The effect of adding cellulase to feed on the growth performance,serum biochemical indicators,and meat quality of Kangxian Taiping chickens
The aim of this study is to investigate the effects of adding cellulase(CEL)to feed on the growth performance,serum biochemical indicators,and meat quality of Kangxian Taiping chickens.600 1-day-old male Taiping chickens from Kang County were randomly divided into 4 groups,each consisting of 10 replicates and a total of 150 chickens.The experiment was conducted in three stages:0～21 days,22～42 days,and 43～105 days.CEL at doses of 0,60,120,and 240 mg/kg was added to the basic diet of each stage as the experimental feed.The results showed that compared with the control group,the CEL groups at 120 and 240 mg/kg significantly increased the final weight of Taiping chickens by 4.74%and 4.95%,respectively(P＜0.05),significantly increased the average daily weight gain by 4.91%and 5.11%,respectively(P＜0.05),and significantly decreased the feed to meat ratio by 3.83%and 5.12%,respectively(P＜0.05).In addition,CEL had no significant effect on the feed intake of Taiping chickens(P＞0.05).The serum GLU and MDA levels of Taiping chickens in the CEL group at 240 mg/kg were significantly reduced(P＜0.05),and the T-SOD ability was significantly improved(P＜0.05).The serum GH and INS levels of Taiping chickens in the CEL groups at 120 and 240 mg/kg were significantly increased(P＜0.05).CEL had no significant effect on the serum TG,TC,IGF-I levels,ALT and AST activity of Taiping chickens(P＞0.05).The L * value and crude fat content of Taiping chicken breast muscle in the CEL group at 240 mg/kg were significantly increased(P＜0.05),and the shear force was significantly reduced(P＜0.05);The a* value of Taiping chicken breast muscle was significantly increased in the CEL groups at 120 and 240 mg/kg(P＜0.05).CEL had no significant effect on b* value,pH value,and crude protein content(P＞0.05).Conclusion:Adding cellulase can improve the growth performance and meat quality of Taiping chickens.Taking into account various detection indicators,the optimal dose is 240 mg/kg.
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