Schipper C, Church T, Harris B
Can Vet J. 1989 Sep;30(9):736-41.
Data from the Alberta Certified Preconditioned Feeder Program (1980-1987) were reviewed retrospectively. Numbers of calves sold, price premiums realized, pre-and postsale performance, production and health performance of preconditioned and regular calves were examined. During the study period, the program showed marked expansion and consistently resulted in substantial premiums for preconditioned calves. Real net returns from efficient rates of gain, increased sale weights, better calf quality and improved health status (disease resistance) were realized at sale time. Feedlot data indicated that postsale morbidity and mortality were markedly reduced in groups of preconditioned calves.
对艾伯塔省认证预处理育肥牛项目(1980 - 1987年)的数据进行了回顾性审查。研究了售出的犊牛数量、实现的价格溢价、售前和售后表现、预处理犊牛和常规犊牛的生产及健康表现。在研究期间,该项目显示出显著扩张,并持续为预处理犊牛带来可观的溢价。在销售时,通过高效的增重率、增加的销售体重、更好的犊牛质量和改善的健康状况(抗病能力)实现了实际净回报。饲养场数据表明,预处理犊牛组的售后发病率和死亡率显著降低。