Plant and Soil

, Volume 179, Issue 1, pp 131–140

N2-Fixation, nodule efficiency and biomass accumulation after two years in three Chilean legume trees and Tagasaste Chamaecytisus proliferus subsp. palmensis

  • Carlos Ovalle
  • Luis Longeri
  • James Aronson
  • Alfonzo Herrera
  • Julia Avendaño

DOI: 10.1007/BF00011650

Cite this article as:
Ovalle, C., Longeri, L., Aronson, J. et al. Plant Soil (1996) 179: 131. doi:10.1007/BF00011650


Initial results of a long-term field experiment are presented for the above and below-ground biomass accumulation after two years, as well as root nodulation, nodule efficiency (g N fixed/g nodules) and biological N2 fixation (using the 15N isotope dilution method) of four N2-fixing tree species (NFTs) grown in the subhumid mediterranean-climate zone of central Chile. Two non-legume tree species, Fraxinus excelsior and Schinus polygamus, were used as reference plants for the isotope dilution calculations.

Over two years, Tagasaste (Chamaecytisus proliferus subsp. palmensis, a Papilionoideae from the Canary Islands), produced 10 to 20 times more biomass than the other three NFTS (Acacia caven, Prosopis alba and P. chilensis); all Mimosoideae native to Chile, and nodulation and nitrogen fixed were an order of magnitude higher as well. At the end of the second year, the percentage of N derived from N2 fixation (%Ndfa) in Tagasate averaged 85.6, equivalent to ca. 49.1 g N fixed per tree. For all four NFTs, however, %Ndfa, nodule efficiency, and total N accumulation varied from one year to the next; caution is thus required in interpreting or predicting NFT performance over the long term, even if Tagasaste can already be considered a highly promising NFT for central Chile.

Key words

Acacia cavenagroforestryChamaecytisus proliferus subsp. palmensisisotope dilution15Nnitrogen fixationnodule efficiencyProsopis

Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • Carlos Ovalle
    • 1
  • Luis Longeri
    • 2
  • James Aronson
    • 3
  • Alfonzo Herrera
    • 4
  • Julia Avendaño
    • 5
  1. 1.Instituto de Investigaciones Agropecuarias (INIA)Quilamapu Experimental StationChillánChile
  2. 2.Laboratory of Soil ScienceUniversity of concepciónChillánChile
  3. 3.CNRS/CEFEMontpellierFrance
  4. 4.Laboratory of RhizobiologyUniversity of ConcepciónChillánChile
  5. 5.Cauquenes Experimental SubstationINIACauquenesChile