THE USE OF ALBIZIA FALCATARIA WITH CONDENSED TANNIN CONTENT ON IN VITRO GAS PRODUCTION AND RUMINAL FERMENTATION

Abstract

This study was aimed to evaluate Albizia falcataria with condensed tannin content in the diets on gas production and ruminal fermentation parameters. A completely randomized design (CRD) with fours treatment and five replications had applied in this study. The treatment in this study was fours combined of Brachiaria mutica and Albizia falcataria namely; R0: 60% Brachiaria mutica (BM) + 0% Albizia falcataria (AF) + 40% concentrate (CON), R1: 50% BM + 10% AF + 40% CON, R2: 40% BM + 20% AF + 40% CON and R3: 30% BM + 30% AF + 40% CON. The concentrate formulated using feed ingredients consists of 58% rice bran, 15% soybean cake meal, 30% corn, 1% salt, and 1% multivitamin minerals. The Diets samples were incubated at 39°C. The volume of gas and CH4 were recorded manually at 3, 6, 9, 12, 24, and 48 h post-incubation. Dry matter digestibility (DMD), organic matter digestibility (OMD), pH, N-ammonia (N-NH3), protozoa count, and microbial protein production (MP) were measured at 48 h post-incubation. The study showed that increased use of AF decreases (P<0.05) total gas, CH4, percentage of CH4, and increases the potency reduction of CH4. There is a negative correlation (R2= 0.81) between tannin condensed levels and CH4 production. Concentration N-NH3 and protozoa count was significantly (P<0.05) lower with the use of AF in treatment of R1, R2, R3 than R0 (without AF). As well as significantly (P<0.05) increased MP production. The study had concluded that the use of AF in the diet of R3 (30% BM: 30% AF) as a forage source reduced methane gas and N-NH3 by 62.31% and 25.73%, increasing MP, and without retarded the activity of rumen microbes.