OLUBAJO, AYOMIDE SAMSON2026-01-052026-01-052024-08-12https://ir.funaab.edu.ng/handle/123456789/459A PROJECT REPORT SUBMITTED TO THE COLLEGE OF ANIMAL SCIENCE AND LIVESTOCK PRODUCTION, IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE AWARD OF BACHELOR OF AGRICULTURE (B. AGRIC.) DEGREE OF THE FEDERAL UNIVERSITY OF AGRICULTURE, ABEOKUTA, OGUN STATE, NIGERIAABSTRACT This research was conducted to evaluate the effect of Azadirachtaindica inclusion on chemical composition and in-vitro gas production of Megathyrsus maximus – Leucaena leucocephala leaf meal. The experiment was laid in a complete randomized design with 8 treatments of varying levels of Azadirachtaindica inclusion as Megathyrsus maximus 100%, Megathyrsus maximus 70% + Leucena leucocephala 30%, Megathyrsus maximus 70% + Leucaena leucocephala 25% + Neem 5%, Megathyrsus maximus 70% + Leucena leucocephala 20% + Neem 10%, Megathyrsus maximus 70% + Leucena leucocephala 15% + Neem 15%, Megathyrsus maximus 70% + Leucena leucocephala 10% + Neem 20%, Megathyrsus maximus 70% + Leucena leucocephala 5% + Neem 25%, Megathyrsus maximus 70% + Leucena leucocephala 0% + Neem 30%. Data collected were subjected to one ways analysis of variance and the treatment means was separated using Duncan’s Multiple Range Test using SAS. Result showed that dry matter content was significantly higher across all feed treatment. However, feed meal containing Megathyrsus maximus 70% + Leucena leucocephala 30% (TN2) and Megathyrsus maximus 70% + Leucena leucocephala 25% + Neem 5% (TN3) had significantly (p<0.05) the highest crude protein (14.87% and 13.84%), ether extract (9.70% and 9.77%), and the least Neutral detergent fibre (42.95% and 42.90%) compare to other feed treatment. Feed meal containing Megathyrsus maximus 70% + Leucena leucocephala 30% (TN2) and Megathyrsus maximus 70% + Leucena leucocephala 25% + Neem 5% (TN3) had significantly (p<0.05) highest gas production across the incubation period compare to the least gas volume recorded in recorded in control feed (Megathyrsus maximus 100% (TN1)). In contrary, control feed (Megathyrsus maximus 100% (TN1)) had the highest methane gas production (6.10 ml/g DM) at the ends of 24 hours of incubation. However, feed meal containing Megathyrsus maximus 70% + Leucena leucocephala 30% (TN2) and Megathyrsus maximus 70% + Leucena leucocephala 25% + Neem 5% (TN3) also recorded high methane gas production 5.60 ml/g DM and 4.20 ml/g DM respectively compare to 1.80 ml/g DM recorded in feed meal containing Megathyrsus maximus 70% + Leucena leucocephala 5% + Neem 25% (TN7) and Megathyrsus maximus 70% + Leucena leucocephala 0% + Neem 30% (TN8). carbon dioxide (CO2) was significantly (p<0.05) highest in feed meal containing Megathyrsus maximus 70% + Leucena leucocephala 25% + Neem 5% (TN3) and Megathyrsus maximus 70% + Leucena leucocephala 20% + Neem 10% (TN4) with 13.40 ml/genThesis