肉牛断奶方法评价

J. Farney
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摘要

断奶对小牛来说是一件压力很大的事情。已经提出了各种管理方法来减少断奶应激。本研究的目的是评估三种不同的断奶管理方法对犊牛断奶增重的影响。在两个研究地点,88头公牛和小母牛被分配到三种断奶治疗中的一种。脱机管理选择是突然脱机、围栏脱机和使用鼻瓣脱机装置。犊牛在测量期开始时称重,断奶两周后称重。用鼻瓣法断奶的犊牛增重明显低于突然断奶或围栏断奶的犊牛。公牛在断奶期间也比小母牛长得多。一般来说,围栏断奶的小牛比突然断奶的小牛有更大的增重,但在这项研究中,小牛突然断奶,只从水坝移走几英里,我们没有看到在断奶事件中突然断奶和围栏之间的增重差异。在此期间,鼻瓣装置似乎导致犊牛增重较低,在确定最佳断奶管理实践之前,需要对该装置进行更多研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Weaning Method Evaluation for Beef Cattle
Summary Weaning is a stressful event for calves. Various management practices have been suggested to reduce weaning stress. The purpose of this study was to evaluate three different weaning management practices on calf gains at weaning. Eighty-eight bull and heifer calves were assigned to one of three weaning treatments at two research locations. The weaning management options were abrupt weaning, fence-line weaning, and use of a nose-flap weaning device. Calves were weighed at the start of the measurement period and then two weeks later after weaning was completed. Calves that were weaned using the nose-flap method had significantly lower gains than calves that were abruptly weaned or fence-line weaned. Bulls also gained more during this weaning period than heifers did. Generally, fence-line weaned calves have a greater gain than abruptly weaned calves, but in this study where the calves were abruptly weaned and only moved a few miles from the dams, we did not see a difference in gains during the weaning event between abrupt weaning and fence-line practices. The nose-flap device seemed to lead to a lower gain for calves during this period and more research on the device is needed before determining the best weaning management practice.
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