The effects of vitamin B₁ on growth, blood metabolites, body composition, intestinal enzyme activities and morphometric parameters were evaluated by a 63‐day feeding trial in Pelteobagrus fulvidraco fed diets containing vitamin B₁ with 4.29, 6.02, 7.86, 11.94 and 19.05 mg/kg, respectively. Results showed that 7.86 mg/kg vitamin B₁ resulted in significantly higher weight gain (WG), specific growth rate (SGR) and protein efficiency ratio (PER) (p < .05). Serum triglyceride, cholesterol and whole‐body lipid were observed in 11.94 mg/kg vitamin B₁ group significantly higher than those in 4.29 mg/kg group, accompanied by the lower serum glucose content in the same group (p < .05). Significantly higher values of whole‐body protein, serum total protein, relative intestinal length, fold height, intestinal trypsin, amylase, alkaline phosphatase, Na+/K+‐ATPase, γ‐glutamyl transpeptidase, creatine kinase, muscular layer thickness and intestosomatic index were observed in 7.86 mg/kg vitamin B₁ group compared with those in 4.29 mg/kg group (p < .05). These results suggested that diets supplemented with vitamin B₁ improved growth performance, feed utilization, intestinal digestive and absorption capacity of juvenile yellow catfish. The optimal dietary vitamin B₁ requirements estimated using a two‐slope broken‐line model based on WG and PER of yellow catfish were 7.42 and 6.01 mg/kg, respectively.

中文翻译：

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饮食中维生素B1对黄yellow鱼（Pelteobagrus fulvidraco）生长性能，血液代谢物，身体成分，肠道酶活性和形态参数的影响

通过一项在Pelteobagrus fulvidraco饲喂含有4.29、6.02、7.86、11.94和19.05 mg维生素B _1的日粮中进行的63天喂养试验，评估了维生素B ₁对生长，血液代谢物，身体组成，肠道酶活性和形态参数的影响。/ kg。结果表明，7.86 mg / kg的维生素B _1可显着提高体重增加（WG），比生长速度（SGR）和蛋白质效率比（PER）（p  <.05）。11.94 mg / kg维生素B ₁组的血清甘油三酸酯，胆固醇和全身脂质显着高于4.29 mg / kg组，同时同一组的血清葡萄糖含量较低（p <.05）。观察到全身蛋白，血清总蛋白，相对小肠长度，折叠高度，小肠胰蛋白酶，淀粉酶，碱性磷酸酶，Na + / K + -ATPase，γ-谷氨酰转肽酶，肌酸激酶，肌肉层厚度和小肠指数明显更高的值7.86 mg / kg维生素B ₁组的维生素B含量为4.29 mg / kg组（p  <0.05）。这些结果表明，补充维生素B _1的日粮可改善幼年黄cat鱼的生长性能，饲料利用率，肠道消化吸收能力。使用基于黄cat鱼WG和PER的两坡折线模型估算的最佳膳食维生素B ₁需求分别为7.42和6.01 mg / kg。