dc.contributor | Universidade de São Paulo (USP) | |
dc.contributor | Écologie Fonctionnelle and oBiogéochimie des Sols and Agroécosystèmes | |
dc.contributor | Biogéochimie des Ecosystèmes Forestiers | |
dc.contributor | UMR AGAP | |
dc.contributor | Écologie Fonctionnelle and Biogéochimie des Sols and Agroécosystèmes | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2018-12-11T16:39:11Z | |
dc.date.available | 2018-12-11T16:39:11Z | |
dc.date.created | 2018-12-11T16:39:11Z | |
dc.date.issued | 2015-12-01 | |
dc.identifier | Soil Biology and Biochemistry, v. 91, p. 99-108. | |
dc.identifier | 0038-0717 | |
dc.identifier | http://hdl.handle.net/11449/168000 | |
dc.identifier | 10.1016/j.soilbio.2015.08.017 | |
dc.identifier | 2-s2.0-84941312766 | |
dc.identifier | 2-s2.0-84941312766.pdf | |
dc.description.abstract | The short-term belowground transfer of nitrogen from nitrogen-fixing trees to companion trees has never been studied in the field. A 15N pulse-labeling study was conducted in a mixed plantation of Acacia mangium and Eucalyptus grandis at the peak of leaf area, 26 months after planting. 15N-NO3 - was injected into the stem of one big Acacia tree in three plots. 15N was traced over 2 months in the labeled Acacia tree as well as in neighboring Eucalyptus trees. For both species, young leaves were sampled, as well as fine roots and the rhizosphere at a distance of 0.75 m and 2.25 m from the labeled tree. The 15N atom% was also determined in the wood, bark, branches and total foliage of the 3 labeled Acacia trees and 9 Eucalyptus trees, 60 days after labeling. Most of the leaves, fine roots and rhizosphere samples of both species were 15N enriched from 5 days after labeling. The δ15N values were higher at a distance of 0.75 m than at 2.25 m in Acacia roots, but were similar at both distances in Eucalyptus roots and the rhizospheres. The wood and bark of Eucalyptus trees sampled at a distance of 6.2 m from the labeled Acacia trees were 15N enriched. This shows belowground N transfer from Acacia to Eucalyptus trees in the field during the first few days after labeling. This facilitation process may provide a significant amount of the nitrogen requirements of trees close to N-fixing trees in mixed forests. | |
dc.language | eng | |
dc.relation | Soil Biology and Biochemistry | |
dc.relation | 2,604 | |
dc.rights | Acesso aberto | |
dc.source | Scopus | |
dc.subject | 15N | |
dc.subject | Acacia | |
dc.subject | Common mycorrhizal network | |
dc.subject | Eucalyptus | |
dc.subject | Exudates | |
dc.subject | Nitrogen facilitation | |
dc.subject | Nitrogen fixing trees | |
dc.subject | Stem injection | |
dc.title | Evidence of short-term belowground transfer of nitrogen from Acacia mangium to Eucalyptus grandis trees in a tropical planted forest | |
dc.type | Artículos de revistas | |