References

AOAC, 1990. Official Methods of Analysis. 12th Edn., AOAC International, Washington, DC., USA., pp: 1098-1990.

Allen, M.S., 2000. Effects of diet on short-term regulation of feed intake by lactating dairy cattle. J. Dairy Sci., 83: 1598-1624.
CrossRef  |  PubMed  |  Direct Link  |  

Aquino, A.A., B.G. Botaro, F.D. Ikeda, P.H.M. Rodrigues, M.D. Martins and M.V. dos Santos, 2007. Effect of increasing dietary urea levels on milk yield and composition of lactating cows. Braz. J. Vet. Res. Anim. Sci., 36: 881-887.

Bauman, D.E., S.N. McCutcheon, W.D. Steinhour, P.J. Eppard and S.J. Sechen, 1985. Sources of variation and prospects for improvement of productive efficiency in the dairy-cow: A review. J. Anim. Sci., 60: 583-592.
PubMed  |  

Bergmeyer, H.U., 1985. Methods of Enzymatic Analysis. 3rd Edn., Vol. 9, VCH Publishers, Florida, USA., pp: 449-453.

Broderick, G.A., 2003. Effects of varying dietary protein and energy levels on the production of lactating dairy cows. J. Dairy Sci., 86: 1370-1381.
CrossRef  |  PubMed  |  Direct Link  |  

Casali, A.O., E. Detmann, S.C.V. Filho, J.C. Pereira, L.T. Heriques, S.G. Freitas and M.F. Paulino, 2008. Influence of incubation time and particles size onindigestible compounds contents in cattle feeds and feces obtained by in situ procedures. Braz. J. Vet. Res. Anim. Sci., 37: 335-342.

Castillo, A.R., E. Kebreab, D.E. Beever, J.H. Barbi, J.D. Sutton, H.C. Kirby and J. France, 2001. The effect of protein supplementation on nitrogen utilization in lactating dairy cows fed grass silage diets. J. Anim. Sci., 79: 247-253.
PubMed  |  Direct Link  |  

Cordeiro, C.F.A., M.L.A. Pereira, S.S. Mendonca, P.J.P. Almeida, L.V. Aguiar and M.P. Figueiredo, 2007. Intake and total digestibility of nutrients and milk production and composition in dairy cows fed with increasing crude protein levels in the diet with sugar cane and concentrates. Braz. J. Vet. Res. Anim. Sci., 36: 2118-2126.
Direct Link  |  

Correa, C.E.S., M.N. Pereira, S.G. de Oliveira and M.H. Ramos, 2003. Performance of Holstein cows fed sugar cane or corn silages of different grain textures. Sci. Agric., 60: 621-629.
Direct Link  |  

Costa, M.G., J.M.D. Campos, S.D. Valadares, R.F.D. Valadares, S.D. Mendonca, D.D. Sousa and M.D. Teixeira, 2005. Effects of feeding corn silage or different dietary ratios of sugarcane and concentrate on production of lactating dairy cows. Braz. J.Vet. Res. Anim. Sci., 34: 2437-2445.

Cunningham, K.D., M.J. Cecava, T.R. Johnson and P.A. Ludden, 1996. Influence of source and amount of dietary protein on milk yield by cows in early lactation. J. Dairy Sci., 79: 620-630.
PubMed  |  Direct Link  |  

Edmonson, A.J., I.J. Lean, L.D. Weaver, T. Farver and G. Webster, 1989. A body condition scoring chart for Holstein dairy cows. J. Dairy Sci., 72: 68-78.
Direct Link  |  

Erwin, E.S., G.J. Marco and E.M. Emery, 1961. Volatile fatty acid analyses of blood and rumen fluid by gas chromatography. J. Dairy Sci., 44: 1768-1771.
CrossRef  |  Direct Link  |  

Fernandes, A.M, A.C. Queiroz, J.C.J. Pereira, R.P. Lana and M.H. Pereira et al., 2003. Chemical composition of sugar cane varieties (Saccharum spp L.) with different cycles of production in three cut time. Braz. J. Vet. Res. Anim. Sci., 32: 977-985.
Direct Link  |  

Hall, M.B., 1998. Making nutritional sense of nonstructural carbohydrate. Proceedings of the 9th Florida Ruminant Nutrition Symposium, January 15-16, 1998, Gainesville, pp: 108-121.

Hoover, W.H. and S.R. Stokes, 1991. Balancing carbohydrates and proteins for optimum rumen microbial yield. J. Dairy Sci., 74: 3630-3644.
CrossRef  |  PubMed  |  Direct Link  |  

Leng, R.A. and J.V. Nolan, 1984. Nitrogen metabolism in the rumen. Symposium: Protein nutrition of the lactating dairy cow. J. Dairy Sci., 67: 1072-1089.
Direct Link  |  

Magalhaes, A.L.R., J.M.D. Campos, L.D. Cabral, R. Mello and J.A. de Freitas et al., 2006. Effects of replacing corn silage with sugarcane on production and ruminal metabolism of lactating dairy cows. Braz. J. Vet. Res. Anim. Sci., 35: 591-599.
Direct Link  |  

Magalhaes, A.L.R., J.M.D. Campos, S.D. Valadares, R.D. Torres, J.M. Neto and A.J. de Assis, 2004. Sugar cane as a substitute for corn silage in diets for milking cows: Performance and economical viability. Braz. J. Vet. Res. Anim. Sci., 33: 1292-1302.
Direct Link  |  

Mendonca, S.D., J.M.D. Campos, S.D.V. Filho, R.F.D. Valadares and C.A. Soares et al., 2004. Intake, apparent digestibility, milk production and composition and ruminal variables of dairy cows fed sugar cane based diets. Braz. J. Vet. Res. Anim. Sci., 33: 481-492.
Direct Link  |  

Mertens, D.R., 2002. Gravimetric determination of amylase-treated neutral detergent fiber in feeds with refluxing in beakers or crucibles: Collaborative study. J. AOAC Int., 85: 1217-1240.
PubMed  |  

NRC, 2001. Nutrient Requirements of Dairy Cattle. 7th Edn., National Academy Press, Washington, DC, ISBN: 978-0-309-06997-7, Pages: 405.

Nocek, J.E., 1988. In situ and other methods to estimate ruminal protein and energy digestibility: A review. J. Dairy Sci., 71: 2051-2069.
CrossRef  |  Direct Link  |  

Orskov, E.P., 1982. Protein Nutrition in Ruminants. Academic Press, New York, Pages:162.

Pereira, M.L.A., S.C.V. Filho, R.F.D. Valadares, J.M.S. Campos and M.L. Leao et al., 2005. Intake, total apparent digestibility, milk production and composition in early lactation cows fed with increasing levels of crude protein in the concentrate. Braz. J. Vet. Res. Anim. Sci., 34: 1029-1039.
Direct Link  |  

Pina, D.S., S.C.V. Filho, R.F.D. Valadares, J.M. Campos and E. Detmann et al., 2006. Intake, apparent total tract digestibility of nutrients and milk yield and composition of dairy cows fed diets supplemented with different protein sources. Braz. J. Vet. Res. Anim. Sci., 35: 1543-1551.
Direct Link  |  

Pires, A.V., I.M. Susin, F.A.P. Santos, C.Q. Mendes, R.C. Oliveira, J.J.R. Fernandes and J.M.C. Simas, 2008. Effect of starch sources and processing on performance and nitrogen metabolism in lactating Holstein cows. Braz. J. Vet. Res. Anim. Sci., 37: 1456-1462.

Pires, A.V., I.M. Susin, J.M.C. Simas, R.C. Oliveira, J.J.R. Fernandes, R.C. Araujo and C.Q. Mendes, 2010. Replacement of corn silage by chopped sugar cane and whole cottonseed on the performance of lactating Holstein cows. Braz. J. Vet. Res. Anim. Sci., 11: 251-257.

Sklan, D., R. Ashkenazi, A. Brun, A. Devorin and K. Tabori, 1992. Fatty acids, calcium soaps of fatty acids and cottonseeds fed to high yielding cows. J. Dairy Sci., 75: 2463-2472.
PubMed  |  

Slyter, L.L., L.D. Satter and D.A. Dinius, 1979. Effect of ruminal ammonia concentration on nitrogen utilization by steers. J. Anim. Sci., 48: 906-912.
CrossRef  |  Direct Link  |  

Valvasori, E., C.S.L. Lucci and J.R.P. Arcaro, 1995. of whole sugar cane and corn silage as roughage for milking cows. Braz. J. Vet. Res. Anim. Sci., 32: 224-228.

Van Soest, P.J. and V.C. Mason, 1991. The influence of Maillard reaction upon thenutritive value of fibrous feeds. Anim. Feed Sci. Technol., 32: 45-53.

Voltolini, T.V., F.A.P. Santos, J.C. Martinez, C.M.M. Bittar, H. Imaizumi and C.S. Cortinhas, 2008. Different metabolizable protein levels in sugar cane diets to lactating dairy cows. Braz. Anim. Sci., 9: 309-318.

Wu, Z. and L.D. Satter, 2000. Milk production during the complete lactation of dairy cows fed diets containing different amounts of protein. J. Dairy Sci., 83: 1042-1051.
Direct Link  |