苏禽6号蛋鸡早期血脂代谢规律研究OACSTPCD

In this study,the serum lipid metabolism of Suqin No.6 layers at early stage of life was determined so as to provide a theoretical basis for the early feeding and management and nutrient regulation of this crossbreeding system.The Suqin No.6 layers of 10-week-old were raised to 18 weeks of age.The Hy-line brown layers were used as control.Blood samples were collected from the layers and their serum lipid metabolic indices were measured every week.And the variance and correlation of the data were analyzed.The results showed that,from 10 to 18 weeks of age,the percentage of abdominal fat yield in the layers remained unchanged and then increased;that their liver index decreased first and then remained unchanged,their serum free fatty acid(FFA)level generally decreased,their total cholesterol(TC)and low-densi-ty lipoprotein(LDL)levels fluctuated,and their vitellogenin(VTG)level decreased and then remained generally unchanged.Compared with those of Hy-line brown layers,the percentage of abdominal fat yield and the serum TG level of the Suqin No.6 layers were higher in general,their TC level fluctuated,their HDL level was lower,and their VTG level was the same at the early stage and then significantly lower.The comparative analysis of the early stage and late stage development of the layers showed that,in the lipid metabolic indices,only FFA had sig-nificant differences in both the Suqin No.6 layers and the Hy-line brown layers(P<0.05).The percentage of abdominal fat yield and liver index had significant differences only in the Suqin No.6 layers(P<0.05).The serum TG level of the Suqin No.6 layers was significantly positively correlated with the VLDLy level and percentage of abdominal fat yield(P<0.01),and significantly negatively correlated with the FFA level(P<0.05).There were significantly positive correlations among TC,HDL and LDL levels(P<0.01).The present results indica-ted that the serum lipids of Suqin No.6 layers metabolized well at early stage of life,and that their metabolism was slower than that of high yielding layers.