动物营养学报2011，Vol.23Issue(10)：1725-1732,8.DOI:10.3969/j.issn.1006-267x.2011.10.012
卵形鲳鲹幼鱼的赖氨酸需求量
Dietary Lysine Requirements of Juvenile Pompano (Trachinotus ovatus)
摘要
Abstract
In order to study the lysine requirements of juvenile pompano ( Trachinotus ovatus) , six formulated diets with six levels (2.28% , 2.46% , 2.63% , 2. 73% , 2.95% or 3. 28% , respectively) of lysine fed juvenile T. Ovatus [ average initial body weight (14. 78 ±0.41) g] for 56 days. Fish were stocked in seawater floating net cages (1.0 mx1.O mxl.5 m) and fed twice daily (08:00 and 16:00) to apparent satiation. The results showed that weight gain ratio and specific growth rate increased with increasing dietary lysine levels, weight gain ratio (WGR) and specific growth rate (SGR) of fish fed diets containing 2.95% and 3.28% lysine were significantly higher than those of fish fed diets containing 2. 28% , 2. 46% and 2. 63% lysine (P <0. 05) , and the highest WGR and SGR were found in the group with the diet containing 2. 95% lysine (WGRmax =523.32% , SGRmax =3.26%/d), while no significant differences were found in WGR and SGR of fish fed diets containing 2.95% and 3. 28% lysine (P <0.05). Feed conversion ratio was firstly decreased and then increased with increasing dietary lysine levels, (P <0. 05) , the minimum value of feed conversion ratio was 1. 37 when the dietary lysine level was 2. 95%. No significant differences were found in nutrient composition of the whole body and muscle, and the contents of serum glucose (GLU), cholesterol (CHO) and triglyceride (TG) of juvenile T. Ovatus among all diet groups (P>0.05). Broken-line model regression analysis indicates that the optimum dietary lysine requirement for growth of T. Ovatus is 2. 94% of diet (DM basis) or 6.70% of dietary protein.关键词
卵形鲳鲹/赖氨酸/生长性能/血清生化指标/需求量Key words
Trachinotus ovatus/ lysine/ growth performance/ serum biochemical indices/ requirement分类
农业科技引用本文复制引用
杜强,林黑着,牛津,丁贤,黄忠,陈旭,陈义方..卵形鲳鲹幼鱼的赖氨酸需求量[J].动物营养学报,2011,23(10):1725-1732,8.基金项目
中央级公益性科研院所基本科研业务费专项资金项目(2008YD02) （2008YD02）
