Estimating Phosphorus Availability in Andosols Using Soil Biomass Phosphorus as an Indicator

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
47-04-02.pdf229.05 KB

Andosols are widely distributed in upland fields in Japan and are characterized by a high phosphorus (P) retention capacity. Consequently, the efficiency of P fertilizers is low in Andosols, requiring a high rate of P fertilizer application. However, P resources are becoming depleted globally, and excess P accumulated in soil inhibits trace element uptake by plants, pollutes the environment, and triggers outbreaks of soil-borne diseases. Available P in upland fields in Japan is usually estimated using the Truog method, but the results do not correlate with plant P uptake in Andosols. Soil organic P is also not usually evaluated as available, but remains an important P source for plants. The P in microbes (biomass P) is particularly important, because P from dead microbes is released directly into the soil or easily decomposed. We found a significant correlation between biomass P and P uptake by kidney beans. Therefore, biomass P may serve as a reliable indicator of P availability in Andosols.

作成者 SUGITO Tomoko SHINANO Takuro

excess input of phosphorus

high phosphorus retention capacity

optimum phosphorus fertilizer application rate

公開者 Japan International Research Center for Agricultural Sciences
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
開始ページ 347
終了ページ 351
DOI 10.6090/jarq.47.347
権利 Japan International Research Center for Agricultural Sciences
言語 eng