Shao Taoqi, Brattain Rebecca S, Shike Daniel W
Department of Animal Sciences, University of Illinois, Urbana, IL 61801, USA.
Animals (Basel). 2020 Nov 27;10(12):2226. doi: 10.3390/ani10122226.
The objective of this study was to investigate effects of maternal supplementation with an injectable trace mineral (Cu, Mn, Zn, and Se) on subsequent steer performance during the finishing phase. Seventy-six Angus cross steers (initial body weight 249 ± 41.5 kg) from dams administered either an injectable trace mineral (TM; Multimin 90) or sterilized physiological saline (CON) during prepartum stage were used. Individual feed intake during the finishing phase were recorded with GrowSafe feed bunks. Blood and liver biopsy samples were collected to evaluate trace mineral status. Steers were slaughtered at 413 ± 26 days of age and carcass data were obtained at a commercial abattoir. Growth performance or mineral status of the steers during the finishing phase was not affected ( ≥ 0.14) by maternal treatments. Carcass characteristics were not different ( ≥ 0.18), except steers from TM dams had greater ( = 0.05) percentage of carcasses graded as Choice or greater. In conclusion, maternal supplementation of an injectable trace mineral increased the percentage of carcasses graded as Choice or greater, other than that, maternal supplementation had limited influence on finishing phase growth performance, trace mineral status, or carcass characteristics of the subsequent steer progeny.
本研究的目的是调查产前阶段母体补充注射用微量元素（铜、锰、锌和硒）对后续育肥阶段阉牛性能的影响。使用了76头安格斯杂交阉牛（初始体重249±41.5千克），其母畜在产前阶段接受了注射用微量元素（TM；Multimin 90）或灭菌生理盐水（CON）。育肥阶段的个体采食量通过GrowSafe饲槽记录。采集血液和肝脏活检样本以评估微量元素状态。阉牛在413±26日龄时屠宰，并在一家商业屠宰场获取胴体数据。母体处理对育肥阶段阉牛的生长性能或矿物质状态没有影响（P≥0.14）。胴体特征没有差异（P≥0.18），但来自TM母畜的阉牛胴体评为精选级或更高等级的比例更高（P=0.05）。总之，母体补充注射用微量元素增加了评为精选级或更高等级的胴体比例，除此之外，母体补充对后续阉牛后代的育肥阶段生长性能、微量元素状态或胴体特征影响有限。
