Nwachukwu Chinwe Uchechi, Aliyu Karimat Imam, Ewuola Emmanuel Olubisi
Department of Agricultural Science, School of Agriculture and Vocational Studies, Alvan Ikoku Federal College of Education, Owerri, Imo State, 460281, Nigeria.
Livestock Department, Ministry of Agriculture and Natural Resources, Kwara State, Nigeria.
Transl Anim Sci. 2021 Jun 30;5(3):txab096. doi: 10.1093/tas/txab096. eCollection 2021 Jul.
In a 12-week feeding trial, 32 rabbits (Chinchilla × New Zealand White; 56 days old; 691 ± 1 g body weight) were used to investigate the effect of pro- and prebiotics as growth enhancer on the growth performance, intestinal mucosal development, hematological and serum biochemical responses of rabbits. The dietary Biotronic® prebiotics and Biovet®-YC probiotics were added at 400 mg/kg and 50 mg/kg, respectively. The rabbits were housed individually and randomly assigned to four dietary treatments ( = 8/group; 50:50 bucks to does) including a control diet (diet 1), diet 2 (control + Biotronic® prebiotics), diet 3 (control + Biovet®-YC probiotics) and diet 4 (control + symbiotics [Biotronic® prebiotics and Biovet®-YC probiotics]). Body weight (BW), average daily gain (ADG), dry matter intake (DMI), and feed conversion ratio (FCR) were monitored. Five rabbits per treatment were used for organ assessment and intestinal histomorphology after feeding trial. Blood samples were collected for hematological and serum biochemical analysis. Results showed that supplementation of Biotronic® prebiotics and symbiotics in rabbit diet significantly ( < 0.05) increased final BW and ADG compared to Biovet®-YC probiotic and control diets. Kidney, lung, esophagus, gastro-intestinal tract, small and large intestines were significantly ( < 0.05) influenced by dietary treatments. Ileal mucosal assessment revealed that villus height (VH), villus width, villus density, crypt depth (CD), and VH:CD ratio of rabbits fed Biotronic® prebiotic and symbiotic diets were similar and significantly ( < 0.05) higher than those rabbits fed control and Biovet®-YC probiotic diets. Packed cell volume of rabbits fed symbiotic and control diets was significantly ( < 0.05) higher than those fed Biotronic® prebiotic and Biovet®-YC probiotic diets. This study suggests that Biotronic® prebiotics and its combination with Biovet®-YC probiotics are good alternative growth promoting feed additives in rabbit nutrition. They improved performance, intestinal development and blood profiles and aid feed digestion, nutrient absorption and utilization in rabbits.
在一项为期12周的饲养试验中，选用32只兔子（青紫蓝兔×新西兰白兔；56日龄；体重691±1克）来研究益生元和益生菌作为生长促进剂对兔子生长性能、肠道黏膜发育、血液学和血清生化反应的影响。日粮中分别添加400毫克/千克的百澳素®益生元和50毫克/千克的拜维易®-YC益生菌。兔子单独饲养，并随机分为四种日粮处理组（每组 = 8只；公母比例为50:50），包括对照日粮（日粮1）、日粮2（对照 + 百澳素®益生元）、日粮3（对照 + 拜维易®-YC益生菌）和日粮4（对照 + 合生元[百澳素®益生元和拜维易®-YC益生菌]）。监测体重（BW）、平均日增重（ADG）、干物质摄入量（DMI）和饲料转化率（FCR）。饲养试验结束后，每组选取5只兔子进行器官评估和肠道组织形态学观察。采集血样进行血液学和血清生化分析。结果表明，与拜维易®-YC益生菌日粮和对照日粮相比，在兔子日粮中添加百澳素®益生元和合生元显著（P < 0.05）提高了末体重和ADG。日粮处理对肾脏、肺、食管、胃肠道、小肠和大肠有显著（P < 0.05）影响。回肠黏膜评估显示，饲喂百澳素®益生元日粮和合生元日粮的兔子的绒毛高度（VH）、绒毛宽度、绒毛密度、隐窝深度（CD）以及VH:CD比值相近，且显著（P < 0.05）高于饲喂对照日粮和拜维易®-YC益生菌日粮的兔子。饲喂合生元日粮和对照日粮的兔子的红细胞压积显著（P < 0.05）高于饲喂百澳素®益生元日粮和拜维易®-YC益生菌日粮的兔子。本研究表明，百澳素®益生元及其与拜维易®-YC益生菌的组合是兔子营养中良好的促生长饲料添加剂替代品。它们改善了兔子的生长性能、肠道发育和血液指标，有助于饲料消化、营养物质吸收和利用。
