胍基乙酸对育肥肉羊生长性能、血清免疫和肉品质的影响OA

To investigate the effects of Guanidinoacetic acid(GA)on growth performance,serum immunity,and meat quality in fattening sheep.72 healthy 3-month-old male Hu lambs were randomly divided into 4 groups(6 replicates×3 lambs per group).The control group was fed a basic diet,while the experimental groups(GA4,GA8,GA16)were fed a basic diet supplemented with 4,8,and 16 g/kg GA,respectively.The pre-trial lasted for 7 days,and the main trial lasted for 105 days.Results:Compared to the CON group,the final weight of sheep in the GA16 group was significantly increased by 4.37%(P<0.05),and the daily weight gain in the GA8 and GA16 groups was significantly increased by 4.10%and 9.26%,respectively(P<0.05).The feed-to-gain ratio was significantly decreased by 3.25%and 7.08%,respectively(P<0.05).The contents of TP and LZM in the GA16 group were significantly increased(P<0.05),and the contents of GLB,IgG,and IFN-γ in the GA8 and GA16 groups were significantly increased(P<0.05).The content of IL-6 in the GA4-GA16 groups was significantly decreased(P<0.05).The GR value,drip loss,and shear force in the GA8 and GA16 groups were significantly decreased(P<0.05),and the marbling score and pH24h were significantly increased(P<0.05).The eye muscle area and redness in the GA16 group were significantly increased(P<0.05).Conclusion:Guanidine acetic can enhance immunity and improve meat quality in sheep,and effectively promote weight gain.Based on various detection indicators,it is recommended to add GA at a concentration of 16 g/kg.