Alagbe et al Greener Journal of Agricultural Sciences Vol. 7 (5), pp. 112-119, July 2017. ISSN: 2276-7770 Research Article Manuscript Number: 071617086 (DOI: http://doi.org/10.15580/GJAS.2017.5.071617086) Growth Response and Carcass Characteristics of Weaner Grass cutters Fed Diets Supplemented with Polyalthia longifolia Seed Oil as a Natural Growth Promoter *Alagbe J.O., Eimoga A.A. and Alagbe O.O. Dan-malafia Farms Limited, Ibadan. Abstract A 42 day feeding trial involving twenty five, seven weeks old male grass cutters with an initial weight of 604.9 – 609.7g was conducted to determine the growth response and carcass characteristics of weaner grass cutters fed diets supplemented with P. longifolia seed oil as a natural growth promoter. Five diets were formulated to contain basal diet + 0% P.longifolia oil and Oxytetracycline for T1 this served as negative control while T2 was fed basal diet containing Oxyteteracycline (synthetic growth promoter) as positive control at 25mg/kg, T3, T4 and T5 were fed basal diet supplemented with P. longifolia oil as natural growth promoter at 0.2%, 0.3% and 0.4% respectively. The grass cutters were randomly divided into five groups of five grass cutters each with each grass cutters serving as replicate in a completely randomized design experiment. Feed and clean water were provided ad libitum. There was a significant (P<0.05) differences among the treatments for final live weight, feed conversion ratio, carcass weight and dressing percentage. There was no significant differences (P>0.05) in mortality, feed intake, daily water intake, feed cost per kg and relative weights of the organs examined ( liver, kidney, heart, spleen, testis, intestine and abdominal fat). The result of this study indicates that the inclusion of P. longifolia oil up to 0.40% has no deleterious effect on the performance and health status of grass cutters. Keywords: Polyalthia longifolia oil, carcass characteristic, growth response, weaner grass cutter. Return to Content View [Full Article – PDF] [Full Article – HTML] [Full Article – EPUB] Post-review Rundown View/get involved, click [Post-Review Page] References AOAC, (1990): Association of Official Analytical Chemist Official Method of Analysis 15th Edition Washington, D.C. pages 70 -88. Al-Harthi, M.A (2002). Performance and carcass characteristics of broiler chicks as affected by different dietary types and levels of herbs and spices as non classical growth promoters. Egypt Poultry Science 22:325-343. Adu, O. A., K.A. Akingboye and A. Akinfemi (2009).Potency of pawpaw latex as an antihelmintic in poultry production. Bot. Res. Int., 2: 139-142. Alagbe, J. O (2017). 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