References

AOAC, 1990. Official Methods of Analysis. 15th Edn., Association of Official Analytical Chemists, Washington, DC., USA.

Briggs, P.K., J.P. Hogan and R.L. Reid, 1957. The effect of volatile fatty acid, lacticcid and ammonia on rumen pH in sheep Aust. J. Agric. Res., 8: 674-690.
CrossRef  |  

Coombe, J.B., D.E. Tribe and J.W.C. Morrison, 1960. Some experimental observations on the toxicity of urea to sheep. Aust. J. Agric. Res., 11: 247-256.
CrossRef  |  Direct Link  |  

Davis, G.V. and O.T. Stallcup, 1967. Effect of soybean meal, raw soybeans, corn gluten feed and urea on the concentration of rumen fluid components at intervals after feeding. J. Dairy Sci., 50: 1638-1645.
PubMed  |  Direct Link  |  

Davis, R.F., N.S. Woodhouse, M. Keeny and G.H. Beck, 1957. The effect of various levels of dietary protein upon the volatile fatty acids in the rumen of the dairy cow. J. Dairy Sci., 40: 75-80.
Direct Link  |  

Freitag, R.R., W.H. Smith and W.M. Beeson, 1968. Factors related to utilization of urea vs. protein nitrogen supplemented diets by the ruminant. J. Anim. Sci., 27: 478-485.
Direct Link  |  

Haskins, B.R., M.B. Wise, H.B. Craig and E.R. Barrick, 1967. Effect of levels of protein, source of protein and antibiotic on performance, carcass characteristics, rumen environment and liver abscesses of steers fed all-concentrate rations. J. Anim. Sci., 26: 430-434.
Direct Link  |  

Helmer, L.G. and E.E. Bartley, 1971. Progress in the utilization of urea as a protein replaced for ruminants. A review. J. Dairy Sci., 54: 25-51.

Helmer, L.G., E.E. Bartley and C.W. Deyoe, 1970. Feed processing. VI. Comparison of starea, urea and soybean meal as protein source for lactating dairy cow. J. Dairy Sci., 53: 883-887.
Direct Link  |  

Herrera-Saldana, R.J., T. Huber and M.H. Poore, 1990. Influence of varying protein and starch degradabilities on performance of lactating cows. J. Dairy Sci., 72: 1477-1483.

Holter, J.B., N.F. Colovos, R.M. Clark, R.M. Koes, H.A. Davis and W.E. Urband, Jr., 1971. Urea for lactating cattle. V. Concentrate fiber and urea in a corn silage-high concentrate ration. J. Dairy Sci., 54: 1475-1482.
Direct Link  |  

Hutjens, M.F. and L.H. Schultz, 1971. Addition of soybeans or methionine analog to high-concentrate rations for dairy cows. J. Dairy Sci., 54: 1637-1646.
Direct Link  |  

Jittakot, S., 1999. Effect of cassarea as a protein replacement for soybean meal on feed intake, blood metabolites, ruminal fermentation, digestibility and microbial protein synthesis in dairy cows fed urea-treated rice straw as a roughage. M.Sc. Thesis, Graduate School, Khon Kaen University, Khon Kaen, Thailand, pp: 171.

Jones, G.M., C. Stephens and B. Kensett, 1974. Utilization of starea, urea, or soybean meal in complete rations for lactating dairy cows. J. Dairy Sci., 58: 689-695.

Kim, C.H., 2001. Effect of different protein sources given synchronously or asynchronously into the rumen of consuming a beef cattle diet high in concentrate on the synthesis of microbial protein. Anim. Feed Sci. Technol., 43: 831-840.

Kolver, E., L.D. Muller, G.A. Vaga and T.J. Cassidy, 1998. Synchronization of ruminal degradation of supplemental carbohydrate with pasture nitrogen in lactating dairy cows. J. Dairy Sci., 81: 2017-2028.
CrossRef  |  PubMed  |  Direct Link  |  

Roffler, R.E. and L.D. Satter, 1973. Influence of ration composition on ruminal ammonia concentration. J. Dairy Sci., 56: 663-663.

Roman-Ponce, H., H.H. Van Horn, S.P. Mashall, C.J. Wilcox and P.F. Randel, 1974. Complete rations for dairy cattle V. Interaction of sugarcane bagasse quantity and form with soybean meal, urea and starea. J. Dairy Sci., 58: 1320-1327.
Direct Link  |  

Schmidt, S.P., N.A. Jorgensen, N.J. Benevenga and V.H. Burngart, 1973. Comparison of soybean meal, formaldehyde treated soybean meal, urea and starea for steers. J. Anim. Sci., 37: 1233-1237.
Direct Link  |  

Shabi, K., A. Arieli, L. Bruckental, Y. Aharoni, S. Zamwel, A. Bor and H. Tagari, 1998. Effect of the synchronization of the degradation of dietary crude protein and organic matter and feeding frequency on ruminal fermentation and flow of digesta in the abomasum of dietary cows. J. Dairy Sci., 81: 1991-2000.
PubMed  |  Direct Link  |  

Sinclair, L.A., P.C. Garnsworth, J.R. Newbold and P.J. Buttery, 1993. Effect of synchronizing the rate of dietary energy and nitrogen release on rumen fermentation and microbial protein synthesis in sheep. J. Agric. Sci. Cambridge, 120: 251-263.
CrossRef  |  Direct Link  |  

Sommart, K., D.S. Parker, P. Rowlinson and M. Wanapat, 2000. Fermentation characteristics and microbial protein synthesis in an in vitro system using cassava, rice straw and dried ruzi grass as substrates. Asian-Australas. J. Anim. Sci., 13: 1084-1093.
CrossRef  |  Direct Link  |  

Stiles, D.A., E.E. Bartley, R.M. Meyer, C.W. Deyoe and H.B. Pfost, 1970. Feed processing. VII. Effect of an expansion processed mixture of grain and urea (Starea) on rumen metabolism in cattle and on urea toxicity. J. Dairy Sci., 53: 1436-1441.
PubMed  |  Direct Link  |  

Thompson, L.H., M.B. Wise, R.W. Harvey and E.R. Barrick, 1972. Starea, urea and sulfur in beef cattle rations. J. Anim. Sci., 35: 474-482.
PubMed  |  Direct Link  |  

Whanger, P.D. and G. Matrone, 1966. Metabolism of lactic, succinic and acrylic acids by rumen microorganisms for sheep fed sulfur-adequate and sulfur defficient diets. Biochim. Biophys. Acta, 136: 27-35.
CrossRef  |  

Witt, M.W., L.A. Sinclair, R.G. Wilkinson and P.J. Buttery, 1999. The effects of synchronizing the rate of dietary energy and nitrogen supply to the rumen on the production and metabolism of sheep: Food characterization and growth and metabolism of ewe lambs given food ad libitum. Br. Soc. Anim. Sci., 69: 223-235.