Utilisation of raw jackbean (Canavalia ensiformis) and jackbean fractions in diets for broiler chicks

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Abstract
1. An experiment was conducted to examine the effectiveness of some extraction procedures at eliminating the antinutritional properties of jackbean to the broiler chicken. The most pronounced effects were observed in the base‐ and acid‐soluble protein fractions (BSP and ASP) which contained the bulk of the antinutritional factors. 2. The growth of chickens on all diets were significantly (PPPP<0.01), but serum protein and albumin concentrations were depressed while uric acid was not influenced by dietary treatment. 5. Histopathological examination revealed several pathological lesions in organs of chicks fed on the BSP, ASP, DJB and RJB diets. The presence of lesions was less marked in the organs of chickens fed on diets containing base‐insoluble residue (BIR), acid‐insoluble residue (AIR) and ethanol‐extracted meal (EEM), while those given the aqueous heated jackbean diet did not show any pathological effects.

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