Armstrong W D, Clawson A J
J Anim Sci. 1980 Mar;50(3):377-84. doi: 10.2527/jas1980.503377x.
Four experiments involving a total of 304 crossbred pigs weaned at 3 to 4 weeks of age were conducted to examine the effect of feeding supplemental liquid milk two to three times daily at weaning and (or) of altering the nutrient composition of the weaning diet. In addition, the effects on postweaning performance of preconditioning young pigs to supplemental milk feeding in the farrowing house were determined. Performance immediately postweaning was poor and was characterized by low weight gains and low feed intakes for approximately 7 days. Increasing the protein and (or) energy concentrations in the weaning diet had no beneficial effect on pig performance in Exp. 1. Feeding supplemental cow's milk three times daily for 4 days postweaning and (or) adding fat to the dry weaning diet also had no beneficial effect on pig performance in Exp. 2. An added milk product to the diet did tend to improve feed efficiency in this experiment. In the third experiment, performance was not affected by supplemental liquid milk feeding three times daily for 7 days and twice daily for an additional 7 days. Additions of 30% nonfat dried milk to the dry diet offered ad libitum did result in improvement in pig performance. Preconditioning of young pigs to supplemental liquid feeding while still nursing the sow resulted in no beneficial response in pig performance immediately postweaning in Exp. 4.
开展了四项试验，共涉及304头3至4周龄断奶的杂交猪，以研究断奶时每天喂给两到三次补充液态奶和（或）改变断奶日粮营养成分的效果。此外，还测定了在产仔舍让仔猪预先适应补充牛奶饲喂对断奶后性能的影响。断奶后立即的生长性能较差，特征是大约7天内体重增加缓慢且采食量低。在试验1中，提高断奶日粮中的蛋白质和（或）能量浓度对猪的生长性能没有有益影响。在试验2中，断奶后每天喂三次补充牛奶，持续4天，和（或）在干断奶日粮中添加脂肪，对猪的生长性能也没有有益影响。在此试验中，日粮中添加一种奶制品确实倾向于提高饲料效率。在第三个试验中，每天喂三次补充液态奶，持续7天，然后每天喂两次，再持续7天，对生长性能没有影响。在自由采食的干日粮中添加30%脱脂奶粉确实使猪的生长性能得到改善。在试验4中，仔猪在仍哺乳母猪时预先适应补充液体饲喂，对断奶后立即的生长性能没有产生有益的反应。
