caa a22 4500 477111211 CHVBK 20180405111609.0 cr unu---uuuuu 170330e19960201xx s 000 0 eng 10.1007/BF00011650 doi (NATIONALLICENCE)springer-10.1007/BF00011650 N2-Fixation, nodule efficiency and biomass accumulation after two years in three Chilean legume trees and Tagasaste Chamaecytisus proliferus subsp. palmensis [Elektronische Daten] [Carlos Ovalle, Luis Longeri, James Aronson, Alfonzo Herrera, Julia Avendaño] 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. Kluwer Academic Publishers, 1996 Acacia caven nationallicence agroforestry nationallicence Chamaecytisus proliferus subsp. palmensis nationallicence isotope dilution nationallicence 15N nationallicence nitrogen fixation nationallicence nodule efficiency nationallicence Prosopis nationallicence Ovalle Carlos Instituto de Investigaciones Agropecuarias (INIA), Quilamapu Experimental Station, Casilla 426, Chillán, Chile aut Longeri Luis Laboratory of Soil Science, University of concepción, Chillán, Chile aut Aronson James CNRS/CEFE, B.P. 5051, 34033, Montpellier, France aut Herrera Alfonzo Laboratory of Rhizobiology, University of Concepción, Chillán, Chile aut Avendaño Julia Cauquenes Experimental Substation, INIA, Cauquenes, Chile aut Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl 179/1(1996-02-01), 131-140 0032-079X 179:1<131 1996 179 11104 https://doi.org/10.1007/BF00011650 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00011650 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ovalle Carlos Instituto de Investigaciones Agropecuarias (INIA), Quilamapu Experimental Station, Casilla 426, Chillán, Chile aut NATIONALLICENCE 700 1- Longeri Luis Laboratory of Soil Science, University of concepción, Chillán, Chile aut NATIONALLICENCE 700 1- Aronson James CNRS/CEFE, B.P. 5051, 34033, Montpellier, France aut NATIONALLICENCE 700 1- Herrera Alfonzo Laboratory of Rhizobiology, University of Concepción, Chillán, Chile aut NATIONALLICENCE 700 1- Avendaño Julia Cauquenes Experimental Substation, INIA, Cauquenes, Chile aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl/ 179/1(1996-02-01), 131-140 0032-079X 179:1<131 1996 179 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer