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2025 Vol.58, Issue 1 Preview Page

Original research article

Effect of organic materials on phosphorus solubilization in phosphate-accumulated soils: an incubation study
Yu-Bin Hwang1
,
Hyun-Young Hwang2
,
Nan-Hee An3
,
Sang-Min Lee3
,
Cho-Rong Lee2*
1Organic Agriculture Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, RDA, Wanju 55365, Korea
2Researcher of Organic Agriculture Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, RDA, Wanju 55365, Korea
3Senior Researcher of Organic Agriculture Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, RDA, Wanju 55365, Korea
*Corresponding Author
28 February 2025. pp. 47-58
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Abstract

Phosphorus accumulation in soil leads to soil quality degradation and yield reduction. Therefore, effective phosphorus management is essential for maintaining a sustainable agroecosystem and ensuring crop productivity. This study aimed to evaluate the effects of various organic materials on phosphate availability in phosphorus-accumulated soil, identify suitable organic materials, and determine optimal application rates for solubilizing accumulated phosphate. The materials tested including organic acid, peat moss, zeolite, sulfur, hairy vetch, rice straw, wheat bran, expeller cake, and DTPA (a chelating agent). The treatment rates were applied on a weight/weight (w/w) basis, with DTPA and distilled water serving as the controls. Soil pH, available phosphate, water-soluble phosphate, and phosphatase activity were analyzed at 0, 7, 14, and 30 days through incubation experiments. The results indicated that sulfur, expeller cake, DTPA and hairy vetch effectively reduced soil pH. Available phosphate increased by 25% and 17% compared to the control with sulfur and expeller cake, respectively. Water-soluble phosphate increased by 21% to 75% compared to the control with sulfur, rice straw (1%), zeolite, expeller cake (2%), and wheat bran (2%). Acid phosphatase activity was enhanced by organic acid (0.5%, 1%), zeolite (1%), rice straw (2%), wheat bran, and hairy vetch (0.5%, 1%, 2%). This study demonstrated that organic materials have phosphate solubilization effects comparable to DTPA.

Changes in (A) water soluble P2O5 and (B) acid phosphatase in soils with accumulated phosphate through the application of organic materials.
Keywords
Accumulated phosphate
Organic materials
Phosphatase
Phosphorus solubilization
Water soluble phosphate
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Information
  • Publisher :Korean Society of Soil Science and Fertilizer
  • Publisher(Ko) :한국토양비료학회
  • Journal Title :Korean Journal of Soil Science and Fertilizer
  • Journal Title(Ko) :한국토양비료학회 학회지
  • Volume : 58
  • No :1
  • Pages :47-58
  • Received Date : 2024-11-08
  • Revised Date : 2025-01-31
  • Accepted Date : 2025-02-17
  • DOI :https://doi.org/10.7745/KJSSF.2025.58.1.047
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