饲粮中添加超氧化物歧化酶模拟物对肉仔鸡肌纤维特性及肌肉超氧化物歧化酶活性的影响

Effects of Dietary Superoxide Dismutase Simulant on Myofiber Characteristics and Muscle Superoxide Dismutase Activity of Broilers

本试验旨在研究饲粮中添加超氧化物歧化酶模拟物(SODm)对肉仔鸡肌纤维特性及肌肉超氧化物歧化酶(SOD)活性的影响。试验选取1日龄爱拔益加(AA)肉仔鸡360只,随机分为6组,每组6个重复,每个重复10只鸡。各组分别饲喂SODm水平为0(对照)、1.0‰、1.5‰、2.0‰、2.5‰、3.0‰的试验饲粮,试验期为42 d。结果表明,各组肉仔鸡生长性能指标无显著差异(P>0.05)。1.0‰SODm组肉仔鸡胸肌纤维密度显著高于其他各组(P<0.05),1.5‰SODm组肉仔鸡胸肌纤维直径显著高于除2.0‰SODm组外的其他各组(P<0.05)。1.5‰SODm组肉仔鸡腿肌肌纤维密度显著高于其他各组(P<0.05),1.5‰SODm组肉仔鸡腿肌肌纤维直径显著低于其他各组(P<0.05)。2.0‰SODm组肉仔鸡胸肌剪切力显著低于对照组(P<0.05)。3.0‰SODm组肉仔鸡胸肌SOD活性显著高于其他各组(P<0.05),1.5‰SODm组肉仔鸡腿肌SOD活性显著高于除3.0‰SODm组外的其他各组(P<0.05)。由此可知,饲粮中添加SODm可以改善肉仔鸡肌纤维特性,提高肌肉中SOD的活性,在一定程度上改善肉品质,同时增强肌肉的抗氧化能力。

The aim of this study was to investigate the effects of dietary superoxide dismutase simulant（ SODm） on myofiber characteristics and muscle superoxide dismutase（ SOD） activity of broilers. A total of360 one-day-old Arbor Acres（ AA） broilers were randomly divided into 6 groups with 6 replicates in each group and 10 chickens in each replicate. The broilers in 6 groups were fed the experimental diets with 0（ control）,1.0‰,1. 5‰,2. 0‰,2. 5‰ and 3. 0‰ SODm,respectively. The experimental period was 42 days.The results showed that there were no significant differences in growth performance indexes of broilers among all groups（ P0.05）. The breast muscle fiber density of broilers in 1.0‰ SODm group was significantly higher than that in other groups（ P0.05）,the breast muscle fiber diameter of broilers in 1.5‰ SODm group was significantly higher than that in other groups except 2.0‰ SODm group（ P0.05）. The leg muscle fiber density of broilers in 1.5‰ SODm group was significantly higher than that in other groups（ P0.05）,the leg muscle fiber diameter of broilers in 1. 5‰ SODm group was significantly lower than that in other groups（ P 0.05）. The leg muscle shear force of broilers in 2.0‰ SODm group was significantly lower than that in control group（ P0.05）. The breast muscle SOD activity of broilers in 3.0‰ SODm group was significantly higher than that in other groups（ P0.05）,the leg muscle SOD activity of broilers in 1.5‰ SODm group was significanly higher than that in other groups except 3.0‰ SODm group（ P0.05）. It is concluded that the addition of SODm in the diet can improve the myofiber characteristics of broilers,improve the muscle SOD activity,improve the meat quality to a certain extent,while enhance the muscle antioxidant ability.