中国海洋大学学报（自然科学版）2024，Vol.54Issue(9)：40-51,12.DOI:10.16441/j.cnki.hdxb.20220221
大菱鲆的赖氨酸最适需求量研究
Study on the Optimal Lysine Requirement of Turbot
摘要
Abstract
In order to optimize the lysine requirement of turbot(Scophthalmus maximus L.)and evaluate the effects of dietary lysine level on plasma biochemical indexes,digestive enzyme activity antioxidant and immune function of turbot,five isonitrogen(about 50％crude protein)and isolipid(about 12.5％crude fat)diets were designed in this study,of which the lysine contents were 1.69％,2.49％,3.32％,4.11％and 4.90％respectively,and fed for ten weeks.The results showed that when the dietary lysine content increased to 3.32％,the growth performance gradually improved,and then stabilized.Low dietary lysine content will adversely affect the feed utilization of turbot.With the increase of dietary lysine content from 1.69％to 4.90％,whole body lipid decreased and the protein increased.The liver body index(HSI)of fish also decreased with the increase of dietary lysine content.In terms of intestinal digestive enzyme activity,lipase and trypsin increased first and then decreased with the increase of dietary lysine content,reaching the highest level at 3.32％lysine.The addition of dietary lysine did not affect blood glucose content while plasma triglyceride(TG)content and total cholesterol(T-CHO)content increased significantly in 1.69％group and 2.49％group.In addition,the appropriate content of lysine can improve the antioxidant capacity of turbot liver and alleviate the inflammatory response by regulating nonspecific immunity.In this study,we found that when the dietary lysine content is about 3.19％of feed dry weight(6.39％of dietary protein),it can play its effective role to the greatest extent.关键词
赖氨酸/大菱鲆/饲料/生长代谢/消化吸收/免疫调节Key words
lysine/turbot/feed/growth metabolism/digestion and absorption/immune regulation分类
农业科技引用本文复制引用
黄薪睿,宋心鑫,王旋,刘成栋,周慧慧,麦康森,何艮..大菱鲆的赖氨酸最适需求量研究[J].中国海洋大学学报（自然科学版）,2024,54(9):40-51,12.基金项目
国家重点研究发展计划项目(2018YFD09000400,2019YFD09000200) （2018YFD09000400,2019YFD09000200）
山东省重点研究发展计划项目(2020ZLYS03) （2020ZLYS03）
国家海水鱼产业技术体系项目(CARS-47-G10)资助 Supported by the National Key Research and Development Program of China(2018YFD09000400,2019YFD09000200) （CARS-47-G10）
the Key Re-search and Development Program of Shandong(2020ZLYS03) （2020ZLYS03）
the Marine Fish Industry Technology System of China(CARS-47-G10) （CARS-47-G10）
