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BioEnergy Research

, Volume 6, Issue 2, pp 469–475 | Cite as

Screening Perennial Warm-Season Bioenergy Crops as an Alternative for Phytoremediation of Excess Soil P

  • Maria L. Silveira
  • Joao M. B. Vendramini
  • Xiaolin Sui
  • Lynn Sollenberger
  • George A. O’Connor
Article

Abstract

A recent alternative strategy to reduce environmental problems associated with P transport from agricultural soils is the use of bioenergy crops to remediate excess soil P. In addition to the positive impacts associated with P mitigation, harvested biomass used as a renewable energy source can also offset the cost associated with plant-based P remediation strategies. The objective of this study was to identify potential crop species that can be used for remediation of soil P and as a cellulosic feedstock for production of renewable energy in South Florida. Fifteen crop entries were investigated for their potential to remove P from a P-enriched soil. Dry matter (DM) yield varied among crop species with greatest yield observed for elephantgrass (Pennisetum purpureum Schum.) and sugarcane (Saccharum spp.) (43 and 39 Mg ha−1 year−1, respectively). Similarly, greater P removal rates were observed for elephantgrass (up to 126 kg P ha−1 year−1 in 2008) followed by sugarcane (62 kg P ha−1 year−1 in 2008). Although there was no effect (P = 0.45) of crop species on P reduction in the soil, soil P concentrations decreased linearly during the 3-year study. Because of its relatively greater DM yield and P removal rates, elephantgrass was shown to be a good candidate for remediation of excess soil P in South Florida Spodosols.

Keywords

Biomass Manure Perennial Phosphorus Remediation 

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Maria L. Silveira
    • 1
  • Joao M. B. Vendramini
    • 1
  • Xiaolin Sui
    • 1
  • Lynn Sollenberger
    • 2
  • George A. O’Connor
    • 3
  1. 1.Range Cattle Research and Education CenterUniversity of FloridaOnaUSA
  2. 2.Agronomy DepartmentUniversity of FloridaGainesvilleUSA
  3. 3.Soil and Water Science DepartmentUniversity of FloridaGainesvilleUSA

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