Effects of protein levels in total mixed rations on growth performance of wool sheep in Royal Agricultural Station Inthanon
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Abstract
The objective of this research was to measure growth performance of wool sheep that were fed by different levels of crude protein in the Royal Agricultural Station Inthanon. The experiment was designed according to a completely randomized design (CRD). The experimental diets were 14% crude protein total mixed rations (14 %CP TMR), 16% crude protein total mixed rations (16 %CP TMR) and 18% crude protein total mixed rations (18 %CP TMR). The total mixed rations samples were collected and analyzed for chemical composition by proximate analysis and detergent method. Twenty-four wool sheep, averaging 264 ± 9 days old and 26.22 ± 3.24 kg body weight were arrangement to receive 3 dietary treatments in growth performance study. Feed intake (FI), average daily gain (ADG), body weight gain (BWG), feed conversion ratio (FCR), protein efficiency ratio (PER) and feed cost per gain (FCG) were recorded for 3 months. The results revealed that the BWG ADG and FCR of wool sheep fed 14, 16 and 18% CP TMR were not significant (P>0.05). However, wool sheep fed 14% CP TMR had the lowest feed cost and FCG. It is concluded that 14% CP TMR was optimal level for wool sheep.
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References
Crook, B.J., R.A. Farrell, R.S. Hegarty, and I.W. Purvis. 2000. Dietary Protein and the Discolouration of Wool from Superfine Merino sheep. Asian-Australasian Journal of Animal Sciences. 13(Suppl. C):164-167
Dabiri, N., and M.L. Thonney. 2004. Source and level of supplemental protein for growing lambs. Journal of Animal Science. 82: 3237-3244.
Estra-Angulo, A., B.I. Castro-Péreza, J.D. Urías-Estrada, F.G. Ríos-Rincón, Y.J. Arteaga-Wences, A. Barreras, M.A. López-Soto, A. Plascencia, and R.A. Zinn. 2018. Influence of protein level on growth performance, dietary energetics and carcass characteristics of Pelibuey×Katahdin lambs finished with isocaloric diets. Small Ruminant Research. 160: 59-64.
Haddad, S.G., R.E. Nasr, and M.M. Muwalla. 2001. Optimum dietary crude protein level for finishing Awassi lambs. Small Ruminant Research. 39: 41-46.
Javaid, A., Mahr-un-Nisa, M. Sarwar, and M.A. Shahzad. 2008. Ruminal characteristics, blood pH, blood urea nitrogen and nitrogen balancein Nili-Ravi buffalo (Bubalus bubalis) bulls fed diets containing various levels of ruminally degradable protein. Asian-Australasian Journal of Animal Sciences. 21: 51–59.
Wunjan, J, S. Yammuen-art, and T. Moonmanee. 2019. Effects of protein levels in total mixed rations on productive performance of male dairy goats. Khon Kaen Agriculture Journal. 47 (Suppl. 2) : 742 – 746. ( In Thai)
Kaya, I., Y. Unal, T. Sahin, and D. Elmali. 2009. Effect of different protein levels on fattening performance, digestibility and rumen parameters in finishing lambs. Journal of Animal and Veterinary Advances. 8: 309-312.
NRC. 1985. Nutrient Requirement of Sheep. 6th ed. National Academy Press, Washington, DC.
Poser, H., L Semplicini., GM De Benedictis,, G. Gerardi, B Contiero, N. Maschietto, E. Valerio O. Milanesi, A. Semplicini, and D. Bernardini. 2013. Two-dimensional, M-mode and Doppler-derived echocardiographic parameters in sedated healthy growing female sheep. Lab Animal. 47(3): 194-202
Steel, R.G.D., and J.H. Torrie. 1980. Principles and Procedures of Statistics. A Biometrical Approach. 2nd Edition. M.C. Graw-Hill Book Co., New York.
Sultan, J.I., A. Javaid, and M. Aslam. 2010. Nutrient digestibility and feedlot performance of lambs fed diets varying protein and energy content. Tropical Animal Health and Production. 42: 941-946.
Zinn, R.A., and Y Shen. 1998. An evaluation of ruminally degradable intake protein and metabolizable amino acid requirements of feedlot calves. Journal of Animal Science.76: 1280-1289.