氨化小麦秸在阉牛生长育肥期的利用与效益分析

The Use of Ammoniated Wheat Straw in Growing and Finishing Cattle Diets

选用24头乌珠穆沁品种生长期阉牛,进行连续90天的饲喂氨化与未氨化小麦秸的对比生长试验,结果表明。在阉牛生长育肥阶段,采用精料比例连续递进(40％→60％→80％)的饲养制度时,饲喂氨化麦秸较未氨化麦秸可使阉牛日粮干物质进食量(DMI)平均提高18％,日增重(ADG)平均提高34％,日粮精料转化效率(C/G)平均提高12.8％,每公斤增重的饲料费用(FC/G)平均降低0.16元.其中,在40％、60％和和80％精料比例下,饲喂氨化麦秸可使阉牛日粮DMI分别提高45.3％、19.1％和2.3％;ADG分别提高111.1％、39.1％和5.8％;C/G分别改进30.2％、11.4％和2.9％FC/G分别降低0.41、0.19和0.03元。在40％—80％精料比例范围内,给阉牛饲喂氨化秸可以提高动物的生产性能,但其提高幅度随日粮精料水平提高而下降。

A cattle prnduction trial was carried out with 24 young mongolia steers fed either ammonia-treated or untreated wheat straw at 40%, 60% or 80% dietary concentrate level in three consecutive periods over a total of 90 days.Ammonia treatment improved the animal performance that was expressed by dietary dry matter intake, daily gain, concentrate conversion efficiency and feed cost per unit of gain.The improved magnitude of the animal performance owing to ammoniation, however,decreased as levels of concentrate was increased in the diets.