An 8‐week experiment was conducted to determine the optimal dietary lysine requirement for juvenile Protonibea diacanthus. Six isonitrogenous and isolipidic diets were formulated to contain levels of 10.8 (L10.8), 18.2 (L18.2), 26.1 (L26.1), 33.9 (L33.9), 40.7 (L40.7) and 48.6 g/kg (L48.6) of diets and were fed to the juvenile Protonibea diacanthus, respectively. The results indicated that weight gain (WG), specific growth rate (SGR), protein efficiency ratio (PER) and final weight (FW) increased as the dietary lysine level increased from 10.8 to 26.1 g/kg and then decreased as the dietary lysine levels further increased (p < .05). The lowest feed conversion ratio (FCR) was found when dietary lysine level was 26.1 g/kg. Analysis of specific growth rate by two slope broken‐line model indicated that the estimated optimal dietary levels of lysine for juvenile Protonibea diacanthus was 23.06 g/kg (51.24 g/kg dietary protein).

中文翻译：

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幼年Protonibea diacanthus的饮食赖氨酸需求量

进行了为期8周的实验，确定了幼年Protonibea diacanthus的最佳饮食赖氨酸需求量。配制了六种等氮和等脂日粮，使其含量分别为10.8（L10.8），18.2（L18.2），26.1（L26.1），33.9（L33.9），40.7（L40.7）和48.6 g / kg （L48.6）节食，分别喂食了幼年的Protonibea diacanthus。结果表明，随着日粮赖氨酸水平从10.8 g / kg增加到26.1 g / kg，体重增加（WG），比生长速率（SGR），蛋白质效率比（PER）和最终体重（FW）增加，而随着日粮赖氨酸水平的增加而降低水平进一步增加（p <.05）。当日粮赖氨酸水平为26.1 g / kg时，饲料转化率（FCR）最低。通过两个斜率折线模型对比生长速率的分析表明，估计幼年Protonibea diacanthus赖氨酸的最佳日粮水平为23.06 g / kg（51.24 g / kg日粮蛋白）。