1Durand M,Kawashima R.1980.Influence of minerals in rumen microbial digestion in digestive physiology and metabolism in ruminants[M].AUI Publ Co Inc, 373-383.
3Milton J T. 1985.Phosphorus metabolism in ruminants Ⅱ: Effect of in organic phosphorus centration upon food intake and digestion[J]. J Agric Res, 36 : 647-650.
4Stevani. 1992.Effect of sulphate supplementation of untreated and alkali-treated wheat straws on ruminant fermentation and microbial protein synthesis in a sem-continuous fermentor[J].Anim Feed Sci Tech, 36:287-301.
5Burrough Wise ,Anthong Lntona,Peter Depaul,et al. 1951.Mineral influence upon urea utilization and cellulose digestion by rumen microganisms using the artificial rumen technique[J].J Anim Sci, 10:693.
6Phillipson A T. 1953.Digestion of cellulose by the ruminant[J]. Bio Chem, 11:63-70.
7Chamberlain C C, Wise Burroughs. 1962.Effect of fluroie magnesium and manganeseions on in vitro cellulose digestion by rumen microorganisms[J].J Anim Sci ,21:428.