蛋氨酸铬对母猪乳成分与泌乳相关激素及免疫指标的影响OA北大核心CSTPCD

In order to study the effects of chromium methionine on milk composition,lactation related hor-mones and immune indexes of lactating sows,eighteen healthy Duroc×landrace binary sows were random-ly divided into two groups(control group and experimental group).The control group was fed the basal di-et,and the experimental group was fed the basal diet supplemented with 5 g chromium methionine/t.The experiment began from the 7th day before delivery to the 21st day after delivery.Milk samples of sows were collected on the 1st,11th and 21st day after delivery.The contents of lactose,ash,non-fat total solids,pro-tein and fat in sow milk were detected.The contents of insulin(INS),prolactin(PRL),immunoglobulin A(IgA),immunoglobulin G(IgG)and immunoglobulin M(IgM)were determined.The results showed as follows:compared with the control group,the contents of lactose,non-fat solids,protein and fat in sow milk of experimental group were significantly increased at 21st day(P＜0.05),but there were no significant differences at other time points(P＞0.05).Chromium methionine had no effect on INS content in sow milk(P＞0.05),and PRL content in experimental group was significantly higher than that in control group at all time points(P＜0.05).The contents of IgA,IgG and IgM in experimental group were higher than those in control group at all time points(P＜0.05),except for no significant difference in IgG content on day 1(P＞0.05).The results indicated that adding chromium methionine to the basic diet could improve the con-tent of nutrients in sow milk.It also could increase the content of PRL in sow milk to enhance the lactation ability,and increase the content of IgA,IgG and IgM in milk to enhance the immunity of sows and piglets.