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PERFORMANCE RESPONSE, CARCASS EVALUATION AND ECONOMIC BENEFIT OF RABBITS FED SORGHUM OFFAL-BASED DIETS
Ogunsipe, MH; Agbede, JO & Adedeji, OA
Abstract
An eight-week feeding trial was conducted to investigate the performance, carcass
quality, haematological indices and economics of production of rabbits fed dietary
sorghum offal substitute for maize grain. A total of forty (40) weaned rabbits with a
mean weight range of 820-850 g were randomly distributed to five treatment diets
where 0, 25, 50, 75 and 100% of sorghum offal replaced maize grain in the gross feed
composition to give Diets 1 (control), 2, 3, 4 and 5, respectively. Each treatment diet
was replicated eight times with a rabbit taken as a replicate. The determined chemical
composition of the experimental diets ranged between 17.12% and17.43% for crude
protein (CP), 11.48 and 14.89% for crude fibre (CF), 5.04 and 7.74% for ether extract
or fat (EE), 54.17 and 56.41% for nitrogen free extract (NFE) and 3069.35kcal/kg to
3241.17ME(kcal/kg). While the results on performance showed no significant
difference (P>0.05) in feed intake by rabbits fed the five test diets, there appeared to
be significant decrease (P<0.05) in the weight gain and feed conversion ratio of
rabbits fed 50 to 100% sorghum offal-based diets. Carcass cuts that showed
significant reduction (P<0.05) at 75 and 100% sorghum offal-based diets are the
carcass weight, thigh, loin, shoulder and ribs weights. Organs such as liver, kidney,
heart and pancreas weights measured were significantly higher (P<0.05) at 75 and
100% sorghum offal-based diets. Haematological profile such as Packed Cell Volume
(PCV), Red Blood Cells (RBC), White Blood Cells (WBC), Mean Cell Volume
(MCV) and White Blood Counts such as neutrophil and basophil showed significant
difference (P<0.05) at 75% and 100% sorghum offal-based diets. The serum
metabolites such as albumin, globulin, cholesterol and urea showed a similar trend of
significant difference (P<0.05) at 75% and 100% sorghum offal inclusion compared
to other test diets. For economic production, the study revealed an optimum inclusion
of sorghum offal at 50% (24.60 g/kg in feed composition) for maize grain in rabbit
concentrate feed is possible. Above this level, a loss of ₦23.17 and ₦13.16 was
recorded as evidenced by the cost differential and benefit cost analysis.
Keywords
Performance; Haematology; Serum; Sorghum offal; Rabbit
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