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艾庆辉, 谢小军. 南方鲇的营养学研究:饲料中大豆蛋白水平对生长的影响[J]. 水生生物学报, 2002, 26(1): 57-65.
引用本文: 艾庆辉, 谢小军. 南方鲇的营养学研究:饲料中大豆蛋白水平对生长的影响[J]. 水生生物学报, 2002, 26(1): 57-65.
AI Qing-hui, XIE Xiao-jun. THE NUTRITION OF SILURUS MERIDIONALIS: EFFECTS OF DIFFERENT LEVELS OF DIETARY SOYBEAN PROTEIN ON GROWTH[J]. ACTA HYDROBIOLOGICA SINICA, 2002, 26(1): 57-65.
Citation: AI Qing-hui, XIE Xiao-jun. THE NUTRITION OF SILURUS MERIDIONALIS: EFFECTS OF DIFFERENT LEVELS OF DIETARY SOYBEAN PROTEIN ON GROWTH[J]. ACTA HYDROBIOLOGICA SINICA, 2002, 26(1): 57-65.

南方鲇的营养学研究:饲料中大豆蛋白水平对生长的影响

THE NUTRITION OF SILURUS MERIDIONALIS: EFFECTS OF DIFFERENT LEVELS OF DIETARY SOYBEAN PROTEIN ON GROWTH

  • 摘要: 以初始体重为23.78±0.09g的南方鲇幼鱼为实验对象,在室内循环水养殖系统中进行为期6周的生长实验。以大豆蛋白分别替代0%、13%、26%、39%、52%和65%的鱼粉蛋白,配制成6种等氮(粗蛋白为48%)、等能(总能20KJ/g)的饲料,用于探讨饲料中鱼粉蛋白与大豆蛋白的不同比例对南方鲇生长及饲料转化率的影响。实验在27.5±0.2℃水温条件下进行,溶氧维持在5mg/L以上,光照周期为14L:10D。实验结果表明,当大豆蛋白分别替代13%、26%和39%的鱼粉蛋白时,3组之间的特定生长率(SGR)的差异不显著(P0.05),但均显著高于52%和65%替代水平(P0.05)。其中13%和26%的替代水平的特定生长率(SGR)显著高于对照组(P0.05);39%替代水平的特定生长率(SGR)与对照组之间差异不显著(P0.05);而52%和65%替代水平的特定生长率(SGR)则显著低于对照组(P0.05)。饲料转化率(FCE)、蛋白质效率(PER)和蛋白质累积率(PPV)分别在各处理组之间的差异关系与特定生长率(SGR)在各组之间的变化相类似。因此,本文提出南方鲇饲料中大豆蛋白替代39%的鱼粉蛋白是适宜的,过量的添加将影响南方鲇的生长及饲料转化率。通过分析认为大豆蛋白影响南方鲇生长的因素是其消化率较低及氨基酸不平衡。

     

    Abstract: A growth experiment was conducted in a recirculating rearing system on juvenile of the southern catfish, Silurus meridionalis, at 27.5±0.02℃. Six isonitrogenous (48% protein) and isoenergetic (20KJ/g gross energy) diets, with soybean meal protein (SP) replacing 0%, 13%, 26%, 39%, 52% and 65% of fish meal protein (FP), were formulated to examine the effects of different levels of SP on growth and feed conversion efficiency. The results showed that the specific growth rates (SGRs) in fish fed the diets with 13% and 26% of SP were significantly higher than those of control group (P0.05), while the SGRs in fish fed the diets with 52% and 65% of SP were significantly lower than those of control group (P0.05). The SGRin fish fed the diet with 39% of SP was higher compared with control group, but the difference was not significant (P0.05). There were no significant differences in SGRamong fish fed the diets with 13%, 26% and 39% of SP (P0.05). The changes of feed conversion efficiency (FCE), protein efficiency ratio (PER) and protein productive value (PPV) among different tested groups followed the similar pattern as that of SGR. The results indicated that 39% of FP could be replaced with SP in the diet for the southern catfish and excessive inclusion of dietary SP will result in poor growth and low feed conversion efficiency. Discussion in this paper suggested that the main limitations in use of dietary SP for the catfish were due to its low digestibility and imbalance of amino acid.

     

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