本试验旨在研究饲喂丙氨酰-谷氨酰胺(Ala-Gln)对哲罗鱼(Hucho taimen)仔鱼生长和抗氧化能力的影响。试验分6个组，每组3个重复，每重复1 000尾鱼。各组饵料分别在基础饵料基础上添加0(对照组)、0.125%、0.250%、0.500%、0.750%和1.000%的Ala-Gln。试验共进行8周。结果表明:与对照组相比，0.125%组对哲罗鱼仔鱼的生长未产生显著影响(P>0.05)；0.500%～1.000%组显著(P<0.05)或极显著(P<0.01)提高增重率和特定生长率；当添加量大于0.125%时，成活率显著(P<0.05)或极显著(P<0.01)提高；当添加量大于0.500%时，鱼体组织匀浆液中谷氨酰胺(Gln)含量显著升高(P<0.05)；0.750%和1.000%组鱼体组织匀浆液中谷氨酸(Glu)含量显著提高(P<0.05)；0.500%和0.750%组Na+, K+-ATPase活性显著升高(P<0.05)；各添加组SOD活性显著提高(P<0.05)，MDA含量显著(P<0.05)或极显著降低(P<0.01)；氨基酸含量无显著变化(P>0.05)。由此可知，添加Ala-Gln可提高哲罗鱼仔鱼的生长性能和抗氧化能力，适宜的添加水平为0.750%。

This experiment was conducted to study the effects of alanyl-glutamine (Ala-Gln) on growth and antioxidant capacity of Hucho taimen larva. Six experimental diets containing different level of Ala-Gln (with the levels of 0, 0.125%, 0.250%, 0.500%, 0.750% and 1.000%, respectively) were randomly assigned to 6 groups (with 3 replicates and 1 000 fish in each replicate) for 8 weeks. The results showed as follows: compared with the control group, the growth performance was not influenced by adding 0.125% Ala-Gln (P>0.05); weight gain rate (WGR) and specific growth rate (SGR) were increased significantly by adding 0.500%～1.000% Ala-Gln (P<0.05 or P<0.01) and survival rate was increased significantly by adding more than 0.125% Ala-Gln (P<0.05 or P<0.01); glutamine of fish body tissue fluid was increased by adding more than 0.500% Ala-Gln (P<0.05) and glutamic acid content was increased significantly by adding 0.750% and 1.000% Ala-Gln (P<0.05); Na+, K+-ATPase activity were increased by adding 0.500% and 0.750% Ala-Gln (P<0.05); superoxide dismutase (SOD) was increased (P<0.05) and malondialdehyde (MDA) was decreased significantly (P<0.05 or P<0.01), but amino acid content wasn’t influenced by adding Ala-Gln (P>0.05). It was concluded that the growth performance and antioxidant capacity of Hucho taimen larva could be improved by adding Ala-Gln, and the appropriate adding level of Ala-Gln was 0.750%.［Chinese Journal of Animal Nutrition, 2009，21(6):1012-1017］