EFFECT OF SUPPLEMENTARY LYSINE ON PERFORMANCE AND CARCASS CHARACTERISTICS OF GROWER RABBITS FED COTTON SEED BASED DIETS

S. B. Abdu, A. Musa, M. R. Hassan, J. K. Alli-Balogun, Y. Braimah, M. A. Mijinyawa, A. U. Musa

Abstract


A study was conducted to evaluate the possibility of feeding varying levels of lysine to a cotton seed meal (CSM) based diet. Twenty five rabbits of mixed breeds and sexes were used in a completely randomized design for this study. The rabbit were divided into 5 treatments groups, with 5 rabbits replicated per group in a completely randomized design. Five isonitrogenous experimental treatment diets were formulated with different inclusion levels of lysine. Diet 1, the control diet, had no CSM. Diets 2 to 5 had 25% CSM each, with a supplemental lysine content of 0, 0.6, 0.8 and 1%, respectively. The performance of rabbits fed CSM based diets containing varying levels of lysine showed significant (P<0.05) difference in the parameters studied. The control had the highest weight gain. While rabbits fed CSM based diet with 0% inclusion of lysine had the lowest weight gain. Average daily weight gain, showed no significance difference (P>0.05) between treatment groups fed lysine supplemented CSM based diets, having average daily weight gain ranging from 6.35g to 7.05g compared to the  rabbits fed CSM based diet with no lysine supplementation recording 4.60g. The result of the feed conversion ratio (FCR) showed that the control diet had significantly (P<0.05) better FCR of 5.59, while the CSM based diet with no lysine supplementation had poorer FCR (8.79).  The result of the slaughter weight showed rabbits fed the control diet had significantly (P<0.05) higher weight, when compared with those on the CSM based diets. Cut parts (chest, loin and thigh) were significantly (P<0.05) higher in the control group, while those fed CSM based dietswith no lysine supplementation had the least. The result of the cost analysis showed an increase in the price of the diet with increase in the level of lysine, from N45.10 to N50.60/kg. Apparent profit of the control group fed on non CSM based diet was better (N30.57), while those fed the CSM based diet without lysine supplementation yielded a negative apparent profit (˗˗N23.56). Supplementation with lysine resulted in an apparent profit of N2.51. Also increasing the level of lysine resulted in an increase in the apparent profit of N9.92 at 1.0% lysine inclusion. From the result of this study, it can be recommended that when CSM based diet is to be fed, supplementary lysine should be included in the diet of rabbits. Increasing the level of lysine up to 1% has a significant effect on the performance of rabbits and income accruing to the farmers, when feeding CSC based diet to rabbits.

Keywords


Cottonseed cake, Cost, Lysine, Performance, Rabbits

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References


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