Growth, nutrition and biological fixation of nitrogen in mixed-species plantations of eucalypt with leguminous trees

Authors

  • Selma Regina de Freitas Coelho
  • José Leonardo de Moraes Gonçalves
  • Sergio Luis de Miranda Mello
  • Rildo Moreira Moreira
  • Eduardo Vinícius da Silva
  • Jean-Paul Laclau

DOI:

https://doi.org/10.1590/S1678-3921.pab2007.v42.7628

Keywords:

consortium, fine root, mixed plantation, native leguminous

Abstract

The objective of this work was to assess interactions between species on the above and belowground growth, nitrogen uptake and biological nitrogen fixation (BNF) in mixed stands of Eucalyptus grandis and native leguminous N2-fixing trees. A complete randomized block design was installed with seven treatments and three blocks. Within the lines of the E. grandis seedlings, native leguminous N2-fixing trees – Peltophorum dubium, Inga sp., Mimosa scabrella, Acacia polyphylla, Mimosa caesalpiniaefolia – and one exotic leguminous plant, Acacia mangium, were intercropped. E. grandis was also solely planted. Mimosa scabrella and A. mangium were the legume trees that presented the highest growth. Although E. grandis showed a lower growth when combined with M. scabrella, this mixed-species stand exhibited the highest biomass accumulation. Eucalyptus grandis fine root densities (FRD) were 6–20 times higher than the FRD of the leguminous species in the upper soil layer (0–10 cm) 24 months after planting. The FRD of M. scabrella and M. caesalpiniaefolia in the 30–50 cm soil layer was higher than in the 10–30 cm layer. The d15N values of M. scabrella indicated that 90% of stocked N is derived from BNF.

Published

2007-06-01

How to Cite

Coelho, S. R. de F., Gonçalves, J. L. de M., Mello, S. L. de M., Moreira, R. M., Silva, E. V. da, & Laclau, J.-P. (2007). Growth, nutrition and biological fixation of nitrogen in mixed-species plantations of eucalypt with leguminous trees. Pesquisa Agropecuaria Brasileira, 42(6), 759–768. https://doi.org/10.1590/S1678-3921.pab2007.v42.7628

Issue

Section

FORESTRY