Haematology, serum biochemistry and carcass characteristics of broiler chickens fed two varieties of cassava meal-based diets
Abstract
A 56-day study was conducted to determine the haematological profile, serum parameters and carcass characteristics of broiler chickens fed with two varieties (white and yellow) of cassava grit based diets. A total of 240, day-old unsexed Arbor acre broiler chicks were assigned to eight dietary treatments in a 2 x 4 factorial arrangement using completely randomized design. Diets were formulated to include two varieties of cassava, TME 419 (white) and TMS 01 1368 (yellow) at four inclusion levels (0, 25, 50 and 75%). Each treatment consisted of 30 birds and three replicates of 10 birds each. The haematological and serum biochemical parameters were measured at the end of the starter (4th week) and finisher (8th week) phases, while the carcass characteristics were measured at the end of the finisher (8th week) phase. At the starter phase, the PCV (40.00%), RBC count (3.37 x 1012/L), total protein (5.07g/Dl), aspartate transaminase (76.00U/L) and thiocyanate (4.17µg/ml) were highest (P < 0.05) in birds fed 75% yellow cassava grits diet. At the finisher phase, birds fed 75% white cassava grit diet had the highest (P < 0.05) PCV (40.67%), Aspartate transaminase (63.67U/L) and thiocyanate (4.70µg/ml). The white blood cell counts reduced (P < 0.05) across treatments (13.77 – 11.27 x 109/L) and (14.00 – 10.83) x 109/L) as cassava grits inclusion increased in both phases respectively. The results of carcass characteristics showed that birds fed with diet containing yellow cassava grits had the highest breast meat (14.04%) while the least value (11.49%) was obtained with birds fed the control diet. In conclusion, the substitution of maize with yellow cassava grits up to 75% improved the haematology and serum biochemistry at the starter phase, however, the white or yellow cassava grits can be substituted for maize up to 75% at the finishing phase to improve the carcass characteristics of broiler chickens.
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References
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