1. Aminifard, Z., A. Kiani and A. Azarfar. 2022. The Effect of Lycopene supplementation on fermentation parameters , nutrient digestibility and feed intake of fattening lamb diet in vitro and in vivo. Research on Animal Production, 13(36): 57-65 (In Persian). [
DOI:10.52547/rap.13.36.57]
2. AOAC. 2012. International. Official Methods of Analysis. 19th ed. AOAC International, Gaithersburg, MD.
3. Chibisa, G.E. and T. Mutsvangwa. 2013. Effects of feeding wheat or corn-wheat dried distillers grains with solubles in low-or high-crude protein diets on ruminal function, omasal nutrient flows, urea-N recycling, and performance in cows. Journal of Dairy Science, 96(10): 6550-6563. [
DOI:10.3168/jds.2013-6622]
4. Chumpawadee, S., K. Sommart, T. Vongpralub and V. Pattarajinda. 2006. Effects of synchronizing the rate of dietary energy and nitrogen release on ruminal fermentation, microbial protein synthesis, blood urea nitrogen and nutrient digestibility in beef cattle. Asian-Australasian Journal of Animal Sciences, 19(2): 181-188. [
DOI:10.5713/ajas.2006.181]
5. Cole, N.A. 1999. Nitrogen retention by lambs fed oscillating dietary protein concentrations. Journal of Animal Science, 77(1): 215-222. [
DOI:10.2527/1999.771215x]
6. Cole, N.A., L.W. Greene, F.T. McCollum, T. Montgomery and K. McBride. 2003. Influence of oscillating dietary crude protein concentration on performance, acid-base balance, and nitrogen excretion of steers. Journal of Animal Science, 81(11): 2660-2668. [
DOI:10.2527/2003.81112660x]
7. Collins, R.M. and R.H. Pritchard. 1992. Alternate day supplementation of corn stalk diets with soybean meal or corn gluten meal fed to ruminants. Journal of Animal Science, 70(12): 3899-3908. [
DOI:10.2527/1992.70123899x]
8. Cue, R.I. 2006. Statistical methods AEMA-610. Department of Animal Science. McGill University. 281p.
9. Czerkawski, J.W. 2013. An introduction to rumen studies. Elsevier. 246 pp.
10. de Souza, M.N., C. Bayer, M. Lassalas, G.M. Michelon, L.H. Schaitz, R. Biasiolo, M. Civiero and H.M.N. Ribeiro-Filho. 2021. Effects of ground corn and Acacia mearnsii tannin extract supplementation on nitrogen excretion and nitrous oxide emissions from sheep. Livestock Science, 246, 104458. [
DOI:10.1016/j.livsci.2021.104458]
11. Dijkstra, J., O. Oenema, J.W. Van Groenigen, J.W. Spek, A.M. Van Vuuren and A. Bannink. 2013. Diet effects on urine composition of cattle and N2O emissions. Animal, 7(s2): 292-302. [
DOI:10.1017/S1751731113000578]
12. Doranalli, K., G.B. Penner and T. Mutsvangwa. 2011. Feeding oscillating dietary crude protein concentrations increases nitrogen utilization in growing lambs and this response is partly attributable to increased urea transfer to the rumen. The Journal of Nutrition, 141(4): 560-567. [
DOI:10.3945/jn.110.133876]
13. Erickson, G.E. and T.J. Klopfenstein. 2001. Nutritional methods to decrease N losses from open-dirt feedlots in Nebraska. The Scientific World Journal, 1: 836-843. [
DOI:10.1100/tsw.2001.364]
14. Kargar, S., G.R. Ghorbani, M. Alikhani, M. Khorvash, L. Rashidi and D.J. Schingoethe. 2012. Lactational performance and milk fatty acid profile of Holstein cows in response to dietary fat supplements and forage: concentrate ratio. Livestock Science, 150: 274-283. [
DOI:10.1016/j.livsci.2012.09.015]
15. Khalilzad, H.M., T. Ghoorchi, B. Dastar and A. Toghdory. 2022. Effect of different levels substitution of Cottonseed meal with Flax meal on the ruminal fibrolytic enzyme activity and blood parameters and immune system in ewes. Research on Animal Production, 13(35): 93-99 (In Persian). [
DOI:10.52547/rap.13.35.93]
16. Khattab, I.M. and A.M. Abdel-Wahed. 2018. Effect of oscillating crude protein content on nitrogen utilization, milk production and performance of sheep. Egyptian Journal of Nutrition and Feeds, 21(2): 373-380. [
DOI:10.21608/ejnf.2018.75538]
17. Kiran, D. and T. Mutsvangwa. 2009. Nitrogen utilization in growing lambs fed oscillating dietary protein concentrations. Animal Feed Science and Technology, 152(1-2): 33-41. [
DOI:10.1016/j.anifeedsci.2009.03.009]
18. Lapierre, H. and G.E. Lobley. 2001. Nitrogen recycling in the ruminant: A review. Journal of Dairy Science, 84: E223-E236. [
DOI:10.3168/jds.S0022-0302(01)70222-6]
19. Ludden, P.A., T.L. Wechter and B.W. Hess. 2002. Effects of oscillating dietary protein on nutrient digestibility, nitrogen metabolism, and gastrointestinal organ mass in sheep. Journal of Animal Science, 80(11): 3021-3026. [
DOI:10.2527/2002.80113021x]
20. Menezes, A.C.B., S.C. Valadares Filho, M.V. Pacheco, P. Pucetti, B.C. Silva, D. Zanetti, M.F. Paulino, F.F. Silva, T.L. Neville and J.S. Caton. 2019. Oscillating and static dietary crude protein supply. I. Impacts on intake, digestibility, performance, and nitrogen balance in young Nellore bulls. Translational Animal Science, 3(4): 1205-1215. [
DOI:10.1093/tas/txz138]
21. NRC. 2007. Nutrient Requirements of Small Ruminants: Sheep, Goats, Cervids and New World Camelids. Natl. Acad. Press, Washington DC.
22. Rauch, R., J. Martín-Tereso, J.B. Daniel and J. Dijkstra. 2021. Dietary protein oscillation: Effects on feed intake, lactation performance, and milk nitrogen efficiency in lactating dairy cows. Journal of Dairy Science, 104(10): 10714-10726. [
DOI:10.3168/jds.2021-20219]
23. Reynolds, C.K. and N.B. Kristensen. 2008. Nitrogen recycling through the gut and the nitrogen economy of ruminants: an asynchronous symbiosis. Journal of Animal Science, 86(suppl_14), E293-E305. [
DOI:10.2527/jas.2007-0475]
24. Richardson, J.M., R.G. Wilkinson and L.A. Sinclair. 2003. Synchrony of nutrient supply to the rumen and dietary energy source and their effects on the growth and metabolism of lambs. Journal of Animal Science, 81: 1332-1347. [
DOI:10.2527/2003.8151332x]
25. Russell, J.B., J.D. O'connor, D.G. Fox, P.J. Van Soest and C.J. Sniffen. 1992. A net carbohydrate and protein system for evaluating cattle diets: I. Ruminal fermentation. Journal of Animal Science, 70(11): 3551-3561. [
DOI:10.2527/1992.70113551x]
26. SAS Institute, 2004. SAS 9.1 for Windows. SAS Institute, Cary, NC.
27. Souza, N.K.P., E. Detmann, S.C. Valadares Filho, V.A.C. Costa, D.S. Pina, D.I. Gomes, A.C. Queiroz and H.C. Mantovani. 2013. Accuracy of the estimates of ammonia concentration in rumen fluid using different analytical methods. Arquivo Brasileiro de Medicina Veterinaria e Zootecnia, 65: 1752-1758. [
DOI:10.1590/S0102-09352013000600024]
28. Steinfeld, H., P., Gerber, T. Wassenaar, V. Castel, M. Rosales and C. de Haan. 2006. Food and Agriculture Organization of the United Nations
29. Rome: 2006. Livestock's Long Shadow: Environmental Issues and Options. http://www.fao.org/3/a0701e/a0701e00.htm.
30. Van Keulen J.Y. and B.A. Young. 1997. Evaluation of acid-insoluble ash as a natural marker in ruminant digestibility studies Journal of Animal Science, 44(2): 282-287. [
DOI:10.2527/jas1977.442282x]
31. Van Soest, P.J., J.B. Robertson and B.A. Lewis. 1991. Methods for dietary neutral detergent fiber, and non starch polysaccharides in relation to animal nutrition. Journal of Dairy Science, 74: 3583-3597. [
DOI:10.3168/jds.S0022-0302(91)78551-2]
32. Yalchi, T., J. Seif Davati and R. Seyyed Sharifi. 2020. Effect of nutrient synchrony on ruminal fermentation, microbial protein synthesis and nitrogen balance in sheep. Iranian Journal of Animal Science Research, 12(1): 19-33 (In Persian).