UTILIZATION OF JACKBEAN (<I>Canavalia ensiformis</I> L., DC) AS A PROTEIN SOURCE IN BROILER RATIONS
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Abstract
The nutritive value and the potential use of jackbean (Canavalia ensiformis L., DC.) as a protein source substituted for soybean meal were investigated. Ground jackbean was incorporated at three levels, 0, 10, 15 and 20% in rations containing 21%, 19% and 17% crude protein for broilers aged; 1-3, 3-6 and 6- 7 weeks, respectively. One hundred twenty heads of 7 day old broilers (strain A.A707) were allocated to 4 treatments, each with 3 replicates raised on a floor pen. Ad libitum feed and drinking water were allowed by freely access.
Jackbean contained as percentage of dry matter seed 25.7% CP, 3.0% EE, 10.7% CF, 57.1% NFE and 22.9 mg N / g / min. of urease activity which is higher than raw pigeon pea and raw soybean seed (7.78 and 5.70 mg N / g / min of urease activity respectively). The trypsin inhibitor content is lower than the other two leguminous seeds mentioned above (13.73 vs 30.30 and 74.32 mg TI / g air dry sample, respectively). The results from feeding trial indicated that growth rate and feed consumption decreased, while pancreas weight increased with the increasing level of jackbean. At 10% jackbean, weight gain and feed consumption differ not significantly from the control (1.63 and 3.59 kg vs. 1.70 and 3.81 kg, respectively). Feed conversion ratio (FCR) of those obtained 0-15% jackbean was found between 2.21-2.27, but the group of 20% jackbean had significantly higher FCR than the control (P <0.05). However no significant difference was found on mortality rate among groups.
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References
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