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

• SUGITO Tomoko

  Agro-environmental Research Division, NARO Hokkaido Agricultural Research Center

• SHINANO Takuro

  Agro-environmental Research Division, NARO Hokkaido Agricultural Research Center

抄録

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.

収録刊行物

• Japan Agricultural Research Quarterly: JARQ

  Japan Agricultural Research Quarterly: JARQ 47 (4), 347-351, 2013

  国立研究開発法人　国際農林水産業研究センター

キーワード

• excess input of phosphorus
• high phosphorus retention capacity
• optimum phosphorus fertilizer application rate

詳細情報

• CRID: 1390001204701026944
• NII論文ID: 130004564840
• DOI: 10.6090/jarq.47.347
• ISSN: 21858896
• ISSN: 00213551
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可