10Engberg R M, Hedemann M S, Leser T D, et al. Effect of zinc bacitracln and salinomyein on intestinal microflora and perfo mance of broilers[J]. Poult Sci, 2000, 79(9): 1 311-1 319.
8Knarreborg A, Jensen SK, Engberg RM. Pancreatic lipase activity as influenced by unconjugated bile acids and pH, measured in vitro and in vivo[J] .J Nutr Biochem,2003,14(5):259 - 265.
9Polin D, wing T L, Pell K E. The effect of bile acids and lipase on absorption of tallow in young chicks[J]. Poetry Sci., 1980,59: 2738 - 2743.
10Preston C M, McCracken K J, Bedford M R. Effect of wheat content, fat source and enzyme supplementation on diet metabolizability and broiler performance [J], Br. Poult. Sci., 2001,42 : 625 - 632.