目的:进行实验以确定选定的埃塞俄比亚本地绵羊品种的日粮能量和蛋白质水平生长性能的影响。
方法:50只完整的公羊,每个品种25个,年龄为12个月,平均初始体重(IBW)为19.31±1.7kg,被用于这个实验。动物随机分为五种饮食处理,即,最低能量和蛋白质(mEMP),中等能量和蛋白质(MEMP),中能高蛋白(MEHP),高能量和中等蛋白质(HEMP),以及2*5阶乘排列的随机完全区组设计中的高能量和高蛋白(HEHP)饮食。最低限度,中等,高能量饮食分别为2.388、2.866和3.344Mcal/kg干物质(DM),相应的10%,16%,和20%的粗蛋白(CP)饮食,分别。日粮以麦麸(WB)的总混合日粮配制,玉米粒,花生饼,和牧场干草饲料成分。饮食报价为羔羊活重的3%,并根据获得的体重变化每两周进行一次修订。消化率试验进行了7天的实际粪便数据收集,随后是90天的喂养试验。
结果:饲喂MEHP饮食的动物具有最大的DM和营养素摄入量(CP和有机物)以及最佳的最终体重(FBW),总增益,增益率,平均每日收益,和饲料转化效率(31.3、12.9千克,41.2%,143.3gm,和23.13),其次是HEMP,HEHP,MEMP,和mEmP饮食。DM和营养素的消化率呈线性趋势(p<0.01)。Hararghe绵羊的FBW和总增重分别为4.3和3.1kg(p<0.01),养分利用率更高(22.57vs.18.18)与阿法尔羊(AS)相比。
结论:可以得出结论,MEHP和MEMP是绵羊品种的优良和最佳饮食,而Hararghe羊在大多数生长性能参数上都优于AS。
OBJECTIVE: The experiment was conducted to determine the effect of dietary energy and protein level growth performances of selected indigenous Ethiopian sheep breeds.
METHODS: Fifty intact ram lambs, 25 from each breed with 12 months of age and a mean initial body weight (IBW) of 19.31 ± 1.7 kg, were employed for this experiment. Animals were distributed randomly into five dietary treatments, i.e., minimum Energy and Protein (mEmP), medium energy and protein (MEMP), medium Energy and high Protein (MEHP), high energy and medium protein (HEMP), and high Energy and high Protein (HEHP) diets in randomized complete block design with 2 * 5 factorial arrangements. The minimum, medium, and high energy diets were 2.388, 2.866, and 3.344 Mcal/kg dry matter (DM) with the corresponding 10%, 16%, and 20% crude protein (CP) diets, respectively. The diets were formulated in a total mixed ration from wheat bran (WB), maize grain, peanut cake, and pasture hay feed ingredients. Diet offer was at the rate of 3% of lambs\' live weight and revised biweekly as per the attained body weight changes. Digestibility trial was conducted for 7 days of actual fecal data collection, followed by 90 days of feeding trial.
RESULTS: The animals fed on the MEHP diet had a maximum DM and nutrient intakes (CP and organic matter) and the best final body weight (FBW), total gain, gain rate, average daily gains, and feed conversion efficiency (31.3, 12.9 kg, 41.2%, 143.3 gm, and 23.13, respectively), followed by HEMP, HEHP, MEMP, and mEmP diets. Digestibility of DM and nutrients linearly followed similar trends (p < 0.01). Hararghe sheep was heavier (p < 0.01) by 4.3 and 3.1 kg in its FBW and total gain and more efficient in nutrients utilization (22.57 vs. 18.18) as compared to Afar sheep (AS).
CONCLUSIONS: It is concluded that MEHP and MEMP are superior and optimum diets for sheep breeds, and Hararghe sheep is carried out better than AS in most growth performance parameters.