硒代蛋氨酸对黄鳝生长性能、 肌肉组织硒含量及血清生化指标的影响.

The experiment was conducted to investigate the effect of Se-Met supplementation on growth performance, selenium content in muscle tissue and serum biochemical indexes of Monopterus albus. Three hundred Monopterus albus with body weight of (27.55±0.85) g were randomly divided into five groups, with three replicates in each group and 20 Monopterus albus in each replicate. The Monopterus albus in control group were fed with basal diet, and Monopterus albus in SM1 group, SM2 group, SM3 group and SM4 group were fed with basal diet supplemented with 0.3, 0.6, 0.9 and 1.5 mg/kg Se-Met, respectively. The experiment lasted for 21 d. The results showed that compared with control group, the weight gain rate of Monopterus albus in SM2 group was significantly increased (P<0.05), and the feed coefficient was decreased (P<0.05). The content of selenium in muscle tissue of Monopterus albus in SM2 group, SM3 group and SM4 group was significantly higher than that in control group (P<0.05). The serum total cholesterol content of Monopterus albus in Se-Met groups was significantly higher than that in control group (P<0.05), the content of total cholesterol and high density lipoprotein cholesterol in SM2 group were the highest, and the content of low density lipoprotein cholesterol in SM4 group was significantly higher than that in other groups (P<0.05). The activity of serum alkaline phosphatase, glutamyltransferase, aspartate aminotransferase and alanine aminotransferase in Se-Met groups were higher than those in control group, and the activity of SM4 group was the highest. Serum IgM content of Monopterus albus in Se-Met supplemental groups was higher than that in control group. The experiment indicates that adding proper amount of Se-Met in diet can improve the growth performance, immune function and selenium content in muscle tissue of Monopterus albus, and the optimal supplemental level is 0.6 mg/kg. [ABSTRACT FROM AUTHOR]