Effect of laidlomycin propionate on beef bull growth performance and reproductive development

被引：1
|
作者：
Downs, KM [1 ]
Kunkle, WE [1 ]
Marshall, TT [1 ]
Reiling, BA [1 ]
Yelich, JV [1 ]
机构：
[1] Univ Florida, Dept Anim Sci, Gainesville, FL 32611 USA
来源：
JOURNAL OF APPLIED ANIMAL RESEARCH | 2000年 / 18卷 / 02期
关键词：
bulls; laidlomycin propionate; reproduction; performance; semen quality;
D O I：
10.1080/09712119.2000.9706335
中图分类号：
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号：
0905 ;
摘要：
The effects of laidlomycin. propionate (LP) on, beef bull growth performance and sexual development were determined in, all. 84 day study. Forty embryo transfer Angus bulls were fed three complete diets containing LP levels of either 0, 10 or 20 g/t. Bulls were fed daily using electronic feeders to obtain individual feed intake. Full weight and scrotal circumference (SC) were evaluated at 28 day intervals, Breeding soundness examinations were conducted to characterize semen. Muscle mass and body fat were estimated using real-time ultrasonography. Laidlomycin propionate did not influence daily gain, dry matter intake, feed efficiency, subcutaneous or intramuscular fat deposition, but Longissimmus muscle deposition was enhanced. Among treatments, bulls had similar (P>0.05) SC measurements and no detrimental effects on semen quality or sperm morphology were observed. Supplementing growing bulls with laidlomycin propionate for improved performance did not detrimentally affect sexual development.
引用
收藏
页码：137 / 147
页数：11
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