In Situ Rumen Degradability of Sesame, Groundnut and Soybean Seed cakes in Sudan

Abstract

The present experiment was carried out in August 2015 at the Animal production Research center - Kuku to determine the rumen dry matter (DM) and crude protein (C.P) degradability of sesame seed cake (SSc), groundnut cake (GNC) and soybean meal (SBM). In situ nylon bags technique was adopted using a castrated Kenana bull fitted with a rumen cannula. Five grams of each cake were weighed into the nylon bags then bags were incubated in the rumen (three bags / incubation period / cake) for 3, 6, 12, 24, 48 and72 hours.Significant (P˂0.05) differences were obtained among the oil seeds cakes for both the DM and C.P. degradability. Dry matter and crude protein disappearance (%) of soybean (SBM) was higher than those of SSC and GNC at the different incubation periods. Significant variations were found among the cakes with regard to DM rumen degradation kinetics. The lowest water soluble fraction (a)(15.4±0.77%) for DM was found in SSC followed by GNC (24.47±0.90%) and the highest value (29.03±2.16%) was observed in SBM.SSC showed significantly higher insoluble fraction (b) than GNC and SBM.GNC and SBM showed the same value for the degradation rate (c) of (b) fraction which is significantly lower than that of SSC. Significant variations were found among the three cakes for DM effective degradability at different ruminant out flow rate. The lowest water soluble fraction (a) (19.95±1.73%) for CP was found in GNC followed by SSC (20.28±1.03%) and the highest value (28.92±0.27 %) was observed in SBM. GNC showed significantly higher in soluble fraction (b) than SSC and SBM. No significant variation was observed among the three cakes at for the degradation rate (c) of fraction (b). The results of the In situ technique insesame cake, Groundnut cake and soybean cake were compared with other researchers work in the same field.