添加饲料枣或小麦对杂交肉牛育肥性能和成本的影响

Effect of Chinese Jujube or Wheat Supplementation on Fattening Performance and Cost of Simmental Crossbred Beef Cattle

选择40头体重相近[(365.60±49.33)kg]的周岁西门塔尔杂交肉牛,随机分为4个试验组,通过添加不同比例饲料枣或小麦的4组等同蛋白质和增重净能精补料,探讨添加饲料枣或小麦的精补料饲喂杂交肉牛的育肥性能和成本。140 d育肥试验的结果表明,饲喂30%小麦的精补料4和15%小麦的精补料3其杂交肉牛全期日增重分别为1.24 kg和1.22 kg,精料重比分别为4.22和4.28,增重耗精料成本占摄入成本分别为80.65%和81.97%;饲喂20%饲料枣的精补料2其杂交肉牛全期育肥性能和成本指标最差(P﹤0.05,P﹤0.01);饲喂10%饲料枣的精补料1其育肥指标与添加15%小麦的精补料3相同(P>0.05)。由此结论,在精补料蛋白质和增重净能相同条件下,添加30%小麦的精补料4明显提高杂交肉牛育肥性能、饲料效率和育肥利润空间;添加20%饲料枣的精补料2表现出最差育肥效果。

A trial was conducted to measure the effects of Chinese jujube or wheat on performance and cost per kilogram gain of fattening Simmental crossbred beef cattle under the same condition of dietary crude protein or net energy for gain( NEg). Forty Simmental crossbred yearling beef cattle( average BW = 365. 60 ±49. 33 kg) were divided into four groups and fed four diets with supplementing Chinese jujube or wheat. After140-day fattening period,the average daily gain was 1. 24 and 1. 22 kg respectively,and the ratio of feed to gain was 4. 22 and 4. 28 respectively after fed with Diet 4 containing 30% wheat and Diet 3 containing 15%wheat,respectively;the cost for weight gain was 80. 65% and 81. 97% of the total cost. The cross-bred beef cattle fed Diet 2 with 20% Chinese jujube had the worst results( P ﹤ 0. 05,P ﹤ 0. 01) and that fed Diet 1 with 10% Chinese jujube was similar to Diet 3( P ﹥ 0. 05). It was concluded that the cross-bred beef cattle fed Diet 4 with 30% wheat had significant increase in fattening performance,feed efficiency and the cost per kilogram gain under the conditions of feeding diets with same levels of both protein and NEg.