Estimating Phosphorus Availability in Andosols Using Soil Biomass Phosphorus as an Indicator
ISSN | 00213551 |
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書誌レコードID(総合目録DB) | AA0068709X |
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.
刊行年月日 | |
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作成者 | SUGITO Tomoko SHINANO Takuro |
著者キーワード |
excess input of phosphorus high phosphorus retention capacity optimum phosphorus fertilizer application rate |
公開者 | Japan International Research Center for Agricultural Sciences |
オンライン掲載日 | |
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 |
巻 | 47 |
号 | 4 |
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 |