摘要
用分别添加0．0（CK）、0．2、0．4、0．8、1.6和3．2mg／kg毗啶羧酸铬的饲料投喂初始体质量为（12．78±1．16）g的草鱼10周，研究吡啶羧酸铬对草鱼生长和糖耐量的影响。结果表明，饲料中添加吡啶羧酸铬0．8mg／kg能显著提高草鱼的特定生长率、蛋白质效率和蛋白质沉积率，0．8mg／kg组的饲料系数显著低于不添加铬的对照组。对照组及添加吡啶羧酸铬0．2～3．2mg／kg组血糖的最高值分别出现在灌服葡萄糖后2h、3h、3h、4h、3h和3h。灌服葡萄糖后9h时各组的血糖水平均降至比空腹时略高但无显著差异的水平。灌服葡萄糖后各组血糖高峰值以未添加铬的对照组最大，0．2～0．4mg／kg和1．6～3．2mg／kg组次之，0．8mg／kg组最小。本试验结果显示，饲料中添加吡啶羧酸铬0．8mg／kg能促进草鱼的生长，提高草鱼对葡萄糖的耐受量。
A growth trial was conducted to investigate the effects of chromium picolinate on growth and glucose tolerance in grass carp fingerling, Ctenopharyngodon idellus. Fish （average initial body weight=12. 78±1.16 g） were fed with six experimental diets with chromium picolinate added at different levels of 0. 0,0. 2,0. 4,0. 8,1. 6,3. 2 mg/kg for 10 weeks. The results showed that fish fed the diet supplemented with 0. 8 mg/kg Cr had significantly higher specific growth rate, protein efficiency ratio and protein retention,in contrast,feed conversion rate had a significantly lower than control group. The peak value of serum glucose was at 2 h,3 h,3 h,4 h,3 h and 3 h after oral administration when diets with supplementation of chromium raise from 0. 0 mg/kg to 3.2 mg/kg. The peak value of serum glucose was maximal in fish fed the diet supplemented with 0.0 mg/kg Cr, intermediate in fish fed diets supplemented with 0.2-0. 4 mg/kg Cr and 1.6-3.2 mg/kg Cr, and minimal in fish fed the diet supplemented with 0. 8 mg/kg Cr. All the results indicate that the supplementation of 0. 8 mg/kg chromium improved the growth performance and glucose tolerance of grass carp.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2009年第2期198-201,共4页
Journal of Huazhong Agricultural University
基金
国家“十一五”科技支撑计划重点项目(2006BAD03B03)
上海市教委重点学科建设项目(Y1101)资助
关键词
吡啶羧酸铬
草鱼
生长
糖耐量
chromium picolinate
Ctenopharyngodon idellus
growth
glucose tolerance
