桑树茎叶饲料对肉兔生产性能和肉品质的影响

本试验旨在研究桑树茎叶饲料对肉兔生产性能和肉品质的影响。采用单因素试验设计,选择35日龄健康、体重接近的新西兰肉兔144只,随机分为4组(每组6个重复,每个重复6只),分别饲喂桑树茎叶饲料添加量为0(对照组)、8%、16%、24%的试验饲粮。预试期为7 d,正试期为42 d。结果显示:24%组平均日增重显著低于对照组(P0.05)、料重比显著高于对照组(P0.05);16%、24%组背肌和腿肌45 min时的红绿度(a*)值和24 h时的p H显著高于对照组(P0.05);16%、24%组背肌和腿肌的滴水损失率显著低于对照组(P0.05);16%、24%组背肌和腿肌中肌苷酸含量显著高于对照组(P0.05);16%、24%组背肌中亚麻酸、腿肌中棕榈酸和亚麻酸含量显著高于对照组(P0.05)。由此得出,饲粮中桑树茎叶饲料的添加量不超过16%时对肉兔的生产性能无显著影响,同时能提高肌肉中风味物质的含量,改善肉品质。

Effects of Stem and Leaf Feed of Mulberry on Performance and Meat Quality of Meat Rabbits

The experiment was conducted to study the effects of stem and leaf feed of mulberry on performance and meat quality of meat rabbits.A total of 144 healthy 35-day-old New Zealand rabbits with the similar body weight were randomly divided into four groups, and each group had six replicates with six rabbits in each repli-cate.Rabbits in four groups were fed experimental diets which were supplemented with 0 ( control group), 8%, 16%and 24%stem and leaf feed of mulberry, respectively.The experiment was 7 days for adaptation and 42 days for trial period.The results showed as follows: the average daily gain in 24%group was signifi-cantly lower than that in control group ( P<0.05) , while the feed/gain in 24%group was significantly higher than that in control group ( P<0.05) .In addition, a* value at 24 h and pH at 45 min of back muscle and leg muscle were significantly higher than those in control group ( P<0.05 ) .The drip loss rate and inosinic acid content of back muscle and leg muscle in 16%and 24%groups were significantly lower and higher than those in control group ( P<0.05) , respectively.The contents of linolenic acid in back muscle and leg muscle and pal-mitic acid in leg muscle in 16%and 24%groups were significantly higher than those in control group ( P<0.05) .In conclusion, when the supplemental level of stem and leaf feed of mulberry less than 16%, there is no significant influence on the performance, but can increase the muscle flavor substance content, and then im-prove the meat quality of meat rabbits.