| 饲料浮萍水平对黄金锦鲤生长性能、消化酶活力及抗氧化能力的影响 |
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| 引用本文： | 张植元,范泽,李静辉,杨天毅,魏东,乔秀亭,白东清.饲料浮萍水平对黄金锦鲤生长性能、消化酶活力及抗氧化能力的影响[J].大连海洋大学学报,2017,32(4). |
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| 作者姓名： | 张植元 范泽 李静辉 杨天毅 魏东 乔秀亭 白东清 |
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| 作者单位： | 天津农学院 水产学院, 天津市水产生态及养殖重点实验室, 天津300384 |
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| 基金项目： | 天津市科技重大专项与工程计划项目 |
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| 摘 要： | 为研究浮萍Lemna minor对黄金锦鲤Cyprinus carpio生长性能、抗氧化和消化能力的影响,以初始体质量为(52.99±1.95)g的黄金锦鲤为研究对象,在饲料中分别添加0、3%、6%、9%、13%、14%的浮萍,相应替代同等水平的菜粕,制成6组等氮(粗蛋白质为38.5%~38.6%)、等能(12.2 MJ/kg)的饲料,分别记为D1(对照)、D2、D3、D4、D5、D6饲料组,将540尾健康的黄金锦鲤随机分成6组,每组设3个重复,每个重复放30尾鱼,养殖时间为8周。结果表明:D6饲料组增重率(WGR)、蛋白质效率(PER)、特定生长率(SGR)和肥满度(CF)均显著高于对照组及添加水平为3%的饲料组(P0.05),而其饲料系数(FCR)显著低于上述两组(P0.05);D6饲料组蛋白酶活力与脂肪酶活力显著高于其他饲料组(P0.05),各饲料组间淀粉酶活力则无显著性差异(P0.05);D4与D6饲料组肝胰脏、脾脏、肾脏和血清中的超氧化物歧化酶(SOD)与过氧化氢酶(CAT)活力显著高于其他饲料组(P0.05),且D6饲料组丙二醛(MDA)活力显著最低(P0.05)。研究表明:本试验条件下,饲料中浮萍的添加水平在14%时,有利于黄金锦鲤的生长,并能提高鱼体抗氧化能力与消化酶活力。
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| 关 键 词： | 浮萍 黄金锦鲤 生长性能 消化酶活力 抗氧化能力 |
Effects of dietary duckweed levels on growth performance,digestive ability,and antioxidant ability in koi carp Cyprinus carpio |
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| Authors: | ZHANG Zhi-yuan FAN Ze LI Jing-hui YANG Tian-yi WEI Dong QIAO Xiu-ting BAI Dong-qing |
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| Abstract: | Koi carp Cyprinus carpio with initial body weight of (52. 99±1. 95)g was reared in net cages at a density of 30 fish per cage and fed six isonitrogenous (38. 5%-38. 6%, crude protein) and isocaloric (12. 2 MJ/kg) diets containing 0(control,D1), 3% (D2), 6% (D3), 9% (D4), 13 % (D5), and 14% (D6) dry duckweed meal replacing corresponding rapeseed meal at water temperature of (29. 0±1. 1)℃ or 8 weeks with triplication to evalu-ate the effects of dietary duckweed levels on growth, antioxidant ability, and digestive ability of koi carp. The re-sults showed that there were significantly higher weight gain rate( WGR) , specific growth rate( SGR) , protein effi-cient ratio( PER) and condition factor( CF) and significantly lower food conversion ratio ( FCR) in the fish in group D6 than those in the control group and in group D2 ( P<0 . 05 ) . The koi carp fed the diet containing 14% duck-weed had significantly higher activities of protease and lipase than the fish in other groups did(P<0. 05), without significant differences in amylase activity ( P>0 . 05 ) . There were significantly higher activities of superoxide dis-mutase( SOD) and catalase( CAT) in hepatopancreas, kidney, spleen and serum in the fish fed the diets containing 9% and 14% duckweed meal than those in the other groups ( P<0 . 05 ) , with significantly lower contents of malon-dialdehyde (MDA) in the fish fed the diets containing 14% duckweed (P<0. 05). The findings indicate that sup-plementation of 14% duckweed replacing corresponding rapeseed meal can improve the growth, and meet require-ments for antioxidant ability and digestive capacity of koi carp. |
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| Keywords: | duckweed koi carp growth digestion ability antioxidant ability |
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