水产学报2018，Vol.42Issue(7)：1111-1123,13.DOI:10.11964/jfc.20170610855
四种锌源对珍珠龙胆幼鱼生长性能、抗氧化能力以及矿物元素沉积的影响
Effects of four forms of zinc on growth performance,antioxidant capacity and vertebrae mineral accumulation of juvenile hybrid grouper(Epinephelus fuscoguttatus♀×E.lanceolatu)♂
摘要
Abstract
This study was to investigate the effects of four forms of zinc on growth performance, antioxidant capa-city, intestinal performance and vertebrae mineral accumulation of juvenile hybrid grouper (Epinephelus fuscogut-tatus♀×E. lanceolatu♂). The experimental diets were isonitrogenous and isolipidic diets by adding zinc sulfate (ZnSO4), basic zinc sulfate [Zn4(OH)6SO4], zinc glycine (Zn-Gly) and zinc hydroxymethionine (Zn-MHA), re-spectively. The zinc content of the four diets was 118.85, 116.92, 120.66 and 119.23 mg/kg, respectively. Three hundred and sixty individuals of grouper [initial average weight (11±0.12) g] were randomly divided into four groups with three replicates at a stock density of thirty, and fed with test diets for 8 weeks. The results showed that the weight gain rate and specific growth rate in Zn4(OH)6SO4, Zn-Gly and Zn-MHA groups were significantly higher than those in ZnSO4group. The feed coefficient rate of fish fed Zn4(OH)6SO4, Zn-Gly and Zn-MHA groups were significantly lower than that fed ZnSO4group. The survival rate was no different among the four groups. Hepatic malonaldehyde contents in Zn-Gly and Zn-MHA groups were significantly decreased compared with ZnSO4and Zn4(OH)6SO4groups. The activity of copper-zinc superoxide dismutase in the liver of fish fed with Zn-MHA was significantly higher than that in other groups. Compared to ZnSO4group, plica heights of foregut and midgut of fish fed with Zn4(OH)6SO4, Zn-Gly and Zn-MHA were significantly increased. The muscle thickness of hindgut in the Zn-Gly and Zn-MHA groups was significantly higher than that in ZnSO4and Zn4(OH)6SO4groups. Vertebrae iron and manganese contents in fish fed with Zn-Gly were significantly higher than those in ZnSO4 group. According to weight gain rate and hepatic copper-zinc superoxide dismutase contents, the relative bioavail-ability values of Zn4(OH)6SO4, Zn-Gly and Zn-MHA, compared to ZnSO4, were 119.15% and 110.90%, 118.43% and 113.58%, 122.45% and 130.84%, respectively. In conclusion, in the aspects of growth performance, activity of hepatic SOD and the iron accumulation in the vertebrae, Zn4(OH)6SO4is better than ZnSO4. However, Zn-Gly or Zn-MHA as organic form of zinc can impove growth performance, oxidation resistance, and intestine develop-ment compared to ZnSO4.关键词
珍珠龙胆/锌源/生长性能/抗氧化能力/肠道/矿物元素沉积/相对生物学效价Key words
Epinephelus fuscoguttatus♀×E.lanceolatu♂/zinc sources/growth performance/antioxidant capacity/intestine/mineral accumulation/relative bioavailability values分类
农业科技引用本文复制引用
殷彬,章双,林仪彤,迟淑艳,谭北平,姚红梅,姚亚军,董晓慧,杨奇慧,刘泓宇..四种锌源对珍珠龙胆幼鱼生长性能、抗氧化能力以及矿物元素沉积的影响[J].水产学报,2018,42(7):1111-1123,13.基金项目
农业部现代农业产业技术体系专项(CARS-47) （CARS-47）
广东省科技计划项目公益研究与能力建设专项(2016A020206006) （2016A020206006）
