4Komegay E T, Rhein-Welker D, Lindemarm M D, Wood C M. 1995. Performance and nutrient digestibility in weanling pigs as influenced by yeast culture additions to starter diets containing dried whey or one of two fiber sources[J]. Journal of Animal Science. 73(5):1381-1389.
5Mathew A G, Chattin S E, Robbins C M, Golden D A. 1998. Effects of a Direct-Fed Yeast Culture on Enteric Microbial Populations, Fermentation Acids, and Performance of Weanling Pigs[J]. Journnal of Animal Science. 76:429-434.
6Jurgens M H, Rikabi R A, Zimmerman D R, 1997, The effect of dietary active dry yeast supplement on performance of sows during gestation-lactation andtheir pigs[J]. Journal of Animal Science. 75(3):593-597.
7Orban J I, Patterson J A, Adela O, et al. Growth performance intestinal microbial populations of growing pigs fed diets containing sucrose thermal oligosaccharide caramel [J]. Journal of Animal Science. 1997,75: 170-175.
8Hampson D. J, Hinton M, Kidder D. E. Coliform numbers in the stomach and small intestine of healthy pigs following weaning at three weeks of age[J]. Journal of Comparative Pathology.1985, 95(3),?353 -362.
