School of Agricultural Science, Faculty of Natural Sciences and Agriculture, North-West University, P. Bag X 2046, Mmabatho, 2735, South Africa.
Food Security and Safety Niche area, Faculty of Agriculture, Science and Technology, North-West University, P Bag X 2046, Mmabatho, 2735, South Africa.
Trop Anim Health Prod. 2024 Oct 3;56(8):323. doi: 10.1007/s11250-024-04149-x.
The study evaluated the effect of Vachellia erioloba leaf meal in diets containing ammoniated maize stove on growth performance, methane emission and heath of growing lambs. Thirty-two female lambs were allocated to the following four dietary treatments: total mixed ration (TMR, control), 20% inclusion of untreated maize stover (UMS), 20% inclusion of ammoniated maize stover (AMS), and combined inclusion of 10% ammoniated maize stover and 10% Vachellia erioloba leaves (AMSVL). Each treatment was replicated 8 times and a lamb in an individual pen was regarded as an experimental unit in a completely randomized design. Feed intake was higher (P < 0.05) in lambs fed the AMS and AMSVL diets compared to those fed UMS. Final body weights were higher in lambs fed the AMS and AMSVL diets. Both average daily gain (ADG) and feed convention ratio (FCR) were not affected by diet. In comparison with the AMS and AMSVL diets, the lambs fed the UMS diet had the highest (P < 0.05) methane emission. Overall, lambs fed the control diets had the lowest (P < 0.05) methane gas emission. Blood hematological values were affected by diet with the AMSVL fed lambs having the highest (P < 0.05) mean platelet volume (MPV) and procalcitonin (PCT) values. Furthermore, total albumin, amylase and total bilirubin were the highest (P < 0.05) in lambs fed on the AMSVL diet. Lambs fed on AMS diet had the highest (P < 0.05) serum urea levels. It can be concluded that combined inclusion of ammoniated maize stover and Vachellia leaves improved feed value and lamb performance when compared to the individual inclusion of both UMS and AMS.
本研究评估了在含氨化玉米秸秆的日粮中添加叶菜豆树叶粉对生长绵羊生长性能、甲烷排放和健康的影响。将 32 只雌性羔羊分配到以下四种日粮处理中：全混合日粮（TMR，对照）、20%未处理玉米秸秆（UMS）、20%氨化玉米秸秆（AMS）和 10%氨化玉米秸秆和 10%叶菜豆树叶（AMSVL）的组合添加。每种处理重复 8 次，每个单独的围栏中的一只羔羊被视为完全随机设计中的一个实验单位。与 UMS 组相比，饲喂 AMS 和 AMSVL 日粮的羔羊采食量更高（P<0.05）。饲喂 AMS 和 AMSVL 日粮的羔羊最终体重更高。平均日增重（ADG）和饲料转化率（FCR）不受日粮影响。与 AMS 和 AMSVL 日粮相比，饲喂 UMS 日粮的羔羊甲烷排放量最高（P<0.05）。总体而言，饲喂对照日粮的羔羊甲烷气体排放量最低（P<0.05）。血液血液学值受日粮影响，饲喂 AMSVL 的羔羊平均血小板体积（MPV）和降钙素原（PCT）值最高（P<0.05）。此外，总白蛋白、淀粉酶和总胆红素在饲喂 AMSVL 日粮的羔羊中最高（P<0.05）。饲喂 AMS 日粮的羔羊血清尿素水平最高（P<0.05）。综上所述，与单独添加 UMS 和 AMS 相比，同时添加氨化玉米秸秆和叶菜豆树叶可提高饲料价值和羔羊生产性能。
