AUTHOR: AKWUKWAEGBU, SIMON EGBULE (MSc)
DEPARTMENT: ANIMAL SCIENCE AND TECHNOLOGY
AFFILIATION: FEDERAL UNIVERSITY OF TECHNOLOGY OWERRI
Two experiments were conducted to determine the substitution value of beniseed cake for soyabean meal in starter and finisher broiler diets. Mechanically expelled beniseed seed cake was used to formulate broiler starter and finisher diets such that in experiment 1 (starter phase) beniseed cake replaced soyabean meal at 0%, 33.3%, 66.7% and 100% of the diets. In experiment 2 (finisher phase) the cake replaced soybean meal at 0%, 40%, 80% and 100% of the broiler diets. 28-days experimental trials were conducted in which the formulated starter and finisher diets were tested on control diet T1 (0% beniseed seed cake). Average daily feed intake during the starter phase were 57.3, 79.3, 79.3 and 61.4g/bird respectively for birds fed the 0%, 33.3%, 66.7% and 100% SBM replacement diets. The average daily weight gains were 24.13g, 25.84g, 23.84g and 19.44g for birds fed the 0%, 33.3%, 66.7% and 100% SBM replacement diets respectively. The feed conversion ratio for birds on the treatment diets T1, T2, T3 and T4 were 2.38, 3.07, 3.33 and 3.16 respectively. The feed conversion ratio for birds on diets T2 – T4 were significantly (p<0.05) different from birds on the control diets T1. The cost of production (N/Kg gain) decreased as the level of beniseed increased. The cost saving (%) increased suggesting that the replacement of soyabean meal with beniseed cake at the various treatment levels was economical. The live weight gain during the finisher phase were (1.83 kg, 1.90 kg, 1.87 kg and 1.83 kg/bird). The abdominal fat was high in birds on beniseed diets T2 – T4 (2.05, 2.94 and 2.02) %compared to T1. The neck was almost similar (4.15%, 4.32, 4.33 and 4.43%) for T1 – T4. The average daily feed intake of the treatment groups were 123.4g, 128.7g, 120.8g and 107.4g respectively for birds fed diets T1, T2, T3 and T4. The average daily weight gain for the groups were 49.46g, 49.8g, 47.6g, and 45.5g for birds fed diets T1, T2, T3 and T4 respectively. The average total body weight gain for the groups were 1385g, 1393g, 1334g and 1274g while feed conversion ratio for groups were 2.50, 2.59, 2.54 and 2.36 respectively. Birds on diets T2 and T3 differed significantly (p<0.05) in feed conversion ratio from birds on diet T1 (control) and T4. The feed cost (N/Kg) decreased (84.74, 71.76, 58.6, and 52.32). The cost saving (%) increased. (15.3%, 30.83% and 38.24%). The results of study tend to suggest that beniseed cake could successfully replace 33.3%, 66.7% soyabean meal in broiler starter diets as well as 40%, 80% and 100% soyabean meal in broiler finisher diets.
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