文章摘要
蒋广震,刘文斌,王煜衡,李向飞,庄苏.饲料中蛋白脂肪比对斑点叉尾鮰幼鱼生长、消化酶活性及肌肉成分的影响[J].水产学报,2010,34(7):1129~1135
饲料中蛋白脂肪比对斑点叉尾鮰幼鱼生长、消化酶活性及肌肉成分的影响
Effects of dietary protein to lipid ratio on growth,digestive enzyme activities and muscle composition of juvenile channel catfish(Ictalurus punctatus)
投稿时间:2010-03-08  修订日期:2010-04-07
DOI:10.3724/SP.J.1231.2010.06862
中文关键词: 斑点叉尾鮰  蛋白脂肪比  生长  消化酶活性  肌肉成分
英文关键词: channel catfish (Ictalurus punctatus)  dietary protein to lipid ratio  growth performance  digestive enzyme activity  muscle composition
基金项目:江苏省水产三项工程项目“无公害斑点叉尾〖XC6HH.TIF〗饲料开发”(PJ2007-13);苏北科技发展专项资金项目“无公害环保型斑点叉尾鮰饲料产业化及示范”(BN2008208)
作者单位E-mail
蒋广震 南京农业大学 2009205013@njau.edu.cn 
刘文斌 南京农业大学 wbliu@njau.edu.cn 
王煜衡 南京农业大学  
李向飞 南京农业大学  
庄苏 南京农业大学  
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中文摘要:
      探讨了不同的蛋白和脂肪水平对斑点叉尾鮰生长与品质等的影响,试验设计以豆粕调节蛋白含量,混合油脂(鱼油∶豆油=1∶1)调节脂肪含量,并以α-淀粉和次粉为填充物,共配制3个蛋白(P)水平(28%,32%,36%),每一蛋白水平设3个脂肪(L)水平(5.0%,7.5%,10.0%),共9种饲料,分别为P28L10,P32L10,P36L10,P28L7.5,P32L7.5,P36L7.5,P28L5,P32L5和P36L5,每组4重复,每重复80尾鱼[(1.5±0.02)g]。饲养60 d后,进行生产性能测定,并采集肌肉等组织样本,测定相关指标。结果表明:饲料蛋白脂肪比对斑点叉尾鮰幼鱼生长有显著影响(P<0.05)。其中P36L7.5组增重率(WGR)、饲料效率(FCR)最高,与P36L10和P32L7.5组差异不显著(P>0.05),但显著高于其它组(P<0.05)。P36L10组试验鱼肥满度(CF)最高,与P32L7.5和P36L7.5组差异不显著(P>0.05),但显著高于其他组(P<0.05)。鱼体内脏比(VBR)、腹脂率(MSI) 随脂肪水平降低而显著降低(P<0.05)。试验各组肌肉水分含量差异不显著(P>0.05),肌肉脂肪含量随饲料中脂肪和蛋白水平的降低而显著降低(P<0.05)。肝胰脏脂肪酶、胃蛋白酶活力随着饲料脂肪水平的增加而提高(P<0.05),但其他消化酶活力差异不显著(P>0.05)。由此可见,饲料中7.5%的脂肪,32%的蛋白质,蛋能比22.4 mg/kJ可满足斑点叉尾鮰幼鱼的生长需要,同时又能保证其正常生理机能,建议可在实际生产配方中作参考值。
英文摘要:
      A 60 day feeding trial of 3 dietary protein levels (28%,32% and 36%) and 3 dietary lipid levels (5.0%,7.5% and 10.0%) designed with 4 replications was conducted to determine the effects of dietary protein and lipid levels on growth,digestive enzyme activities and muscle composition of juvenile channel catfish[initial body weight:(1.5±0.02)g].Fish were fed respectively to apparent satiation by 9 experimental diets named P28L10,P32L10,P36L10,P28L7.5,P32L7.5,P36L7.5,P28L5,P32L5 and P36L5 with 4 replications.The results indicated that weight growth rate (WGR) and feed coefficient rate (FCR) were significantly affected by dietary protein and lipid levels or a dietary protein × lipid interaction (P<0.05).WGR and FCR of fish fed the P28L10 diet were the lowest among all the treatments (P<0.05).Growth performance of fish fed diets with 28% protein were lower than that of fish fed higher protein levels (P<0.05);the lowest growth performance was observed in fish fed the P28L10 diet.The highest WGR was obtained in fish fed the P36L7.5 diet;and no obvious differences of WGR were found in fish fed the P36L7.5,P36L10 and P32L7.5 diets (P>0.05).Activities of liver lipase and stomach protease changed significantly as dietary lipid levels increased (P<0.05).Muscle lipid levels decreased significantly with dietary lipid levels (P<0.05),and muscle protein levels could be influenced by dietary protein and lipid levels.Viscerasomatic index (VSI),mesenteric lipid somatic index (MSI) and condition factor (CF) together may show that muscle protein and lipid levels could be affected by dietary protein × lipid interaction.In conclusion,this study suggests that growth performance of juvenile channel catfish is improved at a suitable protein/lipid ratio in diet.Fish fed diet containing 32% protein,7.5% lipid and 22.4 mg/kJ P/DE ratio got the best growth performance and the ideal body composition.
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