Dillo Gubil Bekele, Tolemariam Taye, Amejo Asrat Guja
Department of Animal Science, College of Agriculture and Veterinary Medicine Jimma University Jimma Ethiopia.
Department of Animal Science, College of Agriculture Sciences Arba Minch University Arba Minch Ethiopia.
Food Sci Nutr. 2024 Apr 8;12(7):5065-5076. doi: 10.1002/fsn3.4156. eCollection 2024 Jul.
With a growing export and local market, sheep farming is critical to the economy of smallholder farmers; however, indigenous sheep breeds usually exhibit low carcass output and live weight due to nutritional constraints. The study aimed to investigate the impact of supplementing local sheep with dawri-damaa leaf meal (DDLM) on their performance, carcass characteristics, and profitability when fed native grass hay. The research used a randomized complete block design (RCBD) to administer four feeding treatments (T1, T2, T3, and T4 at 0%, 30%, 50%, and 70% DDLM, respectively) to 20 local uncastrated male lambs having an average 23.72 ± 0.73 kg body weight and average age of 11.72 ± 0.74 months. Greater doses of DDLM in the diet resulted in greater average daily gain (ADG) of 51.4-83.8 g/day and feed conversion efficiency (FCE) of 0.066-0.089 in lambs, compared to 15.0 g/day ADG and 0.025 FCE in lambs under control diet (T1). Additionally, the lambs had increased slaughter body weight (SBW), empty body weight (EBW), and hot carcass weight (HCW) in T4 and T3 compared to other treatments ( < .05). There were no significant differences in dressing percentages (DPs) across any treatment group. The study also discussed the economic viability of supplementing with DDLM, suggesting that feeding 70% daily dry matter of DDLM at 2.5% live weight might be beneficial depending on availability, access, and cost factors. In conclusion, feeding DDLM up to 70% has improved the performance of sheep and is economically feasible. Further research might be required to discover whether such levels of inclusion are harmful and apply different processing methods for feeding animals.
随着出口和本地市场的不断增长，养羊业对小农户的经济至关重要；然而，由于营养限制，本地绵羊品种通常胴体产量和活重较低。本研究旨在调查用达维-达马叶粉（DDLM）补充本地绵羊对其在饲喂天然禾本科干草时的生产性能、胴体特性和盈利能力的影响。该研究采用随机完全区组设计（RCBD），对20只平均体重23.72±0.73千克、平均年龄11.72±0.74个月的本地未阉割雄性羔羊进行四种饲养处理（T1、T2、T3和T4，分别为0%、30%、50%和70%的DDLM）。与对照日粮（T1）组羔羊平均日增重（ADG）15.0克/天和饲料转化率（FCE）0.025相比，日粮中较高剂量的DDLM使羔羊的平均日增重提高到51.4 - 83.8克/天，饲料转化率提高到0.066 - 0.089。此外，与其他处理相比，T4和T3组羔羊的屠宰体重（SBW）、空体重（EBW）和热胴体重（HCW）有所增加（P＜0.05）。各处理组的屠宰率（DPs）没有显著差异。该研究还讨论了补充DDLM的经济可行性，表明根据可获得性、获取途径和成本因素，以活重的2.5%每日饲喂70%的DDLM干物质可能是有益的。总之，饲喂高达70%的DDLM可提高绵羊的生产性能且在经济上可行。可能需要进一步研究以发现如此高的添加水平是否有害，并应用不同的加工方法来饲喂动物。
