低鱼粉饲料中添加牛磺酸对黄鳝生长、消化率及肠道酶活性的影响

Effects of dietary taurine supplementation in low fish meal feed on growth, digestibility, intestinal enzyme activities of rice field eel (Monopterus albus)

  • 摘要: 该研究对体质量为 (25.03±0.02) g 的健康黄鳝 (Monopterus albus) 进行了10 周的养殖实验,探究了低鱼粉饲料中添加牛磺酸对黄鳝生长、消化率及肠道酶活性的影响。实验设置了高鱼粉组 (42%, FM)、低鱼粉组 (22%, T0) 以及在低鱼粉饲料中分别添加0.2% (T0.2) 和0.5% (T0.5) 牛磺酸的4个处理组,每组5个重复。结果显示,与FM组相比,T0组黄鳝的增重率、蛋白质效率、干物质消化率和蛋白质消化率显著下降 (P<0.05),饲料系数显著上升 (P<0.05)。添加适量牛磺酸可显著提高黄鳝的增重率、蛋白质效率和干物质消化率,降低饲料系数 (P<0.05),但T0.5组黄鳝的增重率、蛋白质效率和饲料系数与T0组相比无显著性差异 (P>0.05)。此外,T0组肠道肌酸激酶 (CK)、钠钾ATP酶 (Na+-K+-ATPase)、碱性磷酸酶 (AKP)、胰蛋白酶 (TRYP) 和脂肪酶活性显著低于FM组 (P<0.05),T0.2组的上述肠道酶活性均显著升高 (P<0.05),T0.5组肠道Na+-K+-ATPase、AKP、TRYP和脂肪酶 (LPS) 活性虽高于T0组,但无显著性差异 (P>0.05)。综上,低鱼粉饲料中添加0.2%牛磺酸可提高黄鳝的生长,改善肠道消化吸收功能,但添加过量牛磺酸 (0.5%) 效果不明显。

     

    Abstract: In this study, the healthy rice field eels (Monopterus albus) with body mass of (25.03±0.02) g had been cultured for 10 weeks, and the effects of taurine on the growth, digestibility and intestinal enzyme activity of M. albus were studied. Four treatment groups with high-content fish meal (42%, FM), low-content fish meal (22%, T0) and low-content fish meal diet supplemented with 0.2% (T0.2) and 0.5% (T0.5) taurine were set up, with five replicates in each group. The results show that compared with FM group, the weight gain rate, protein efficiency ratio, dry matter digestibility and protein digestibility of rice field eels decreased in T0 group significantly (P<0.05), while the feed conversion ratio increased significantly (P<0.05). Adding an appropriate amount of taurine could increase the weight gain rate, protein efficiency ratio and dry matter digestibility of rice field eels, but reduce the feed coefficient (P<0.05). The weight gain rate, protein efficiency ratio and protein digestibility in T0.5 group were approximate the same in T0 group (P>0.05). Moreover, comparing with FM group, the intestinal creatine kinase, Na+-K+-ATPase, alkaline phosphatase, trypsin and lipase activities in T0 group decreased significantly (P<0.05), but the activities of the aforementioned intestinal enzyme in T0.2 group increased significantly (P<0.05). The activities of Na+-K+-ATPase, alkaline phosphatase, trypsin and lipase in T0.5 group were higher than those in T0 group, without significant difference (P>0.05). To sum up, 0.2% taurine supplementation in low-content fish meal feed can improve the growth performance, intestinal digestion and absorption function of rice field eel, but excess taurine (0.5%) has no obvious effect.

     

/

返回文章
返回