EFFECT OF BOVINE SOMATOTROPIN ON THE GROWTH-RATE, HORMONE PROFILES AND CARCASS COMPOSITION OF HOLSTEIN BULL CALVES

被引：35
|
作者：
GROENEWEGEN, PP
MCBRIDE, BW
BURTON, JH
ELSASSER, TH
机构：
[1] UNIV GUELPH,DEPT ANIM & POULTRY SCI,GUELPH N1G 2W1,ONTARIO,CANADA
[2] USDA ARS,BELTSVILLE AGR RES CTR,BELTSVILLE,MD 20705
来源：
DOMESTIC ANIMAL ENDOCRINOLOGY | 1990年 / 7卷 / 01期
关键词：
D O I：
10.1016/0739-7240(90)90053-3
中图分类号：
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号：
0905 ;
摘要：
A study was conducted to determine the effects of BST on the growth rate, hormone profiles and carcass composition of preweaned Holstein bull calves. Injection of BST resulted in increased average daily gains and feed intakes (P<.05) compared to that of control animals. This increased rate of gain coupled with increased intakes resulted in identical feed conversion efficiencies between treatments. Fractional weights (organ weight/body weight) of selected organs and tissues were unaffected by BST treatment. Carcass fat percentage was reduced in BST-treated calves (28.1 ± 1.18% and 32.8 ± 1.84% for BST and controls groups respectively, P<.05) while no differences were seen for carcass DM, CP, ash or gross energy content. Plasma BST levels were higher (P<.0001) in BST treated calves while plasma IGF-1 levels were not different between treatments. Plasma IGF-1 concentrations correlated (P<.0001, R = .71) with average daily gains. The results of this trial suggest that growth responses are inducible with BST in young calves (7 days to 3 months). © 1990.
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页码：43 / 54
页数：12
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