Performance of layers fed toasted, boiled or boiled and soaked castor oil seed meal (R. Communis)

Abstract

SUMMARYA feeding trial was conducted to investigate the response of Isa Brown laying hens to three different methods of processing castor oil seed meals (CSM); toasting, boiling and boiling-andsoaking for using as total substitute for soybean meal. Two hundred, 75-week old laying birds were randomly assigned to four experimental diets in a completely randomized design experiment. The control diet (CD) contained 19.10 % soybean; the proportion of soybean in the CD (T 1 ) was replaced completely with toasted, boiled and boiledand-soaked castor oil seed meal in diets T 2 , T 3 and T 4 respectively. Chemical analysis showed that treatment methods did not have any significant (p>0.05) effect on the dry matter (DM), crude fibre (CF), ether extract (EE), ash, nitrogen free extract (NFE) and gross energy of the meal. However, the crude protein value of the toasted meal (24.55 %) decreased (p<0.05) significantly as compared to the other two treatment methods. Toasted method also retain significantly (p<0.05) higher level of ricin value (0.21 mg/100 g) when compared to boiling (0.09 mg/100 g) and boiling-and-soaking (0.03 mg/100 g). Birds on the control diet, T 3 and T 4 had numerically (p>0.05) similar values of final live weight, weight gain, feed conversion ratio and hen day production that were significantly (p<0.05) favorable than birds on T 2 . Birds on T 2 also had significantly (p<0.05) depressed liver weight (2.11 %) as compared to birds on the control diet (2.87 %). Haemoglobin (Hb) values also showed a significant decrease (p<0.05) in birds on T 2 (2.23 g/dL) than that of birds on the control (10.67 g/dL), T 3 (10.11 g/dL) and T 4 (10.35 g/dL). Birds on T 2 equally had a significantly (p<0.05) decreased RBC (154.33 x103 ) in relation to the control diet (288.02 x103 ).The egg quality parameters were not significantly (p>0.05) affected by the test ingredient apart from promoting lighter egg yolk coloration. The study showed that boiled and boiled-and-soaked CSM can totally replace soybean meal in layers diet without any adverse effect on egg production, external and internal egg qualities, except encouragement of lighter yolk coloration. Boiling-and-soaking however, as a processing method had no special advantage in terms of egg production parameters and egg quality parameters, hence the additional task of soaking after boiling was unnecessary. Boiling of castor oil seed for 40 minutes is therefore preferred among the treatment methods. As an industrial waste, CSM incorporation in layer diets as a feed ingredient especially for large scale operations would results in substantial cost savings. RESUMENUn ensayo de alimentación fue realizado para investigar la respuesta de gallinas ponedoras Isa Brown a tres métodos diferentes de procesamiento de las semillas de ricino (CSM); que son tostado, hervido y hervido humedecido para usarlos como sustitutos totales de la harina de soja. Doscientas gallinas ponedoras de 75 semanas ADDITIONAL KEYWORDS Egg quality. Layers. Processing. Ricin. PALABRAS CLAVE ADICIONALESCalidad ...

Growth Performance of the African Catfish, Clarias gariepinus (Burchell), Fed Varying Inclusion Levels of Castor Seed (Ricinus communis L.)

“…This could be attributed to leaching of nutrients and softening of seed testa as temperature level increased. This submission corroborates the findings of [32] in the boiled castor seeds included in the diet of layer birds. The fat and fiber contents of the experimental diets however did not exceed 6% as recommended by Annune et al [33].…”