Field evaluation of willow under short rotation coppice for phytomanagement of metal-polluted agricultural soils

Int J Phytoremediation. 2013;15(7):677-89. doi: 10.1080/15226514.2012.723070.

Abstract

Short rotation coppice (SRC) of willow and poplar might be a promising phytoremediation option since it uses fast growing, high biomass producing tree species with often a sufficient metal uptake. This study evaluates growth, metal uptake and extraction potentials of eight willow clones (Belders, Belgisch Rood, Christina, Inger, Jorr, Loden, Tora and Zwarte Driebast) on a metal-contaminated agricultural soil, with total cadmium (Cd) and zinc (Zn) concentrations of 6.5 +/- 0.8 and 377 +/- 69 mg kg(-1) soil, respectively. Although, during the first cycle, on average generally low productivity levels (3.7 ton DM (dry matter) ha(-1) y(-1)) were obtained on this sandy soil, certain clones exhibited quite acceptable productivity levels (e.g. Zwarte Driebast 12.5 ton DM ha(-1) y(-1)). Even at low biomass productivity levels, SRC of willow showed promising removal potentials of 72 g Cd and 2.0 kg Zn ha(-1) y(-1), which is much higher than e.g. energy maize or rapeseed grown on the same soil Cd and Zn removal can be increased by 40% if leaves are harvested as well. Nevertheless, nowadays the wood price remains the most critical factor in order to implement SRC as an acceptable, economically feasible alternative crop on metal-contaminated agricultural soils.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Agriculture
  • Belgium
  • Biodegradation, Environmental
  • Biomass
  • Cadmium / metabolism*
  • Plant Leaves
  • Plant Stems
  • Populus / growth & development
  • Populus / metabolism*
  • Rotation
  • Salix / growth & development
  • Salix / metabolism*
  • Soil / chemistry
  • Soil Pollutants / analysis
  • Soil Pollutants / metabolism*
  • Wood
  • Zinc / metabolism*

Substances

  • Soil
  • Soil Pollutants
  • Cadmium
  • Zinc