异育银鲫幼鱼对饲料中维生素K需求的研究
DIETARY VITAMIN K REQUIREMENT OF JUVENILE GIBEL CARP (CARASSIUS AURATUS GIBELIO)
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文摘
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以不同维生素K水平(0.13、2.15、3.25、6.40、12、17.20和23.20 mg/kg饲料)的7种精制饲料喂养初始体重约为(2.17±0.01) g的异育银鲫(Carassius auratus gibelio)10周,每个处理3个重复,研究异育银鲫对维生素K的需求量。结果显示:饲料中维生素K的添加可以明显降低摄食率,饲料中维生素K含量为2.15 mg/kg时,摄食率出现最大值,之后显著下降(P<0.05),在12mg/kg时达到最低值。特定生长率随着维生素K的添加表现出升高的趋势,饲料中维生素K含量为12 mg/kg时,出现最大值,但是差异不显著(P>0.05)。饲料中维生素K的含量从0.13 mg/kg升至3.25 mg/kg时,饲料效率显著升高(P<0.05),随着饲料中维生素K的进一步添加,趋于稳定(P>0.05),在12 mg/kg时达到最大值,并且与特定生长率呈正相关关系(SGR = 0.01 FE + 0.95,R2 = 0.95)。血液红细胞数目随着饲料维生素K含量的增加先显著升高(P<0.05),在6.40 mg/kg时达到最大值,之后趋于稳定(P>0.05)。血红蛋白含量、血球容积比、血清钙含量与血液中红细胞数目表现出相似的趋势,均在不添加维生素K组出现最低值,但是差异不显著(P>0.05)。肝体比、肥满度及鱼体生化组成均不受饲料维生素K水平的影响(P>0.05)。分别对饲料效率、红细胞数目进行折线回归得出异育银鲫幼鱼对维生素K的最适需求量为3.73-6.72 mg/kg饲料。 |
其他语种文摘
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A 10-week feeding experiment was conducted to determine vitamin K requirement of juvenile gibel carp (Carassius auratus gibelio). Purified diets with seven levels (0.13, 2.15, 3.25, 6.40, 12, 17.20 and 23.20 mg/kg diet) of supplemental vitamin K3 (menadione sodium bisulfite, MSB) were fed to C. gibelio (mean weight 2.17±0.01 g). Each diet was fed to triplicate groups of fish. The results showed that fish fed with the diet supplemented with 2.15 mg vitamin K/kg had significantly higher feeding rate (FR) than fish fed with diets supplemented with 12 mg vitamin K/kg (P<0.05). Specific growth rate (SGR) increased with increasing dietary vitamin K levels and reached the highest value when dietary vitamin K content was 12 mg/kg (P>0.05). Feed efficiency (FE) was the highest in fish fed with diet supplemented with ≥3.25 mg vitamin K/kg, intermediate with 2.15 mg vitamin K/kg supplemented diet and the lowest in the control group (P<0.05). FE reached the highest value when the dietary vitamin K content was 12 mg/kg (P<0.05) and showed a linear correlation with SGR (SGR = 0.01 FE + 0.95, R2 = 0.95). The number of red corpuscles (RBC) in blood increased significantly with increasing dietary vitamin K level (P<0.05) and reached the plateau at 6.40 mg vitamin K/kg. The Hb content, Hct and serum Ca content followed the same trend as RBC and were the lowest in gibel carp fed with diet without vitamin K supplementation (P>0.05). HSI, CF and whole body composition were not affected by dietary vitamin K level (P>0.05). Based on the broken-line regression between FE or RBC and dietary vitamin K level, we concluded that the adequate supplemental dietary vitamin K content for gibel carp was 3.73-6.72 mg/kg. |
来源
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水生生物学报
,2013,37(1):8-15 【核心库】
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关键词
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异育银鲫
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维生素K
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饲料利用
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血液指标
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需求量
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地址
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中国科学院水生生物研究所, 淡水生态与生物技术国家重点实验室, 武汉, 430072
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1000-3207 |
学科
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水产、渔业 |
基金
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国家现代农业产业技术体系建设专项资金项目
;
国家973计划
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国家公益性行业(农业)科研专项
;
国家自然科学基金
;
FEBL
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文献收藏号
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CSCD:4755656
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