3F. Blecha , D. S. Pollmann,D. A. Nichols. WEANING Weaning Pigs at an Early Age Decreases Cellular Immunity[J]. J Anim Sci. 1983,56(2):396-400.
4M. A. Sutherland, S. L. Rodriguez-Zas, M. Ellis. Breed and age affect baseline immune traits, cortisol, and performance in growing pigs[J]. J Anita Sci. 2005,83 :2087-2095.
5R. G. Main, S. S. Dritz, M. D. Tokach. Increasing weaning age improves pig performance in a multisite production system[J]. J Anim Sci. 2004, 82:1499-1507.
6M. Berkeveld, P. Langendijk, H. M. G. van Beers- Schreurs,et al. Postweaning growth check in pigs is markedly reduced by intermittent suckling and extended lactation[J]. J Anim Sci. 2007,85:258-266.
7G. L. Cromwell, G. L. Allee,D. C. Mahan. Assessment of lactose level in the mid- to late-nursery phase on performance of weanling pigs[J]. J Anim Sci., 2008,86:127 -133.
8D. A. Gahan 1, M. B. Lynchl, J. J. Callanl,et al. Performance of weanling piglets offered low-, medium- or high- lactose diets supplemented with a seaweed extract from Laminaria spp[J]. Animal, 2009,3(1):24-31.
9D. C. Kendall, A. M. Gaines, G. L. Allee, et al. Commercial validation of the true ileal digestible lysine requirement for eleven to twenty-seven-kilogram pigs[J]. J Anim Sci.2008,86:324-332.
10R. D. Coffey , G. L. Cromwell. The impact of environment and antimicrobial agents on the growth response of early-weaned pigs to spray-dried porcine plasma[J]. J Anim Sci.,1995,73:2532-2539.
