Jaapar Mimi Syazwani, Chung Eric Lim Teik, Nayan Nazri, Muniandy Kalai Vaani, Hamdan Muhammad Hazziq Mohd, Jusoh Shokri, Jesse Faez Firdaus Abdullah
Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
Trop Life Sci Res. 2023 Mar;34(1):67-83. doi: 10.21315/tlsr2023.34.1.5. Epub 2023 Mar 31.
Limited data are available regarding the effects of on sheep's growth performance at different times. Therefore, this current study focused on sheep's nutrient apparent digestibility, feed efficiency, body index, and growth hormone when they are fed with low and high levels of diets. A total of 30 six-month-old male Dorper cross sheep were divided randomly into three treatment groups with 10 sheep per treatment. Treatment 1 (control) sheep were fed with and pellets as the basal diet, whereas Treatment 2 and 3 sheep were fed with feed mixed with low (10%) and high (60%) levels of , respectively. The study was conducted in two phases consisting of short-term feeding (seven days) and long-term feeding (90 days). Throughout the experiment, daily fecal voided were collected in the morning for seven days continuous before the end of each feeding phases for the determination of nutrient apparent digestibility. The amount of feed offered and refusals plus body weight gain were recorded daily to determine the feed efficiency (FE). Besides, the body measurements of each sheep from every treatment were measured weekly and blood samples were collected for the analysis of growth hormone (GH) concentration. There were significant differences ( < 0.05) in the nutrient apparent digestibility, growth performance, body measurement, and GH concentration among treatment sheep throughout the study period. Treatment 3 sheep fed with 60% of diet revealed the lowest dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), and acid detergent fiber (ADF) digestibility during the long-term feeding. Likewise, Treatment 3 (T3) sheep had the lowest total bodyweight gain, average daily gain, total feed intake, and daily feed intake among treatment sheep. The heart girth index (HGI) of T3 sheep was also significantly lower during the short-term feeding. Moreover, the GH concentration of T3 sheep was significantly lower as compared to the control that decreases steadily throughout the study period. In conclusion, high levels of showed the most significant results out of all three treatments indicating the presence of saponins, which produce negative effects on the sheep's overall performance.
关于[具体物质]在不同时期对绵羊生长性能的影响，现有数据有限。因此，本研究聚焦于绵羊在饲喂低水平和高水平[具体物质]日粮时的养分表观消化率、饲料效率、体指数和生长激素。总共30只6月龄雄性杜泊杂交绵羊被随机分为三个处理组，每组10只羊。处理1（对照组）的绵羊饲喂[具体物质]和颗粒料作为基础日粮，而处理2和3的绵羊分别饲喂添加低水平（10%）和高水平（60%）[具体物质]的混合饲料。该研究分两个阶段进行，包括短期饲喂（7天）和长期饲喂（90天）。在整个实验过程中，在每个饲喂阶段结束前连续7天每天早晨收集粪便，用于测定养分表观消化率。每天记录提供的饲料量、剩余饲料量以及体重增加量，以确定饲料效率（FE）。此外，每周测量每个处理组每只绵羊的体尺，并采集血样分析生长激素（GH）浓度。在整个研究期间，处理组绵羊在养分表观消化率、生长性能、体尺和GH浓度方面存在显著差异（P<0.05）。在长期饲喂期间，饲喂60%[具体物质]日粮的处理3绵羊的干物质（DM）、粗蛋白（CP）、中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）消化率最低。同样，处理3（T3）组绵羊在所有处理组中总体重增加、平均日增重、总采食量和日采食量最低。在短期饲喂期间，T3组绵羊的胸围指数（HGI）也显著较低。此外，与对照组相比，T3组绵羊的GH浓度显著较低，且在整个研究期间稳步下降。总之，在所有三个处理中，高水平的[具体物质]显示出最显著的结果，表明存在皂苷，这对绵羊的整体性能产生负面影响。
