1Department of Animal and Poultry Production, Faculty of Agriculture,South Valley University,Qena 83523,Egypt.
2Animal and Poultry Production and Fish Department, Faculty of Agriculture and Natural Resources,Aswan University,Aswan,Egypt.
Animal. 2018 May;12(5):959-963. doi: 10.1017/S1751731117001793. Epub 2017 Jul 24.
Two experiments were conducted to evaluate the effects of replacing corn with an increasing concentration of high-purity glycerol (>99%) on growth performance, economical efficiency, blood constituents and nutrient digestibility of growing lambs. In experiment one, 24 male lambs (initial BW=33.6±6.0 kg; age=6.75±0.75 months) were randomly assigned to one of the three experimental treatments containing 0%, 5% or 10% glycerol to replace corn in concentrate. In experiment two, nine lambs (initial BW=44.7±2.2 kg, age=8.84±0.32 months) were used in a digestion trial with three treatments (three lambs per treatment) with glycerol replacing corn at 0%, 5% or 10% in the concentrate. Total dry matter (DM) intake decreased quadratically (P=0.003) with increasing concentration of glycerol in the diet. Lambs fed glycerol diets had greater average daily gain (P=0.005) and better feed efficiency (P=0.002) compared with the control. Feed costs were also reduced with glycerol inclusion. Glycerol supplementation did not affect serum concentrations of total protein, albumin, globulin, total lipid, cholesterol and glucose concentrations. Glycerol supplementation had no effect (P>0.05) on organic matter and CP digestion, but improved DM (P=0.0003), crude fiber (P=0.10), ether extract (P=0.0002) and nitrogen-free extract (P=0.05) digestion. In conclusion, glycerol can replace corn up to 10% of DM in the diets of growing lambs.
两项实验旨在评估用高纯度甘油（>99%）替代玉米对生长绵羊的生长性能、经济效益、血液成分和养分消化率的影响。在实验一中，将 24 只雄性羔羊（初始体重 33.6±6.0kg；年龄 6.75±0.75 个月）随机分配到含有 0%、5%或 10%甘油替代浓缩物中玉米的三个实验处理之一。在实验二中，9 只羔羊（初始体重 44.7±2.2kg，年龄 8.84±0.32 个月）用于消化试验，有三个处理（每个处理 3 只羊），在浓缩物中用甘油替代 0%、5%或 10%的玉米。随着日粮中甘油浓度的增加，总干物质（DM）摄入量呈二次方（P=0.003）下降。饲喂甘油日粮的羔羊比对照组具有更高的平均日增重（P=0.005）和更好的饲料效率（P=0.002）。添加甘油还降低了饲料成本。甘油补充剂对血清总蛋白、白蛋白、球蛋白、总脂、胆固醇和葡萄糖浓度没有影响。甘油补充剂对有机物和 CP 消化没有影响（P>0.05），但提高了 DM（P=0.0003）、粗饲料（P=0.10）、乙醚提取物（P=0.0002）和无氮提取物（P=0.05）的消化率。总之，甘油可以替代生长绵羊日粮中高达 10%的玉米。
