Dominance of legume trees alters nutrient relations in mixed species forest restoration plantings within seven years

Siddique, Ilyas, Engel, Vera Lex, Parrotta, John A., Lamb, David, Nardoto, Gabriela B., Ometto, Jean P. H. B., Martinelli, Luiz A. and Schmidt, Susanne (2008) Dominance of legume trees alters nutrient relations in mixed species forest restoration plantings within seven years. Biogeochemistry, 88 1: 89-101. doi:10.1007/s10533-008-9196-5


Author Siddique, Ilyas
Engel, Vera Lex
Parrotta, John A.
Lamb, David
Nardoto, Gabriela B.
Ometto, Jean P. H. B.
Martinelli, Luiz A.
Schmidt, Susanne
Title Dominance of legume trees alters nutrient relations in mixed species forest restoration plantings within seven years
Journal name Biogeochemistry   Check publisher's open access policy
ISSN 0168-2563
Publication date 2008-03-01
Year available 2008
Sub-type Article (original research)
DOI 10.1007/s10533-008-9196-5
Volume 88
Issue 1
Start page 89
End page 101
Total pages 13
Place of publication Dordrecht, Netherlands
Publisher Springer Netherlands
Collection year 2009
Language eng
Subject 270499 Botany not elsewhere classified
C1
961203 Rehabilitation of Degraded Forest and Woodlands Environments
060208 Terrestrial Ecology
04 Earth Sciences
Formatted abstract
Failures in reforestation are often attributed to nutrient limitation for tree growth. We compared tree performance and nitrogen and phosphorus relations in adjacent mixed-species plantings of contrasting composition, established for forest restoration on Ultisol soil, originally covered by tropical semi-deciduous Atlantic Forest in Southeast Brazil. Nutrient relations of four tree species occurring in both planting mixtures were compared between a legume-dominated, species-poor direct seeding mixture of early-successional species (“legume mixture”), and a species-diverse, legume-poor mixture of all successional groups (“diverse mixture”). After 7 years, the legume mixture had 6-fold higher abundance of N2-fixing trees, 177% higher total tree basal area, 22% lower litter C/N, six-fold higher in situ soil resin-nitrate, and 40% lower in situ soil resin-P, compared to the diverse mixture. In the legume mixture, non-N2-fixing legume Schizolobium parahyba (Fabaceae-Caesalpinioideae) had significantly lower proportional N resorption, and both naturally regenerating non-legume trees had significantly higher leaf N concentrations, and higher proportional P resorption, than in the diverse mixture. This demonstrate forms of plastic adjustment in all three non-N2-fixing species to diverged nutrient relations between mixtures. By contrast, leaf nutrient relations in N2-fixing Enterolobium contortisiliquum (Fabaceae-Mimosoideae) did not respond to planting mixtures. Rapid N accumulation in the legume mixture caused excess soil nitrification over nitrate immobilization and tighter P recycling compared with the diverse mixture. The legume mixture succeeded in accelerating tree growth and canopy closure, but may imply periods of N losses and possibly P limitation. Incorporation of species with efficient nitrate uptake and P mobilization from resistant soil pools offers potential to optimize these tradeoffs.
Keyword Native tree plantations
Nodulating multi-purpose trees
Nutrient retranslocation
Soil nitrate
Stand nitrogen accrual
Tropical forest restoration
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Biological Sciences Publications
Ecology Centre Publications
 
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Created: Tue, 18 Nov 2008, 01:36:29 EST by Gail Walter on behalf of School of Biological Sciences