The effect of mulberry branch powder on the growth performance and skeletal muscle development of broiler chickens
The effect of mulberry branch powder on the growth performance and skeletal muscle development of broiler chickens.720 1-day-old Aba Yijia(AA)broiler chickens(average weight 45.8±1.29g)were randomly divided into 4 groups,with 6 replicates in each group and 30 chickens per replicate.They were fed in two stages of 1-3 weeks and 4-6 weeks,with 0%,1.5%,3.0%,and 6.0%mulberry branch powder added to the basic feed at each stage as the experimental feed.Compared with the control group,the final weight of broiler chickens in groups Ⅱ and Ⅲ significantly increased by 2.43%and 2.20%(P＜0.05),the average daily weight gain increased by 2.49%and 2.24%(P＜0.05),and the feed to meat ratio significantly decreased by 3.24%and 2.85%(P＜0.05).The mortality rates of broiler chickens in groups Ⅰ-Ⅲ decreased by 46.65%,39.23%,and 34.41%,respectively,compared with the control group(P＜0.05);In addition,each mulberry branch powder had no significant effect on the feed intake of broiler chickens(P＞0.05).In the third week,the chest and leg muscle rates of Group Ⅲ broiler chickens significantly increased(P＜0.05),and in the sixth week,the muscle rates of meat chicken legs in Groups Ⅱ and Ⅲ significantly increased(P＜0.05).In the third week,the expression of IGF-1R and mTOR genes in Ⅱ and Ⅲ chicken leg muscles was significantly upregulated(P＜0.05),and the expression of Pax7 gene in group Ⅲ was significantly upregulated(P＜0.05);In the 6th week,the expression of IGF-1R gene in Ⅱ and Ⅲ chicken leg muscles was significantly upregulated(P＜0.05),and the expression of m-TOR gene in group Ⅲ was significantly upregulated(P＜0.05).In addition,mulberry branch powder had no significant effect on the expression levels of MSTN,MuRF1,and MyoD genes in the leg muscles of broiler chickens at all stages(P＞0.05).(Experimental conclusion)Mulberry branch powder(6%)can improve the growth performance of broiler chickens and promote leg muscle development.
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