动物营养学报2019，Vol.31Issue(10)：4602-4611,10.DOI:10.3969／j.issn.1006⁃267x.2019.10.024
卵形鲳鲹( Trachinotus ovatus)对饲料中锌的需要量
Dietary Zinc Requirement of Juvenile Golden Pompano ( Trachinotus ovatus)
摘要
Abstract
This study was conducted to investigate the effects of dietary zinc contents on growth performance, body composition, antioxidant capacity and serum biochemical indexes of juvenile golden pompano ( Trachino?tus ovatus) , and to determine the zinc requirement of juvenile golden pompano. A total of 450 fish with an ini?tial body weight of (5.71±0.08) g were randomly assigned into 6 groups with 3 replicates per group and 25 fish per replicate. The fish were fed experimental diets with zinc sulfate monohydrate ( ZnSO4·H2O) as the zinc source for 8 weeks, which the dietary zinc contents were 38.1 ( not added zinc group), 47.8, 62.6, 73.2, 95.3 and 105.0 mg／kg, respectively. The results showed as follows: 1 ) the final body weight and weight gain rate of 62.6 to 105.0 mg／kg groups were significantly higher than those of not added zinc group ( P＜0.05) , and the feed conversion ratio of 62.6 to 105.0 mg／kg groups was significantly lower than that of not added zinc group ( P＜0.05). 2) The body crude ash content of fish of 47.8 to 105.0 mg／kg groups was significantly higher than that of not added zinc group ( P＜0.05 ). 3 ) The serum total antioxidant capacity ( T?AOC) of 62.6 to 105.0 mg／kg groups was significantly higher than that of not added zinc group ( P＜0.05) , and the serum superoxide dismutase ( SOD) activity of 62.6 to 105.0 mg／kg groups was significantly higher than that of not added zinc group and 47.8 mg／kg group ( P＜0.05 ). 4 ) The liver malondialdehyde ( MDA) content of 47.8 to 105.0 mg／kg groups was significantly lower than that of not added zinc group ( P＜0.05) , the liver copper, zinc?superoxide dismutase ( CuZn?SOD) activity of 62.6 to 105.0 mg／kg groups was significantly higher than that of not added zinc group and 47.8 mg／kg group ( P＜0.05) , and the liver catalase ( CAT) activity of 73.2 to 105.0 mg／kg groups was significantly higher than that of not added zinc group ( P＜0.05).5) The serum total protein ( TP) content of 73.2 mg／kg groups was significantly higher than that of not added zinc group ( P＜0.05) , the serum albumin ( ALB) content of 62.6 mg／kg group was significantly higher than that of not added zinc group and 105.0 mg／kg groups ( P＜0.05) , the serum alkaline phosphatase ( ALP) activity of 47.8 to 105.0 mg／kg group was significantly higher than that of not added zinc group ( P＜0.05) , the serum high density lipoprotein cholesterol ( HDL?C) content of 62.6 to 105.0 mg／kg group was significant?ly higher than that of not added zinc group and 47.8 mg／kg group ( P＜0.05). In conclusion, diets added zinc can improve the growth performance and serum biochemical indexes of juvenile golden pompano, and increase the body antioxidant capacity. Broken?line regression analysis based on the weight gain rate and liver CuZn?SOD activity indicate that the dietary zinc requirements for juvenile golden pompano are 57. 04 and 65.95 mg／kg, respectively.[ Chinese Journal of Animal Nutrition, 2019, 31(10) :4602?4611]关键词
卵形鲳鲹/锌/需要量/生长性能/抗氧化能力Key words
Trachinotus ovatus/zinc/requirement/growth performance/antioxidant capacity分类
农业科技引用本文复制引用
于万峰,林黑着,黄忠,周婷,虞为,周传朋,荀鹏伟,黄倩倩,黄小林..卵形鲳鲹( Trachinotus ovatus)对饲料中锌的需要量[J].动物营养学报,2019,31(10):4602-4611,10.基金项目
中国水产科学研究院南海水产研究所中央级公益性科研院所基本科研业务费专项资金项目( 2017ZD01) （ 2017ZD01）
国家自然科学基金项目(31602175) （31602175）
中国水产科学研究院基本科研业务费(2018HY⁃ZD0506) （2018HY⁃ZD0506）
