3Menke K H, Raab L, Saiewski A, et al. The estimation of the digestibility and metabolizable energy content of ruminant feeding stuffs from the gas production when they are incubated with rumen liquor in vitro[J]. J Agric Sci, 1979,93:217-222.
4杨胜.饲料分析及饲料质量检测技术[M].北京:中国农业出版社,1994
5Van Soest P J, Sniffen C J, Mertens D R, et al. A net protein system for cattle: The rumen submodel for nitrogen [A]. In: Owens F Ned. Protein Requirements for Cattle: Proceedings of an International Symposium[C]. DivofAgric: Oklahoma State Univ, 1981.
6Krishnamoorthy U C, Sniffen C J, Stern M D, et al. Evaluation of mathmatical model of digesta and in vitro simulation of rumen proteolysis to estimate the rumen undegraded nitrogen content of feedstuffs[J]. Brit J Nutr, 1983, 50: 555.
7American Association of Cereal Chemists:"Approved Methods of the AACC"[M]. New York: Chemistry International, 1976,76-11.
8Sniffen C J, O'Connor J D, Van Soest P J, et al. A net carbohydrate and protein system for evaluating cattle diets:Ⅱ. Carbohydrate and protein availability[J]. Anita Sci,1992, 70: 3562-3577.
9Smith L W, Goering H K, Gordon C H. Relationships of forage compositions with rates of cell wall digestion and indigestibility of cell walls[J]. Dairy Sei, 1972, 55:1140.
5Sarvant D, Dijstra J, Mertens D. Optimisation of ruminal, digestion: a modeling approach[A]. In: M Journet, E Grenet, M H Francd, et al. Recent developments in the nutrition of herbivores. Proceedings of the IVth international symposium on the nutrition of herbivores[C]. Paris: INRA Editions, 1995.43-165.
6Bergman E N. Energy contributions of volatile fatty acids from the gastrointestinal tract in various species[J]. PHysiol Rev, 1990,70:567-590.
7Sniffen C J, J D Oconnor, P J Van Soest mD G Fox, et al. A net carbohydrate and protein system fir evaluating cattle diets: Ⅱ carbohydrate and protein availability[J]. J Anim Sci, 1992,70: 3562-3577.
8杨胜.分析及饲料质量检测技术[M].北京:北京农业出版社,1994..
9Blümmel M, rskov E R. Comparison of gas production and nylon bag degradability of roughages in predicting feed intake in cattle[J]. Anim Feed Sci Technol, 1993, 40: 109-119.