Inclusion of Different Level Leucaena in Dairy Ration to Balance Rumen Degradable and Undegradable Protein Ratio

Abstract Sustainability use of expensive protein source in a dairy ration requires formulation based on rumen degradable and undegradable ratio (RDUP). It improves the efficiency microbial synthesis less feed residue to environment. Providing green sources such as leucaena (Leucaena leucocephala) is also an alternative. This study aimed evaluate effect RDUP with addition vitro fermentability digestibility. was conducted 4 x 3 factorial randomized block design. Factor 1 levels (R1= 60:40; R2= 55:45; R3= 50:50; R4= 45:55) factor 2 Leucaena (L1= 10%; L2= 20%; L3= 30%). The data were analyzed using ANOVA followed by Duncan test. result showed that increasing increased NH concentration dry matter Treatment L2 resulted high NH3 compared other L treatments. combination R1 L3 highest total VFA than Protozoa population ration. concluded 60:40 20% can improve ruminal fermentation