Authors : Yu Shi-Gang, Li Hai-Ying, Fang Chao, Qin Chong-Kai and Liu Wu-Jun
Abstract: In the present study, effects of early weaned time on biochemical indicators in serum of lambs of Xinjiang local sheep breeds in China were analized. The lamb of Chinese Merino sheep (Xinjiang type) (M), Kazak sheep (K) and Bayinbuluk sheep (B) were used for as experiment animals. The lambs were sorted as three groups (G1 and G2) are experiment groups, early weaning at 40 and 60 days, respectively fed with milk replacer. The control group suckled with milk of ewes (G3). Blood samples were collected at 90 days of the lambs. The indicators in serum measured include: ALB, SUN, CHOL, GLU, TG, LDL, HDL, AST, ALT, LDH, Cp, IgG, IgM, IgA. The results show: As for biochemical indicators in serum reflecting nutrient material metabolism, Chinese Merino sheep (Xinjiang type): experiment groups are higher than G3 at SUN level, significantly (p<0.05). As for GLU level, G1 is significantly lower than G3 (p<0.05). G1 is significantly lower than G3 at CHOL level (p<0.05). There are no significant differences at other parameters among groups. Kazak sheep: experiment groups are higher than G3 at SUN level, significantly (p<0.05). As for the GLU level, G2 is significantly higher than G3 (p<0.05). As for CHOL, LDL, DHL level, experiment groups are significantly higher than G3 (p<0.05). Bayinbuluk sheep: As for SUN level, experiment groups are significantly lower than G3 p<0.05). As for GLU level, experiment groups are significantly higher than G3 (p<0.05). CHOL, TG, LDL and HDL level of lambs in serum were not significant affected by early weaning. As for the change of enzyme activity in serum reflecting stress of lambs, Chinese Merino sheep (Xinjiang type): experiment groups are significantly higher than G3 at AST activity (p<0.05), G1 is significantly lower than G3 at ALT activity (p<0.05), G2 is significantly lower than G3 at LDH activity (p<0.05). Kazak sheep: As for AST activity, G1 is significantly lower than G3 (p<0.05). As for the ALT, LDH activity, there are no significant differences among groups. Bayinbuluk sheep: ALT, AST, LDH activity in serum of lambs were not affected by early weaning. As for the change of Immunoglobulin and Cp in serum, Chinese Merino sheep (Xinjiang type): G1 is singnificantly lower than G3 at IgG level (p<0.05). Kazak sheep: Experiment groups are significantly lower than G3 at IgM level (p<0.05). Bayinbuluk sheep: there are no significant differences at IgA, IgM, IgG and Cp level among groups. In conclusion, early weaning have not negative effect on indicators in serum of Bayinbuluke lamb. As for weaning age, it is better for China merino (Xinjiang type) and Kazakh lamb to wean at 60 days, there is no significant differences weaned at 40 and 60 days for Bayinbuluke lamb.
Yu Shi-Gang, Li Hai-Ying, Fang Chao, Qin Chong-Kai and Liu Wu-Jun, 2010. Effect of Early Weaning on Biochemical Indicator in Serum of Xinjiang Local Sheep Breeds in China. Journal of Animal and Veterinary Advances, 9: 2659-2664.