Main content area

Rolfe (Daniellia oliveri) seed meal as a protein source in locally produced concentrates for lambs fed low quality basal diet

Okunade, Sunday Adewale, Olafadehan, Olurotimi Ayobami
Journal of the Saudi Society of Agricultural Sciences 2019 v.18 no.1 pp. 83-88
Daniellia oliveri, acetates, ammonium nitrogen, average daily gain, body weight, carbohydrates, digestibility, digestible protein, energy, excretion, feed conversion, feed intake, growth performance, lambs, methane production, nitrogen, organic matter, pH, peanut cake, propionic acid, protein sources, protein synthesis, rumen, rumen fermentation, tannins, volatile fatty acids
The objective of this study was to determine the effects of replacing different levels of toasted Daniellia oliveri seed meal (TDS) for groundnut cake (GNC) in the diets of fifteen growing 8-month-old ram-lambs (13±0.25kg body weight (BW)) on growth performance, nutrient digestibility, nitrogen utilization and ruminal fermentation. The animals were randomly assigned to one of three diets containing 0g/kg TDS, 100g/kg TDS and 200g/kg TDS to replace 0, 50 and 100% of GNC (on dry matter basis) in a complete randomized design. Intakes of total dry matter (DM), digestible crude protein (DCP) and digestible organic matter (DOM), DOM, DCP, energy concentration, N retention, purine derivatives excretion, microbial protein synthesis (P<0.01) and propionate (P<0.05) increased linearly with increasing level of TDS. Intakes of fibre, feed conversion ratio, total N excretion, ruminal pH and NH3-N, total volatile fatty acids, acetate, acetate-to-propionate ratio and methane production progressively declined (P<0.01), as the TDS level increased. Whereas, intakes of concentrate, non-fibre carbohydrates, condensed tannins and energy, digestibilities of DM, CP and OM, average daily gain, digestible organic matter fermented in the rumen (P<0.01) and valerate (P<0.05) increased linearly and quadratically, roughage intake and fibre digestibility decreased linearly and quadratically (P<0.01). Results indicate that inclusion of 200g/kg TDS (100% replacement of GNC) improved feed intake, nutrient digestibility, N utilization, ruminal fermentation and growth performance of lambs.