Isolasi dan Identifikasi Fungi Pelarut Fosfat di Bawah Tegakan Mahoni (Swietenia macrophylla), Tanjung (Mimusops elengi) dan Glodokan (Polyalthia longifolia) di Universitas Sumatera Utara

Abstract

University of Sumatera Utara campus has many types of trees scattered around the campus. Mahogany, tanjung and glodokan are the three most common tree species found in the campus area. This study aims to determine the potential of phosphate solubilizing fungi Mahogany (Swietenia macrophylla), Tanjung (Mimusops elengi) and Glodokan (Polyalthia longifolia) stands. Sampling by making 3 plots in each type measuring 20 x 20 m2 and soil depth of 0-20 cm. In each plot, 5 sampling points were made. The soil taken in each type is then composited. Soil chemical analysis which included soil pH, organic-C, available P and CEC was carried out on the soil samples obtained. Isolation of phosphate solubilizing fungi was carried out using Pikovskaya media. Based on the results of the study, the total average population of phosphate-solubilizing fungi under the mahogany stand was 40.72 X 104 CFU/mL, under the headland was 21.53 X 104 CFU/mL, and under the glodokan was 31.12 X 104 CFU/mL. Isolation obtained 12 (twelve) isolates of phosphate solubilizing fungi capable of forming clear zones. The identification results found 2 genera of phosphate solubilizing fungi namely Aspergillus and Penicillium.