Effect of milkreplacer nutrition levels on performance of early weaned lambs in alpine pastoral areas

Four milkreplacer diets (A, B, C and D), their digestible energy (MJ/kg) and crude protein (%) were 18.5 and 23.0, 20.0 and 25.0, 21.5 and 27.0, 23.0 and 29.0 respectively, were designed to study their feeding effects on earlyweaned lambs in alpine pastoral area. Thirty lambs (10 day old) were randomly divided into 5 groups including 4 test groups (A, B, C, D) and 1 control group (E). The lambs in Group E were raised with ewes milk. The trial period was 90 days. The results showed that the weight and the daily gain of Group E were higher than the test groups while the lamb age was 50 and 70 days. While the age was 90 days, the body weight of Group C and D was significantly higher than Group A (P0.05); Group E was higher than Group A, B, C (P0.05), but the difference between group D and E (P0.05) was not significant. Rumen index of Group E was significantly lower than Group B, C and D (P0.05), meanwhile, the kidney index and liver index were significantly lower than test groups (P0.05). It could be concluded that the milkreplacer contained 29.0% crude protein and 23.00 MJ/kg digestible energy was proper.