Types and potential of phosphate solubilizing fungi in soil under three dominant stands at the Universitas Sumatera Utara campus
D Elfiati1,2*, A Susilowati1,2, A B Rangkuti 1,2, M Panjaitan1, F G Dwiyanti3, S H Larekeng4, M Riniarti5

1 Faculty of Forestry, Universitas Sumatera Utara, Medan, Indonesia
2JATI-Sumatran Forestry Analysis Study Centre, Medan, Indonesia
3 Faculty of Forestry, IPB University, Bogor, Indonesia
4 Faculty of Forestry, Universitas Hasanuddin, Makasar, Indonesia
5Faculty of Agriculture, Universitas Lampung, Lampung, Indonesia

Abstract

Phosphate solubilizing fungi play an important role in helping to increase the availability of phosphorus nutrient in the soil. Phosphorus is one of the essential nutrients for plant growth. The campus of the Universitas Sumatera Utara is planted with various types of trees scattered around the campus. Switenia macrophylla, Mimusops elengi and Polyalthia longifolia are the three most common tree species in the camous area. This study aims to obtain the types and potential of phosphate solubizing fungi found under the stands of the three types of plants. Soil samples were taken compositely in the rhizospehere of plants with a depth 0-20 cm. Isolation of phosphate solubilizing fungi was carried out using Pikovskaya media. The types of phosphate solubilizing fungi was obtained by morphological identification to the genus level, while the potency was measured qualitatively by calculating the phosphate dissolving index. The isolation results obtained a total of 12 isolates of phosphate solubilizing fungi (4 isolates were isolated from each stands). Based on morphological identification, the twelve isolate belong to 2 genera, namely Aspergillus and Penicillium. The results of the calculation of the phosphate dissolution index range from 1.17 to 1.29.

Keywords: Mimusops elengi, Phosphate solubilizing fungi, Polyalthia longifolia, Swietenia macrophylla

Topic: Topik E: Biodiversity and ecotourism