Estimating Phosphorus Availability in Andosols Using Soil Biomass Phosphorus as an Indicator
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- SUGITO Tomoko
- Agro-environmental Research Division, NARO Hokkaido Agricultural Research Center
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- SHINANO Takuro
- Agro-environmental Research Division, NARO Hokkaido Agricultural Research Center
Abstract
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.
Journal
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- Japan Agricultural Research Quarterly: JARQ
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Japan Agricultural Research Quarterly: JARQ 47 (4), 347-351, 2013
Japan International Research Center for Agricultural Sciences
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Keywords
Details 詳細情報について
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- CRID
- 1390001204701026944
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- NII Article ID
- 130004564840
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- ISSN
- 21858896
- 00213551
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed