关键词: 共轭亚油酸, 鹅, 生长发育, 脂质代谢

Abstract: One hundred and ninety two Wulong-geese of one day old were selected and divided into four groups at random. They were fed diets of different CLA levels respectively (0.0, 5.0, 15.0 and 25.0g/kg), the body weight gain (BWG), feed intake (FI), the ratio of feed and gain (F/G), the abdominal fat percentage (AFP) of different growing stages and a few serum biochemical indexes about lipid metabolism were measured to investigate the effects of different levels of dietary Conjugated linoleic acid(CLA) on the growth and lipid metabolism of Wulong geese. The results showed that, 5.0g/kg and 15.0g/kg dietary CLA had no significant effect on the BWG of Wulong geese (P > 0.05), while the FI and F/G were decreased significantly (P < 0.05), the AFP and the content of serum TG, TC, VLDL were decreased significantly or very significantly (P < 0.05 or P < 0.01) and the content of serum HDL-C and the ratio of HDL-C/LDL-C were increased significantly (P < 0.05); 25.0g/kg dietary CLA decreased FI and AFP very significantly (P < 0.01), and had no significant effect on serum TG、TC、HDL-C、VLDL and HDL-C/LDL-C (P > 0.05). Conclusions: Appropriate amounts of dietary CLA could better promote the growth and regulate the lipid metabolism of Wulong geese, that’s to say, on the whole growing stage of Wulong geese, when dietary CLA was no higher than 15.0g/kg, it could not only improve the feed utilization ratio of Wulong geese in the premise of no effects on BWG, but also prevent atherosclerosis by reducing fat deposition and regulating lipid metabolism; but superfluous supplementation of CLA would restrain the growth of Wulong geese.

Key words: CLA, geese, growth, lipid metabolism