Effects of silage ryegrass on growth performance and meat quality of native chickens in late growth stage
The purpose of the experiment was to investigate the effects of supplementing different amounts of silage ryegrass on growth performance and meat quality of native chickens at the late growth stage.Sixty 132-day-old roosters were randomly divided into the control group,5％silage ryegrass supplementation group,10％silage ryegrass supplementation group,and 15％silage ryegrass supplementation group,with three replicates in each group and five chickens in each replicate.The control group was fed with complete formula diet(basic diet),while the other three groups were fed with basic diet+5％silage ryegrass,basic diet+10％silage ryegrass and basic diet+15％silage ryegrass,respectively.The trial period was 42 days.The results showed that the body weight of 15％silage ryegrass group was significantly lower than that of the control group(P＜0.05).The average daily gain of native chickens in each silage ryegrass group was extremely lower than that in the control group(P＜0.01),and the feed to weight ratio of native chickens in the 5％silage ryegrass group and 15％silage ryegrass group was significantly higher than that in the control group(P＜0.05).The inclusion of 10％silage ryegrass in the diet significantly increased the luminance(L*)of meat color of native chicken(P＜0.05),but had no significant effect on the redness(a*)and yellowness(b*)of meat color(P＞0.05).The dietary supplementation of silage ryegrass had no significant effect on muscle pH,tenderness,drip loss and intramuscular fat(P＞0.05),but the dietary supplementation of 10％and 15％silage tended to decrease decreased drip loss and increased tenderness and intramuscular fat content.The results showed that under the condition of limited feeding,supplementing bagged silage ryegrass to native chickens at the late growth stage would significantly reduce their growth performance,but it tended to improve meat quality.
NETL
NSTL
万方数据
维普
