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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Evidence of short-term belowground transfer of nitrogen from Acacia mangium to Eucalyptus grandis trees in a tropical planted forest

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Autor(es):
Paula, Ranieri Ribeiro [1] ; Bouillet, Jean-Pierre [1, 2] ; Ocheuze Trivelin, Paulo Cesar [3] ; Zeller, Bernd [4] ; de Moraes Goncalves, Jose Leonardo [1] ; Nouvellon, Yann [1, 2] ; Bouvet, Jean-Marc [5] ; Plassard, Claude [6] ; Laclau, Jean-Paul [2, 7]
Número total de Autores: 9
Afiliação do(s) autor(es):
[1] USP ESALQ, Dept Ciencias Florestais, BR-13418900 Piracicaba, SP - Brazil
[2] CIRAD, UMR Eco & Sols, Ecol Fonct & Biogeochim Sols & Agroecosyst, F-34060 Montpellier - France
[3] USP CENA, Div Desenvolvimento Tecn Analit & Nucl, BR-13416000 Piracicaba, SP - Brazil
[4] INRA, UR 1138, Biogeochim Ecosyst Forestiers, Nancy, Champenoux - France
[5] CIRAD, UMR AGAP, F-34398 Montpellier 5 - France
[6] INRA, UMR Eco & Sols, Ecol Fonct & Biogeochim Sols & Agroecosyst, F-34060 Montpellier - France
[7] UNESP, Dept Ciencia Florestal Julio de Mesquita Filho, BR-18610300 Botucatu, SP - Brazil
Número total de Afiliações: 7
Tipo de documento: Artigo Científico
Fonte: SOIL BIOLOGY & BIOCHEMISTRY; v. 91, p. 99-108, DEC 2015.
Citações Web of Science: 15
Resumo

The short-term belowground transfer of nitrogen from nitrogen-fixing trees to companion trees has never been studied in the field. A N-15 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. N-15-No-3(-) 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 N-15 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 N-15 enriched from 5 days after labeling. The delta N-15 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 N-15 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. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 11/20510-8 - Processos de transferência de n em curto e longo prazo em plantios mistos de Eucalyptus grandis e Acacia mangium
Beneficiário:Ranieri Ribeiro Paula
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 10/16623-9 - Intensificação ecológica de plantações de eucaliptos pela associação com espécies leguminosas arbóreas fixadoras de nitrogênio
Beneficiário:José Leonardo de Moraes Gonçalves
Linha de fomento: Auxílio à Pesquisa - Temático