饲粮中不同比例玉米皮对生长肉兔生长性能、血清生化指标、器官指数和肉质的影响

Effects of Different Proportions of Corn Bran in Diets on Growth Performance,Serum Biochemical Indexes,Organ Indexes and Meat Quality of Growing Rabbits

本试验旨在考察饲粮中不同比例玉米皮对生长肉兔生长性能、健康状况、血清生化指标、器官指数、屠宰性能和肉质的影响。选取150只体重[(719.80±45.66)g]相近、健康的35日龄断奶商品新西兰白兔(公母不限),随机分为5组,每组15个重复,每个重复2只。5组肉兔分别饲喂含0(C组,作为对照组)、5%(T1组)、10%(T2组)、15%(T3组)和20%(T4组)玉米皮的5种等能等氮等纤维饲粮。试验期为35 d。结果显示:1)生长性能和健康状况指标各组间均无显著差异(P>0.05),但T2、T3和T4组的平均日增重和料重比优于对照组;同时,T3和T4组均无动物死亡,死亡率低于其余3组。2)2个时间点(试验第15天和第36天)所测血清生化指标各组间均无显著差异(P>0.05)。3)除试验第15天的肾脏指数外,2个时间点各器官指数组间差异均不显著(P>0.05),试验第15天的肾脏指数随饲粮玉米皮比例的提高而增加,且T4组显著高于对照组和T1组(P<0.05)。4)屠宰性能以及除滴水损失外的其余肉质指标各组间差异不显著(P>0.05),T1和T4组的滴水损失低于对照组(P>0.05)及T2和T3组(P<0.05)。5)除T1组外,其余试验组的经济效益均高于对照组,尤其是T3组。总体而言,在本试验条件下,玉米皮可用作生长肉兔饲粮的原料,其适宜用量为占饲粮的15%。

This study aimed to determine the effects of different proportions of corn bran in diets on growth performance,health status,serum biochemical indexes,organ indexes,slaughter performance,meat quality and economic efficiency of growing rabbits.A total of 150 weaned New Zealand white rabbits(male or female)aged 35 days with similar body weight[(719.80±45.66)g]were randomly divided into 5 groups with 15 replicates per group and 2 rabbits per replicate.The rabbits in the 5 groups were fed 5 isoenergetic,isonitrogenous and isofibrous diets containing 0 corn bran(C group,as control group,),5%(T1 group),10%(T2 group),15%(T3 group)and 20%corn bran(T4 group),respectively.The experiment period was 35 days.The results showed as follows:1)there were no significant differences in the growth performance and health status indexes among groups(P>0.05),while the average daily gain(ADG)and feed/gain(F/G)of T2,T3 and T4 groups were better than that of the control group.Moreover,there was no animal died in T3 and T4 groups,and the mortality was lower than the other three groups.2)There were no significant differences in the serum biochemical indexes among groups on the 2 time points(day 15 and day 36 of the experiment)(P>0.05).3)There were no significant differences in the organ indexes(except for the kidney index on day 15)among groups on the 2 time points(P>0.05),the kidney index was increased with the increase of the corn bran proportions on day 15 of the experiment,and the T4 group was significantly higher than the control group and T1 group(P<0.05).4)There were no significant differences in the slaughter performance and meat quality indicators(except for the drip loss)among groups(P>0.05),and the drip loss of T1 and T4 groups was lower than that of the control group(P>0.05)and T2 and T3 groups(P<0.05).5)The economic efficiency of the test groups(except for T1 group)was higher than that of control group,especially T3 group.In general,under the condition of this experiment,corn bran can be used as feed ingredient for growing rabbits with the appropriate amount accounting for 15%of the diet.