title: Some characteristics of nutrition metabolism and hormone control during the first 24 hours in neonatal calves.
abstract: 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.
authors.affiliation: College of Veterinary Medicine, Manking Agricultural University, China.
authors.forename: L
authors.initials: L
authors.lastname: Chen
authors.forename: X Z
authors.initials: XZ
authors.lastname: Mao
authors.forename: Z K
authors.initials: ZK
authors.lastname: Zhu
authors.forename: W L
authors.initials: WL
authors.lastname: Qin
authors.forename: S Y
authors.initials: SY
authors.lastname: Zhang
mesh_terms: 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
chemical_list: D001786:Blood Glucose; D005230:Fatty Acids, Nonesterified; D006728:Hormones