饲粮不同生姜秸秆替代花生秧比例对莱芜黑兔生长性能、屠宰性能和肌肉品质的影响

Effects of Different Ratios of Ginger Straws Replacing Peanut Seedlings in Diets on Growth Performance,Slaughter Performance and Meat Quality of Laiwu Black Rabbits

本试验旨在研究饲粮不同生姜秸秆替代花生秧比例对莱芜黑兔生长性能、屠宰性能和肌肉品质的影响。试验选取45日龄育肥期莱芜黑兔160只,随机分为4组,饲喂分别以0(对照)、5%、10%和15%生姜秸秆粉替代花生秧粉的全价配合饲粮,每组5个重复,每个重复8只(公母各占1/2)。预试期7 d,正试期47 d。试验结束当天每个重复选取1只公兔和1只母兔屠宰,统计屠宰性能,同时采集背腰最长肌检测肌肉品质。结果表明:1)饲粮不同生姜秸秆替代花生秧比例对莱芜黑兔平均日增重无显著影响(P>0.05),对平均日采食量和料重比有显著影响(P<0.05);与对照组相比,15%替代组平均日采食量显著提高(P<0.05),料重比显著降低(P<0.05)。2)饲粮不同生姜秸秆替代花生秧比例对莱芜黑兔商业胴体重、半净膛胴体重和全净膛胴体重有显著影响(P<0.05),15%替代组的商业胴体重、半净膛胴体重和全净膛胴体重显著低于对照组(P<0.05)。3)饲粮不同生姜秸秆替代花生秧比例对莱芜黑兔肌肉肉色的红度(a*)和黄度(b*)值有显著影响(P<0.05),15%替代组的a*和b*值显著高于对照组(P<0.05)。4)饲粮不同生姜秸秆替代花生秧比例对莱芜黑兔肌肉中粗蛋白质、烟酸和α-生育酚含量有显著影响(P<0.05);与对照组相比,试验组肌肉中粗蛋白质、烟酸和α-生育酚含量均显著增加(P<0.05),分别在5%、10%和5%替代组达到最大值。综上所述,饲粮中生姜秸秆替代花生秧的适宜比例对莱芜黑兔的生长性能和肌肉品质无明显不良影响,且能提高肌肉营养价值。因此,生姜秸秆可用作家兔饲料原料,但由于生姜秸秆中酸性洗涤纤维含量偏高,使用比例不宜过高,以5%~10%为宜。

The experiment was conducted to investigate the effects of different ratios of ginger straws replacing peanut seedlings in diets on growth performance,slaughter performance and meat quality of Laiwu black rabbits.A total of 160 fattening Laiwu black rabbits at 45 days of age were randomly divided into 4 groups with 5 replicates in each group and each replicate contained 8 rabbits(half male and half female).Rabbits in 4 groups were fed 0(control),5%,10%and 15%ginger straws replacing peanut seedlings diets,respectively.The trial lasted for 7 days for adaptation,and 47 days for test.At the end of the experiment,one male rabbit and one female rabbit were slaughtered in each repetition,and slaughter performance was counted.Besides,the longissimus dorsi muscle was collected to detect muscle quality.The results showed as follows:1)different ratios of ginger straw replacing peanut seedlings had no significant effects on the average daily gain(ADG)(P>0.05),but had significant effects on the average daily feed intake(ADFI)and feed/gain(F/G)(P<0.05).Compared with the control group,the ADFI in 15%replacement group significantly increased(P<0.05),and the F/G significantly decreased(P<0.05).2)Different ratios of ginger straw replacing peanut seedlings had significant effects on commercial carcass weight,half-carcass weight and all-carcass weight of Laiwu black rabbits(P<0.05).The commercial carcass weight,half-carcass weight and all-carcass weight in 15%replacement group was significantly lower than those in the control group(P<0.05).3)Different ratios of ginger straw replacing peanut seedlings had significant effects on the redness(a*)and yellowness(b*)values of Laiwu black rabbits(P<0.05),and the a*and b*values in 15%replacement group were significantly higher than those in control group(P<0.05).4)Different ratios of ginger straw replacing peanut seedlings had significant effects on the contents of crude protein,nicotinic acid andα-tocopherol in muscle in Laiwu black rabbits(P<0.05).Compared with the control group,the contents of crude protein,nicotinic acid andα-tocopherol in the muscle of the experimental groups significantly increased(P<0.05),and reaching the maximum at 5%,10%and 5%substitution levels,respectively.Replacing peanut seedlings with optimum ratio ginger straws in diet has no obvious adverse effects on growth performance and meat quality of Laiwu black rabbits,and can increase nutritive value in muscle.Therefore,ginger straw can be used as rabbit’s feed raw material,but due to the high fiber content in ginger straw,the use ratio should not be too high,and it is suitable for use as 5%to 10%.