1Blummel , M, H.P.S. Makkar. K. Becker. In vitro gas production:a technique revised[J]. J.Anita. Physiol. a. Anim. Nutr., 1997, (77): 24~34
2Jenkins. Symposium Advances in ruminant lipid metabolism [J].Journal of Dairy Science, 1993, (76): 3851~3863
3Manyuchi,B,E.R. Orskov and R.N.B. Kay. Effects of feeding small amounts of ammonia treated straw on degradation rate and intake of untreated straw[J]. Animal Feed Science andTechnology, 1992, (38):293~304
4Karl Heinz Menke, Steingass Herbert, Estimation of the energetic feed value obtained from chemical analysis and in vitro gas production using rumen fluid[J]. Animal Research andDepartment, 1988, (28): 7~55