酶解羊毛粉代鱼粉补双蛋氨酸对大口黑鲈肝脏指标的影响

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关键词：大口黑鲈（Micropterussalmoides）；包膜蛋氨酸；氧化应激；脂质代谢中图分类号：X954；F326.4 文献标志码：A 文章编号：1004—6755（2025）08-0075—04

Abstract：To investigate the effects of supplementing crystalline methionine or coated methionine in diets where enzymatically hydrolyzed wool powder replaces fishmeal on hepatic biochemical parameters in Micropterus salmoides ，three experimental groups were established： the control groups （Do） contained 49% fishmeal，the second group （Dl） partial replacement of fishmeal with enzymatically hydrolyzed wool powder+crystalline methionine ，and the third group （D5） partial replacement of fishmeal with enzymatically hydrolyzed wool powder + coated methionine. Results showed ：compared to Do， the Dl group exhibited significantly reduced hepatic levels of total protein（TP），total antioxidant capacity（T-AOC），superoxide dismutase（SOD），and catalase（CAT）（ P<0. 001 ），alongside significantly elevated triglyceride（TG）and malondialdehyde（MDA）levels（ P<0， 01 ）.Nosignificant differences were observed in total cholesterol（T-CHO），glucose（GLU），alkaline phosphatase（AKP）， or acid phosphatase（ACP）（ P>0.05 .Compared to D1，the D5 group demonstrates significantly increased TP，T-AOC，SOD，and CAT levels （ P<0.001 ）with significantly decreased TG and MDA levels（ P<0 . 01）. Similarly，T- CHO，GLU，AKP，and ACP showed no significant changes （ P>0.05 . Conclusion，supplementation with coated methionine effectively alleviated oxidative stress and lipid metabolism disorders in Micropterus salmoides induced by partial replacement of fishmeal with enzymatically hydrolyzed wool powder.

Key words： Micropterus salmoides ; coated methionine; oxidative stress; lipid metabolism

大口黑鲈（Micropterussalmoides）对饮食蛋白有很高的要求（主要来自鱼肉），因为鱼类更喜欢利用氨基酸（AAS），而不是葡萄糖和脂肪酸，作为主要的代谢燃料[1]。（剩余6008字）