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박명수,석영선,정종배,안기섭,사동민,Park, Myung-Su,Singvilay, Olayvahn,Seok, Yeong-Seon,Chung, Jong-Bae,Ahn, Ki-Sup,Sa, Tong-Min Korean Society of Soil Science and Fertilizer 2003 한국토양비료학회지 Vol.36 No.4
The effect of phosphate solubilizing microbes (PSM) on plant P uptake and growth in rock phosphate applied soil was tested under a greenhouse condition. Tobacco plants were grown in nonsterilized soil inoculated with Penicillium oxalicum CBPS-3F-Tsa with or without rock phosphate application as P fertilizer. Phosphorus concentration in tobacco plants was increased by the application of rock phosphate, while inoculation of soil with fungi further significantly increased P concentration in tobacco plants compared with the noninoculated treatments. Phosphorus uptake by tobacco plants was also increased by the application of rock phosphate and PSM inoculation, and the significant comparison has been made with single rock phosphate treatment. Growth of tobacco plant was also significantly increased in the treatments receiving rock phosphate, while the combined application of rock phosphate and PSM further increased plant growth. It was concluded that the positive effect of PSM inoculation on plant growth was closely related in plant P content and uptake. These results suggest that Penicillium oxalicum CBPS-3F-Tsa could solubilize insoluble soil phosphates and rock phosphate which can promote growth and P uptake of tobacco plants. 인광석을 처리한 토양에서 인산 가용화균 Penicillium oxalicum CBPS-3F-Tsa이 식물의 인산 흡수와 생육에 미치는 효과를 온실조건에서 조사하였다. 인광석을 처리한 토양에서 담배 식물체중의 인산 농도는 증가하였으며, 인산 가용화균을 접종한 경우에는 인산 농도가 더욱 증가하였다. 식물체의 총 인산 흡수량도 인산 가용화균을 접종한 경우 증가하였다. 담배 식물의 생육 또한 인광석과 인산 가용화균을 동시에 처리한 경우 인광석만 처리한 경우에 비하여 통계적으로 유의성 있게 증가하였는데, 이러한 인산 가용화균의 생육 촉진 효과는 인산 흡수에 미치는 영향과 밀접한 관계를 보였다. 따라서 인산 가용화균과 인광석 처리에서 나타난 식물의 인산 흡수량 및 생육 증대 효과는 결국 접종한 인산 가용화균에 의한 난용성 인광석의 가용화에 따른 결과로 판단된다.