Lee S J, Kim D H, Guan Le Luo, Ahn S K, Cho K W, Lee Sung S
Eco-friendly Biomaterial Research Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup 56212, Korea .
Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada .
Asian-Australas J Anim Sci. 2015 Dec;28(12):1729-35. doi: 10.5713/ajas.15.0290.
This study was conducted to evaluate the effect of medicinal plant by-products (MPB) supplementation to a total mixed ration (TMR) on growth, carcass characteristics and economic efficacy in the late fattening period of Hanwoo steers. Twenty seven steers (body weight [BW], 573±57 kg) were assigned to 3 treatment groups so that each treatment based on BW contained 9 animals. All groups received ad libitum TMR throughout the feeding trial until slaughter (from 24 to 30 months of age) and treatments were as follows: control, 1,000 g/kg TMR; treatment 1 (T1), 970 g/kg TMR and 30 g/kg MPB; treatment 2 (T2), 950 g/kg TMR and 50 g/kg MPB. Initial and final BW were not different among treatments. Resultant data were analyzed using general linear models of SAS. Average daily gain and feed efficiency were higher (p<0.05) for T1 than control, but there was no difference between control and T2. Plasma albumin showed low-, intermediate- and high-level (p<0.05) for control, T1 and T2, whereas non-esterified fatty acid was high-, intermediate- and high-level (p<0.05) for control, T1 and T2, respectively. Carcass weight, carcass rate, backfat thickness and rib eye muscle area were not affected by MPB supplementation, whereas quality and yield grades were highest (p<0.05) for T1 and T2, respectively. Daily feed costs were decreased by 0.5% and 0.8% and carcass prices were increased by 18.1% and 7.6% for T1 and T2 compared to control, resulting from substituting TMR with 30 and 50 g/kg MPB, respectively. In conclusion, the substituting TMR by 30 g/kg MPB may be a potential feed supplement approach to improve economic efficacy in the late fattening period of Hanwoo steers.
本研究旨在评估在韩牛育肥牛后期，将药用植物副产品（MPB）添加到全混合日粮（TMR）中对生长、胴体特性和经济效益的影响。将27头阉牛（体重[BW]，573±57千克）分配到3个处理组，使基于体重的每个处理组包含9头动物。在整个饲养试验期间，所有组自由采食TMR直至屠宰（24至30月龄），处理如下：对照组，1000克/千克TMR；处理1（T1），970克/千克TMR和30克/千克MPB；处理2（T2），950克/千克TMR和50克/千克MPB。各处理组的初始体重和最终体重无差异。使用SAS的一般线性模型分析所得数据。T1组的平均日增重和饲料效率高于对照组（p<0.05），但对照组和T2组之间无差异。对照组、T1组和T2组的血浆白蛋白呈低、中、高水平（p<0.05），而对照组、T1组和T2组的非酯化脂肪酸分别呈高、中、高水平（p<0.05）。添加MPB对胴体重、胴体率、背膘厚度和眼肌面积没有影响，而T1组和T2组的质量等级和产量等级分别最高（p<0.05）。与对照组相比，T1组和T2组分别用30克/千克和50克/千克MPB替代TMR，每日饲料成本分别降低了0.5%和0.8%，胴体价格分别提高了18.1%和7.6%。总之，用30克/千克MPB替代TMR可能是提高韩牛育肥牛后期经济效益的一种潜在饲料补充方法。
