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High-Throughput Measurement and Classification of Organic P in Environmental Samples
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Published on: June 8, 2011

Liming poultry manures to decrease soluble phosphorus and suppress the bacteria population.

R O Maguire1, D Hesterberg, A Gernat

  • 1Department of Soil Science, North Carolina State University, Raleigh, NC 27695, USA. rory_maguire@ncsu.edu

Journal of Environmental Quality
|April 6, 2006
PubMed
Summary
This summary is machine-generated.

Adding calcium oxide (CaO) or calcium hydroxide (Ca(OH)2) to poultry waste significantly reduced harmful bacteria and stabilized phosphorus (P). This treatment minimizes P runoff into surface waters and improves soil health after land application.

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Area of Science:

  • Agricultural Science
  • Environmental Science
  • Soil Science

Background:

  • Poultry waste management faces challenges with phosphorus (P) loss and pathogen contamination, impacting water quality and soil health.
  • Effective stabilization of P and pathogen reduction in poultry manure is crucial for sustainable agricultural practices.

Purpose of the Study:

  • To evaluate calcium oxide (CaO) and calcium hydroxide (Ca(OH)2) for reducing bacterial populations and stabilizing phosphorus in poultry waste.
  • To investigate the effects of treated poultry waste on soil properties, specifically water-soluble phosphorus (WSP) and pH.

Main Methods:

  • Poultry manure and broiler litter were treated with varying rates (2.5-15%) of CaO and Ca(OH)2.
  • Treated wastes were analyzed for microbial counts, pH, and WSP. Selected samples underwent phosphorus X-ray absorption near edge structure (XANES) analysis.
  • Soils amended with treated broiler litter and layer manure were monitored for WSP and pH over 29 days.

Main Results:

  • Liming treatments significantly reduced bacterial populations in poultry waste, with higher lime rates yielding greater reductions.
  • Water-soluble phosphorus (WSP) in manures decreased by over 90% with at least 10% CaO application.
  • Amending soils with limed poultry waste reduced soil WSP and increased soil pH.

Conclusions:

  • CaO and Ca(OH)2 effectively reduce bacterial loads and stabilize phosphorus in poultry waste.
  • Land application of limed poultry waste mitigates P loss into surface waters and improves soil conditions.
  • This liming process offers a viable strategy for managing poultry waste, enhancing environmental protection and soil quality.