The effects of leguminous supplementation on ammoniated rice straw based completed feed on nutrient digestibility on in vitro microbial protein synthesis

Abstract

Abstract Legume is the best source of protein to ruminant. Tannin content in legumes can provide protein by pass for ruminant. This study was conducted to determine the effect supplementation of legumes (Leucaena leucocephala) as substitute of concentrate on nutrient digestibility and microbial protein synthesis of the completed feed based on ammoniated rice straw. The study was conducted in an in vitro used a randomized block design where there were 3 treatments dan 5 replications. The treatments were A. 40% ammoniated rice straw + 60% concentrate, B. 40% ammoniated rice straw + 50% concentrate + 10% Leucaena leucocephala, C. 40% ammoniated rice straw + 40% concentrate +10, + 20% Leucaena leucocephala. The results showed that the addition of of Leucaena leucocephala had increased the digestibility of DM, OM, CP and microbial protein synthesis (p< 0.05). Increased doses of Leucaena leucocephala until 20% decreased digestion of nutrition compared with dose 10% but was still higher than control. In conclusion, the supplementation of Leucaena leucocephala on completed feed based on ammoniated rice straw in vitro can increase nutrient degradability. Supplementation of 10% and 20% Leucaena leucochepala were suitable to be used for further studies, therefore in vivo experiment is required to study the effects on animal production.