six male Holstein calves of spontaneous delivery and with jugular vein catheter were chosen to study the characteristics of nutrition metabolism and hormone control during the first 24 h of age after birth. The results showed that plasma fructose (Fru) and lactic acid (LA) concentrations were highest at birth, fell significantly during the first 2 h of life, and then dropped further until 24 h. Glucose (Glu) increased at 0.5 h after birth, followed by a gradual decrease until 8 h, with a general upward trend thereafter. Free fatty acid (FFA) was very low at birth, rose rapidly within 2 h of live, and kept a relatively high concentration thereafter. Total protein (TP) had not obvious change and fluctuated at a low level during the first 24 h of age. The rise of insulin (Ins) at 1 h of age was observed, with a downward tendency thereafter. Plasma cortisol (Cort) level was high during 1 h of age and tend to drop thereafter. An obviously rising tendency of T4 and T3 was found during the first 4 h of life, followed by their keeping relatively high levels although decreasing constantly in neonatal calves.
Chen
L
L
College of Veterinary Medicine, Manking Agricultural University, China.
Mao
X Z
XZ
Zhu
Z K
ZK
Qin
W L
WL
Zhang
S Y
SY
D000818:Animals; D000831:Animals, Newborn / Q000097:blood*; D001786:Blood Glucose / Q000378:metabolism*; D002417:Cattle / Q000097:blood*; D005230:Fatty Acids, Nonesterified / Q000097:blood; D006728:Hormones / Q000097:blood*; D008297:Male
D001786:Blood Glucose; D005230:Fatty Acids, Nonesterified; D006728:Hormones