Effect of Condensed Tannin and Myristic Acid in Corn Straw-Based Complete Feeds on NH3 Concentration and Microbial Protein Synthesis

This study aimed to determine the effect of condensed tannin (CT) and myristic acid in corn straw-based complete feed on NH 3 concentration and in vitro synthesis of microbial protein. The materials used in this study were corn straw, CT, myristic acid, coffee husk rice bran, soybean meal, copra meal, and palm kernel meal. The method used for this research was an experiment in the laboratory using Randomized Block Design (RBD), which consisted of four treatments and three replications. The treatments in this study were T1 (complete feed (40% corn straw + 60% concentrate), T2 (complete feed (40% corn straw + 60% concentrate) + CT 30 g/kg DM + myristic acid 20 g/kg DM), T3 (complete feed (40% corn straw + 60% concentrate) + CT 30 g/kg DM + myristic acid 30 g/kg DM), and T4 (complete feed (40% corn straw + 60% concentrate) + CT 30 g/ kg DM + myristic acid 40 g/kg DM). The results showed that the addition of CT and myristic acid in the complete feed had no significant effect (P>0.05) on NH 3 concentration. It could be concluded that the addition of CT and myristic acid could increase the nutrient content of the feed. Also, the addition level of CT 30 g/kg DM and myristic acid 40 g/kg DM (T4) gave the best result on synthesis protein microbial efficiency and NH 3 concentration.