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Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
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Pteris vittata plantation decrease colloidal phosphorus contents by reducing degree of phosphorus saturation in

Sangar Khan1, Paul J Milham2, Kamel Mohamed Eltohamy3

  • 1Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Sciences, Zhejiang University, Hangzhou, 310058, China.

Journal of Environmental Management
|December 5, 2021
PubMed
Summary

Pteris vittata plantation effectively reduces colloidal phosphorus (Pcoll) release from manure-amended soils. This approach lowers phosphorus loss risk and enhances soil P bioavailability, benefiting plant growth.

Keywords:
ColloidsIncubationLangmuir isothermPhosphorusPoultry manureSoil

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Area of Science:

  • Environmental Science
  • Soil Science
  • Agricultural Science

Background:

  • Manure fertilizer application increases soil phosphorus (P) saturation.
  • This saturation elevates the risk of colloidal P (Pcoll) release into aquatic ecosystems.
  • Colloidal P can contribute to eutrophication and environmental degradation.

Purpose of the Study:

  • To investigate the efficacy of Pteris vittata plantation in reducing Pcoll content in soils amended with manure.
  • To assess the impact of P. vittata on P adsorption and the degree of P saturation (DPS) in different soil types.
  • To determine the relationship between soil properties and Pcoll concentrations with and without P. vittata.

Main Methods:

  • Two experiments were conducted using Cambisol and Anthrosol soils.
  • Soils were amended with varying rates of manure P (0-50 mg P kg⁻¹).
  • Pteris vittata was planted in experimental plots; Pcoll, soil minerals, organic carbon, Mehlich-3 nutrients, and DPS were measured.

Main Results:

  • P. vittata significantly decreased Pcoll content in both Cambisol and Anthrosol soils compared to unplanted soils.
  • P. vittata increased P adsorption and reduced DPS, thereby lowering Pcoll release and P loss risk.
  • P fractions (NaOH, NH4F, HCl-P) in planted soils increased the P pool, enhancing Pcoll bioavailability and P. vittata biomass.

Conclusions:

  • Pteris vittata plantation is an effective strategy for mitigating colloidal phosphorus release from manure-amended soils.
  • The plant enhances soil P adsorption and reduces P loss, offering an environmentally beneficial solution.
  • This approach improves P bioavailability, supporting P. vittata growth and potentially other P-utilizing plants.