Isolation and characterization of indigenous phosphate solubilizing bacteria from calcareous soil of dry land ecosystems in Timor Tengah Selatan, East Nusa Tenggara, Indonesia
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Abstract
Abstract. Nur MSM, Benggu YI, Tae ASJA, Ishaq LF, Soetedjo INP. 2023. Isolation and characterization of indigenous phosphate solubilizing bacteria from calcareous soil of dry land ecosystems in Timor Tengah Selatan, East Nusa Tenggara, Indonesia. Intl J Trop Drylands 7: 66-72. Phosphate Solubilizing Bacteria (PSB) is a potential biofertilizer due to its ability to increase phosphorus (P) availability. That is important, especially in areas where P availability becomes a constraint for plant growth, such as calcareous soil in Timor Island, East Nusa Tenggara, Indonesia. The study was undertaken in three ecosystems, including mamar, farm, and coastal areas in Timor Tengah Selatan, with the objective was obtaining and characterizing PSBs from these ecosystems. Five soil samples from the rhizosphere of five plants were collected from each ecosystem for PSB occurrence and soil physicochemical properties. The results showed that PSB could be found in these three ecosystems observed, with the highest types of the isolate being in the coastal area ecosystem compared to mamar and farm ecosystems. PSBs were relatively low in the three ecosystems, possibly related to the soil properties. Despite the low population of PSBs obtained, 19 isolates of PSBs were found in this study. The study results provide initial information on the occurrence of PSBs in calcareous soil Timor. This study needs to be expanded to screen and identify the PSB isolates used as biofertilizers for calcareous soil in the region.
2017-01-01