Potential of Bioassays to Assess Consequences of Cultivation of Acacia mangium Trees on Nitrogen Bioavailability to Eucalyptus Trees: Two Case-Studies in Contrasting Tropical Soils - Institut Agro Montpellier Accéder directement au contenu
Article Dans Une Revue Plants Année : 2023

Potential of Bioassays to Assess Consequences of Cultivation of Acacia mangium Trees on Nitrogen Bioavailability to Eucalyptus Trees: Two Case-Studies in Contrasting Tropical Soils

Résumé

We hypothesized that the nitrogen-fixing tree Acacia mangium could improve the growth and nitrogen nutrition of non-fixing tree species such as Eucalyptus. We measured the N-mineralization and respiration rates of soils sampled from plots covered with Acacia, Eucalyptus or native vegetation at two tropical sites (Itatinga in Brazil and Kissoko in the Congo) in the laboratory. We used a bioassay to assess N bioavailability to eucalypt seedlings grown with and without chemical fertilization for at least 6 months. At each site, Eucalyptus seedling growth and N bioavailability followed the same trends as the N-mineralization rates in soil samples. However, despite lower soil N-mineralization rates under Acacia in the Congo than in Brazil, Eucalyptus seedling growth and N bioavailability were much greater in the Congo, indicating that bioassays in pots are more accurate than N-mineralization rates when predicting the growth of eucalypt seedlings. Hence, in the Congo, planting Acacia mangium could be an attractive option to maintain the growth and N bioavailability of the non-fixing species Eucalyptus while decreasing chemical fertilization. Plant bioassays could help determine if the introduction of N 2-fixing trees will improve the growth and mineral nutrition of non-fixing tree species in tropical planted forests.
Fichier principal
Vignette du fichier
Waithaisong-Plants-2023-CC-BY.pdf (692.09 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Licence : CC BY - Paternité

Dates et versions

hal-04034995 , version 1 (17-03-2023)

Licence

Paternité

Identifiants

Citer

Kittima Waithaisong, Agnès Robin, Louis Mareschal, Jean-Pierre Bouillet, Jean-Michel Harmand, et al.. Potential of Bioassays to Assess Consequences of Cultivation of Acacia mangium Trees on Nitrogen Bioavailability to Eucalyptus Trees: Two Case-Studies in Contrasting Tropical Soils. Plants, 2023, 12, pp.802. ⟨10.3390/plants12040802⟩. ⟨hal-04034995⟩
24 Consultations
11 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More