额外添加复合维生素对育肥牛生长性能、屠宰性能和肉品质的影响OA北大核心CSTPCD

The purpose of this experiment was to investigate the effects of adding different fat-soluble vitamin additives to the diet on the growth performance,slaughter performance,and meat quality of finishing cattle.Twenty-four healthy Simmental hybrid cattle with similar age and weight of(502.87±14.25)kg were randomly divided into four groups with six replicates in each group and one cattle in each replicate.The control group was fed with basal diet,and the experiment group 1 was fed with 75 g/(head·d)of multivitamin Ⅰ(VA 9 000 IU,VD3 3 000 IU,VA 30 IU),experiment group 2 was supplemented with 83 g/(head·d)of multivitamin Ⅱ(VA 8 300 IU,VD3 2 490 IU,VA 24.9 IU),and experiment group 3 was supplemented with 98 g/(head·d)of multivitamin Ⅲ(VA 7 840 IU,VD3 1 960 IU,VA 19.6 IU).The pre-test period was 14 days,and the formal test period was 90 days.The results showed that the average daily gain of finishing cattle in the experimental groups increased by 2.91％,1.94％,and 1.94％,respectively compared to the control group(P＜0.05),and the backfat thickness increased by 10.97％,10.68％,and 9.37％,respectively compared to the control group(P＜0.05).Compared with the control group,the dripping loss of beef in the experimental groups decreased significantly(P＜0.05),the shear stress decreased by 14.11％,13.09％,and 13.85％,respectively(P＜0.05),and the L*and b*values of meat color increased significantly(P＜0.05).The serine content in the experimental groups was significantly higher than that in the control group(P＜0.05),while the cystine content was significantly lower than that in the control group(P＜0.05).The study indicates that adding multivitamins can improve the growth performance,slaughter performance,and meat quality of finishing cattle,and the combination of VA 120 IU/g,VD340 IU/g and VE 0.4 IU/g with 75 g/(head·d)has the better effect.