In order to study and analyze the effects of different levels of methionine chromium on growth,immune biochemical indicators,and immune indicators in finishing pigs.In this experiment,healthy individuals with similar age,physical condition,and weight(100±2.0 kg)were selected as 200"Du×long×large"three way hybrid fattening pigs were randomly divided into 4 groups,with 10 replicates per group and every 5"pigs×long×large"ternary hybrid fattening pigs were divided into a repeating group,and the groups were supplemented with 0,0.3,0.5,and 0.7 mg/kg methionine chromium(in the form of chromium)in the basic diet.The preexperiment lasted for 7 days and the experimental period was 56 days.The results showed that:(1)The average daily gain of group 3 and group 4 fattening pigs was significantly increased by 13.5%and 12.2%(P＜0.05)compared to group 1,respectively,and their feed weight was significantly reduced by 8.7%and 7.3%(P＜0.05)compared to group 1;(2)The TP content in the serum of group 3 and 4 finishing pigs was significantly increased by 16.4%and 16.1%compared to group 1(P＜0.05),and the AST,TC,and BUN content in the serum was significantly reduced by 17.8%,18.4%,12.4%,12.8%,13.3%,and 11.3%compared to group 1(P＜0.05);(3)The levels of IgG,IL-2,and CSFV antibody in the serum of group 3 and 4 finishing pigs were significantly increased by 10.5%,12.3%,14.8%,22.9%,18.0%,and 15.6%compared to group 1,respectively(P＜0.05).In summary,the addition of different levels of methionine chromium can improve the growth performance of fattening pigs,improve blood biochemical indicators,and enhance their immunity.The application effect of adding 0.5 mg/kg methionine chromium to the basic concentrate is good.
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