References

Bach, A., S. Calsamiglia and M.D. Stern, 2005. Nitrogen metabolism in the rumen. J. Dairy Sci., 88: E9-E21.
CrossRef  |  Direct Link  |  

Cecava, M.J., N.R. Merchen, L.L. Berger, R.I. Mackie and G.C. Fahey Jr., 1991. Effects of dietary energy level and protein sources on nutrient digestion and ruminal nitrogen metabolism in steers. J. Anim. Sci., 69: 2230-2243.
PubMed  |  

Commun, L., M.M. Mialon, C. Martin, R. Baumont and I. Veissier, 2009. Risk of subacute ruminal acidosis in sheep with separate access to forage and concentrate. J. Anim. Sci., 87: 3372-3379.
CrossRef  |  

Feng, Z. and M. Gao, 2010. The improvement of NH3-N measurement within ruminal fluid by colorimetric method. Anim. Husbandry Feed Sci., 31: 37-37.

Han, Z. and J. Chen, 1988. Digestibility and Metabolism of Rumen. Scientific Press, Beijing, China .

Harrison, D.G., D.E. Beever, D.J. Thoms and D.F. Osbourn, 1975. Manipulation of rumen fermentation in sheep by increasing the rate of flow of water from the rumen. J. Agric. Sci. Camb., 85: 93-101.
CrossRef  |  Direct Link  |  

Hou, S., Z. Wang and M. Ni, 2012. The study on technique of pasturing Tibetan ewe feeding at Qinghai-Tibetan alpline. Chinese Agric. Sci. Bull., 28: 31-34.

McCarthy Jr., R.D., T.H. Klusneyer, J.L. Vicini, J.H. Clark and D.R. Nelson, 1989. Effects of source of protein and carbohydrate on ruminal fermentation and passage of nutrients to the small intestine of lactating cows. J. Dairy Sci., 72: 2002-2016.
Direct Link  |  

Na, R., R. Gui, C. Ao, Q. Zhao, Z. Dong and Z. Ma, 2004. Effect of yeast culture on rumen fermentation and production performance of sheep. J. China Anim. Husbandry Vet. Medic., 31: 6-9.
Direct Link  |  

Robinson, J.J., 1990. Nutrition in the reprioduction of farm animals. Nutr. Res. Rev., 3: 253-276.
CrossRef  |  PubMed  |  

Sauvant, D., F. Meschy and D. Mertens, 1999. Components of ruminal acidosis and acidogenic effects of diets. Prod. Anim., 12: 49-60.
Direct Link  |