Potential of Rhizosphere Bacteria Microcapsules Isolated from Sinabung Volcano in Stimulating Arabica Coffee Growth (Coffea arabica L.)

Coffee is one of the results commodity plantations in Indonesia that have mark quite economical​ high among​ plant plantation others and play a role important as source foreign exchange. This research used CRD (Complete Randomized Design) factorial method consisting of 2 factors, 16 treatments, 2 repetition. Data obtained analyzed with use analysis of variance. From the results study treatment best in giving microcapsules and immersion to suspension bacteria rhizosphere attached, to the microcapsules addition, results highest obtained in treatment I2 with amount microcapsules 15 g (13.64 cm) and for the lowest data in treatment I1 with amount `10 gr (11.84 cm). Best treatment results also affect the diameter of the highest diameter plant found in treatment B3 (1.64) mm and treatment lowest at B2 (1.35) mm. Research results showed that rhizosphere bacteria microcapsules from the soil of the Sinabung volcano eruption were effective in stimulating the growth of arabica coffee. Keywords: Microcapsules, Rhizosphere, Sinabung Volcano