摘要
研究了葡萄糖饲料和淀粉饲料中添加 2mg/kg有机铬对初始体重约 1 4g的奥尼罗非鱼鱼种生长和糖利用的影响。经过 8周饲养 ,添加烟酸铬和吡啶羧酸铬的葡萄糖组罗非鱼特定生长率显著高于对照组 (P <0 0 5 )。饲料效率在添加烟酸铬和吡啶羧酸铬的葡萄糖组和淀粉组均显著高于对照组 (P <0 0 5 )。全鱼营养成分分析表明 ,添加吡啶羧酸铬、乙酸铬的葡萄糖组罗非鱼水分含量显著低于相应的淀粉组 ,而粗脂肪含量显著高于相应的淀粉组 (P <0 0 5 )。添加吡啶羧酸铬的葡萄糖组肝脏果糖二磷酸酶活力显著低于相应的淀粉组 ,而背肌磷酸果糖激酶活力显著高于相应的淀粉组 (P <0 0 5 )。结果说明 ,有机铬能显著促进罗非鱼对葡萄糖的利用 ;罗非鱼对葡萄糖和淀粉的利用能力无显著差异 。
An 8-week growth trial was conducted to investigate the effect of different forms of organic chromium on glucose and starch utilization in hybrid tilapia Oreochromis niloticus×O.aureus. The forms of Cr were chromium nicotinate acid(Cr-Nic), chromium picolinate acid(Cr-Pic), chromium methionine(Cr-Met) and chromium acetic acid(Cr-Ac). The inclusion level of Cr was 2mg/kg diet. Fishes of 1.4g were reared in a still water system and fed at 6%-8% of body weight 4 meals/day. Significantly (P<0.05) higher specific growth rate were observed in fish fed the glucose diet with Cr-Nic and Cr-Pic, while no significant difference was observed in those fed the starch diet (P>0.05). Feed efficiencies in fish fed diets with Cr-Nic and Cr-Pic were significantly higher than those fed diets without Cr. The contents of body moisture in fish fed the glucose diet were significantly lower than those fed the starch diet, while the contents of body lipid were significantly higher. Dorsal muscle phosphfructokinase activity in fish fed the glucose diet with Cr-Pic was significantly higher than that fed the starch diet with Cr-Pic, whereas hepatic fructose-1,6-phophatase activity was significantly lower. The results suggested that organic Cr could improve glucose utilization significantly in hybrid tilapia under the present experimental condition. There was no significant difference between glucose and starch utilization in hybrid tilap, while dietary carbohydrate sources could affect the whole body composition.
出处
《水生生物学报》
CAS
CSCD
北大核心
2002年第4期393-399,共7页
Acta Hydrobiologica Sinica
基金
国家自然科学基金资助 (批准号 :3980 0 1 0 4 )
关键词
罗非鱼
生长
糖
有机铬
Tilapia
Growth
Carbohydrate
Organic chromium
