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Asian Journal of Animal Sciences

Year: 2011 | Volume: 5 | Issue: 5 | Page No.: 330-339
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Authors

T.O. Akande

A.A. Odunsi

O.S. Adedeji

Keywords

Research Article

Toxicity and Nutritive Assessment of Castor (Ricinus cummunis) Oil and Processed Cake in Rat Diet

T.O. Akande
Department of Animal Production and Health, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Oyo State, Nigeria
A.A. Odunsi
Department of Animal Production and Health, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Oyo State, Nigeria
O.S. Adedeji
Department of Animal Production and Health, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Oyo State, Nigeria
The effect of raw and processed Castor Bean Cake (CBC) and varying inclusion levels of Castor Bean Oil (CO) on performance and nutrient digestibility was evaluated in two trials involving albino rats. The first trial assessed the tolerance of albino rats to raw and lye treated CBC while trial II examined the growth response and nutrient digestibility of albino rats to varying levels of CO (0, 2.5, 5.0, 7.5 and 10.0%) in a completely randomized design. Twenty four weaned albino rats of average initial weight of about 28.18 g were used for each trial. In trial I, there was sharp decline (p<0.5) in feed intake, weight gain and efficiency of feed conversion as CBC increased. About 2.5 and 5% raw CBC was lethargic to rat but tolerated up to 10% lye treated CBC. Lye treatment reduced the active toxin in castor, lectin (ricin) by 55%. In trial II, feed intake, body weight gained feed conversion efficiency declined with increasing levels of CO in the diets and was significantly (p<0.05) depressed at 7.5%. Although, addition of castor oil to rat diet did not have damaging effect on performance and nutrient digestibility in this study, it will be safe not to exceed 7.5% inclusion of castor in diet of albino rat and that the seed should be properly deoiled before being used in animal feed. Lye treatment was potent in deactivating the toxic principle of CBC however, such product should not be applied in rat diet at concentration beyond 100 g kg-1 diet.
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Comments

Adeyeri Kenny Reply

A good paper. lots of information is require on detoxification of castor seed and its feeding value as alternative feedstuff

ogunsola jamiu babatunde Reply

An excellent paper. The information provided in this writeup has gone a long way in ameliorating the problem facing the livestock industries in meeting the protein requirement at affordable price. You are well done.

Victor Engel Reply

The document states castor is a legume. It is not. Ricinus is in Euphorbiaceae. Legumes are in Fabaceae. These are completely unrelated plant families. The approximate resemblance of the castor seeds to leguminous seeds is just that: an approximate resemblance. On close inspection, the morphology of the seeds is completely different.

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