关键词: 仔猪[49ME], 早期断奶, 断奶体重, 饲粮类型

Abstract: This trial studied the difference of simple or complex diet to promote performance of pigs with different weaning age and weight. Pigs were weaned at 25, 35 and 45 d and 8 pigs of heavier, middle and lighter bodyweight within a age group were switched to simple diet(SD) of corn and soybean meal and complex diet(CD) consisted of corn, wheat, soybean meal, 3% dried whey, 2% whole milk and 3% fish meal to the end of experiment at pigs' age of 70 d. Pigs weaned at 45 d had better performance(P<0.01) than pigs of 35 or 25 d. There was no performance difference for pigs of d 35 and 25. As weaning weight of same age increased, performance was improved(P<0.01). Pigs fed CD had better performance than those fed SD(P<0.01). Interactions of age, weight and diet indicated thatFigs weaned earlier or with small weaning weight but fed CD had similar performance to those weaned later or/and with large weight but fed SD. Regression analyses showed that weaning weight was much more important for pigs' postweaning performance than weaning age and that feed intake was a key factor influencing pigs' performance, The results demonstrated that diet high in nutritive value be provided to pigs, especially those weaned earlier or with lighter weight, toincrease pigs' performance.

Key words: PIGLETS, EARLY WEANING, WEANING WEIGHT, TYPE OF DIET