6Giesting Donald W, Roos Mark A, Easter Robert A. Evaluation of the effect of fumaric acid and sodium bicarbonate addition on performance of starter pigs fed diets of different types [J]. J.Anim. Sci.,1991,69:2489-2496.
7Ewing W. N. The living gut[M].Nottingham university press,2008:143.
8Yanar M. G u ler O., Bayram B., et al.Effects of feeding acidified milk replacer on the growth, health and behavioural characteristics of Holstein Friesian calves[J].Turk. J. Vet. Anita. Sci.,2006,30:235-241.
9Nocek J. E.,Braund D. G.Performance,health and postweaning growth on calves fed cold,acidified milk replacer ad libitum[J].J. Dairy Sci., 1986,69:1871 - 1883.
10Porter J. W. G. Digestion in the pre-ruminant animal[J].Proc. Nutr. Soc.,1969,28:115-121.
