인공습지 식생 선택을 위한 인산 가용화 미생물 활성 분석

This study evaluated phosphate-solubilizing microorganism (PSM) activity in rhizospheric soils of five macrophyte species to establish a biological criterion for plant selection in constructed wetlands. Declining phosphorus removal efficiency in a test-bed hybrid CW treating wastewater effluent indicated the need for functional improvement. Rhizospheric soils from Pennisetum alopecuroides, Hosta longipes, Iris pseudacorus, Lythrum anceps, and Phragmites australis were cultured on Pikovskaya's agar, and the Phosphate Solubilization Index (PSI) was calculated. Results showed H. longipes had the highest PSI (3.43 ± 0.86), while P. australis had the lowest (2.59 ± 0.17). PSI effectively distinguishes rhizospheric microbial activity among species, providing a biological basis for selecting high-PSI plants to enhance phosphorus cycling and treatment performance in constructed wetlands.