Effects of supplementing different levels of concentrate on growth performance,slaughtering performance and meat quality of free range chicken under forest
In order to investigate the effects of supplementing different levels of concentrate on the growth performance,slaughter performance,and meat quality of ecological chickens under the forest,this experiment selected 80 chickens from a private farm in Yuncheng County,Heze City,Shandong Province,and randomly divided them into four groups,which were set as experimental group I,experimental group II,experimental group III and experimental group IV,and provided 30%,40%,50%and 60%concentrated feed respectively,and supplemented them every morning and evening.The experimental results showed that the final measured body weight,average daily gain,and average daily feed intake of ecological chickens in groups III and IV were significantly higher than those in group I(P＜0.05).The feed to meat ratio of ecological chickens in group IV was significantly lower than that of other groups(P＜0.05).The ecological carcass weight of groups Ⅲ and Ⅳ was significantly higher than that of group Ⅰ(P＜0.05),and the semi-eviscerated weight,full eviscerated weight,chest muscle weight and leg muscle weight had an increasing trend(P＞0.05).The slaughter rate of ecological chickens in experimental groups II,III,and IV was significantly higher than that in experimental group I(P＜0.05),and the evisceration rate of ecological chickens in groups Ⅰ and Ⅱ were significantly higher than those in group Ⅳ(P＜0.05),but there were no significant differences in semi-evisceration rate,breast muscle rate and leg muscle rate among the four groups(P＞0.05).The crude fat of ecological chicken muscle in groups Ⅲand Ⅳ was significantly higher than that in groups Ⅰ and Ⅱ,the crude ash,shear force and water loss rate of ecological chicken muscle in groups Ⅰ and Ⅱ were significantly higher than those in group Ⅳ(P＜0.05),and there was no significant difference in crude protein among all groups(P＞0.05).In summary,the results of this experiment show that in order to raise the ecological chickens in the experimental forest,it is necessary to supplement concentrate during the breeding process,and the proper proportion of concentrate supplement can improve the growth performance,slaughter performance and muscle quality of ecological chickens in the forest,and the effect is better when the proportion of concentrate supplement is 60%under the conditions of this experiment.
concentratefree range chicken under the forestgrowth performanceslaughtering performancemeat quality
万方数据
维普
