Saleem A M, Zanouny A I, Singer A M
Animal and Poultry Production Department, Faculty of Agriculture, South Valley University, Qena 83523, Egypt.
Animal and Poultry Production Department, Faculty of Agriculture, Minia University, Minia, Egypt.
Asian-Australas J Anim Sci. 2017 Apr;30(4):523-530. doi: 10.5713/ajas.16.0691. Epub 2016 Dec 17.
Two experiments were conducted to evaluate the effects on growth performance, digestibility, and blood metabolites of lambs during pre- and post-weaning period of inclusion of a commercial probiotic (PRO) containing a mixture of two strains of , (1×10 colony-forming unit [cfu]/g) and (1.3×10 cfu/g), with dextrose as the carrier compound compared to a diet based on concentrate mixture and wheat straw.
In exp. 1, 24 male lambs of about 15±2.6 d age and initial body weight (BW) of 5.52±0.6 kg were randomly allocated into three groups. One group received control diet without additives, and remainders received control diet supplemented with 0.5 or 1 g PRO/lamb/d. Daily feed intake and biweekly BW were recorded. In exp. 2, five lambs, (initial BW = 29.72±1.15 kg, age = 6.54±0.32 mo) were used as experimental animals in a digestion trial. They were fed the same diets as in Exp. 1.
The supplementation of PRO did not result in any significant differences in milk intake, average daily gain (ADG), or total gain between treatments during the pre-weaning period. Total dry matter intake tended to be greater (p = 0.07) with addition of PRO in the post-weaning diets. During post-weaning phase, the final BW, ADG, total gain, and feed conversion ratio of the lambs receiving PRO treatments tended to be greater (p≤0.10) than the control group. Addition of PRO in post-weaning diet decreased (p≤0.01) blood urea and cholesterol concentrations. With the exception of ether extract digestibility, all nutrients digestibility were improved with inclusion PRO in the post-weaning diets.
Lambs that received PRO in post-weaning diet appeared to show a better performance than lambs in pre-weaning period. Addition of the probiotic in the post-weaning diet trended towards improved dry matter intake, growth performance, feed conversion ratio, and nutrients digestibility.
进行两项试验，以评估在断奶前和断奶后期间，与基于精料混合料和小麦秸秆的日粮相比，添加含有两株 、 （1×10菌落形成单位[cfu]/克）和 （1.3×10 cfu/克）混合物的商业益生菌（PRO）且以葡萄糖为载体化合物对羔羊生长性能、消化率和血液代谢物的影响。
在试验1中，将24只约15±2.6日龄、初始体重（BW）为5.52±0.6千克的雄性羔羊随机分为三组。一组接受无添加剂的对照日粮，其余组接受每只羔羊每天补充0.5或1克PRO的对照日粮。记录每日采食量和每两周的体重。在试验2中，5只羔羊（初始体重 = 29.72±1.15千克，年龄 = 6.54±0.32月龄）用作消化试验的实验动物。它们饲喂与试验1相同的日粮。
在断奶前期间，添加PRO对各处理组的奶摄入量、平均日增重（ADG）或总增重没有显著差异。断奶后日粮中添加PRO使总干物质摄入量有增加趋势（p = 0.07）。在断奶后阶段，接受PRO处理的羔羊的最终体重、ADG、总增重和饲料转化率比对照组有增加趋势（p≤0.10）。断奶后日粮中添加PRO降低了（p≤0.01）血液尿素和胆固醇浓度。除乙醚提取物消化率外，断奶后日粮中添加PRO提高了所有营养物质的消化率。
断奶后日粮中添加PRO的羔羊似乎比断奶前的羔羊表现更好。断奶后日粮中添加益生菌有提高干物质摄入量、生长性能、饲料转化率和营养物质消化率的趋势。
