Variation throughout the year of N2 fixation of Acacia mangium in pure stand or in association with Eucalyptus grandis
N2-fixation by leguminous trees can be an important source of nitrogen in forest plantations, but little is known about its seasonal variations. We estimated N2-fi xation by Acacia mangium growing in pure stands (100A) and in association with Eucalyptus grandis (50A:50E) in Brazil. At 27 months of age, we applied ammonium sulphate (99.8 atom % 15N) diluted in water (1.1 kg N/ha) to the litter. Every 3 months during one year we selected four trees per species in each treatment and collected all the leaves from two branches distributed in each third of the canopy. The average percent of N derived from fi xation (%Ndfa) was 70.3±5.2% and 48.1±10.8% in 50A:50E and in 100A, respectively. The higher %Ndfa in mixture could be due to lower soil N availability than in 100A and to strong competition of Eucalyptus over Acacia for soil N uptake. The highest and lowest values of %Ndfa were observed at the end and at the beginning of the rainy season, respectively. N2-fixation showed lower seasonal variations in 50A:50E than in 100A. In this last treatment, %Ndfa was about 30% higher at the end of the rainy season than during other periods.
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Subjects: | F60 - Physiologie et biochimie végétale, F08 - Systèmes et modes de culture, Acacia mangium, Eucalyptus grandis, Fixation biologique de l'azote, culture associée, culture en mélange, variation saisonnière, http://aims.fao.org/aos/agrovoc/c_42, http://aims.fao.org/aos/agrovoc/c_2693, http://aims.fao.org/aos/agrovoc/c_27742, http://aims.fao.org/aos/agrovoc/c_35927, http://aims.fao.org/aos/agrovoc/c_4871, http://aims.fao.org/aos/agrovoc/c_24894, http://aims.fao.org/aos/agrovoc/c_1070, |
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dig-cirad-fr-5959972024-01-29T02:52:24Z http://agritrop.cirad.fr/595997/ http://agritrop.cirad.fr/595997/ Variation throughout the year of N2 fixation of Acacia mangium in pure stand or in association with Eucalyptus grandis. Paula Ranieri Ribeiro, Bouillet Jean-Pierre, Gonçalves José Leonardo M., Laclau Jean-Paul, Trivelin Paulo. 2014. International Forestry Review, 16 (5), n.spéc. XXIV IUFRO World Congress abstracts, Résumé : p. 367. IUFRO World Congress. Sustaining Forests, Sustaining People: The Role of Research. 24, Salt Lake City, États-Unis, 5 Octobre 2014/11 Octobre 2014.https://www.ingentaconnect.com/content/cfa/ifr/2014/00000016/00000005 <https://www.ingentaconnect.com/content/cfa/ifr/2014/00000016/00000005> Variation throughout the year of N2 fixation of Acacia mangium in pure stand or in association with Eucalyptus grandis Paula, Ranieri Ribeiro Bouillet, Jean-Pierre Gonçalves, José Leonardo M. Laclau, Jean-Paul Trivelin, Paulo eng 2014 International Forestry Review F60 - Physiologie et biochimie végétale F08 - Systèmes et modes de culture Acacia mangium Eucalyptus grandis Fixation biologique de l'azote culture associée culture en mélange variation saisonnière http://aims.fao.org/aos/agrovoc/c_42 http://aims.fao.org/aos/agrovoc/c_2693 http://aims.fao.org/aos/agrovoc/c_27742 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_4871 http://aims.fao.org/aos/agrovoc/c_24894 Brésil http://aims.fao.org/aos/agrovoc/c_1070 N2-fixation by leguminous trees can be an important source of nitrogen in forest plantations, but little is known about its seasonal variations. We estimated N2-fi xation by Acacia mangium growing in pure stands (100A) and in association with Eucalyptus grandis (50A:50E) in Brazil. At 27 months of age, we applied ammonium sulphate (99.8 atom % 15N) diluted in water (1.1 kg N/ha) to the litter. Every 3 months during one year we selected four trees per species in each treatment and collected all the leaves from two branches distributed in each third of the canopy. The average percent of N derived from fi xation (%Ndfa) was 70.3±5.2% and 48.1±10.8% in 50A:50E and in 100A, respectively. The higher %Ndfa in mixture could be due to lower soil N availability than in 100A and to strong competition of Eucalyptus over Acacia for soil N uptake. The highest and lowest values of %Ndfa were observed at the end and at the beginning of the rainy season, respectively. N2-fixation showed lower seasonal variations in 50A:50E than in 100A. In this last treatment, %Ndfa was about 30% higher at the end of the rainy season than during other periods. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/595997/1/595997.pdf text Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html https://www.ingentaconnect.com/content/cfa/ifr/2014/00000016/00000005 info:eu-repo/semantics/altIdentifier/purl/https://www.ingentaconnect.com/content/cfa/ifr/2014/00000016/00000005 |
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F60 - Physiologie et biochimie végétale F08 - Systèmes et modes de culture Acacia mangium Eucalyptus grandis Fixation biologique de l'azote culture associée culture en mélange variation saisonnière http://aims.fao.org/aos/agrovoc/c_42 http://aims.fao.org/aos/agrovoc/c_2693 http://aims.fao.org/aos/agrovoc/c_27742 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_4871 http://aims.fao.org/aos/agrovoc/c_24894 http://aims.fao.org/aos/agrovoc/c_1070 F60 - Physiologie et biochimie végétale F08 - Systèmes et modes de culture Acacia mangium Eucalyptus grandis Fixation biologique de l'azote culture associée culture en mélange variation saisonnière http://aims.fao.org/aos/agrovoc/c_42 http://aims.fao.org/aos/agrovoc/c_2693 http://aims.fao.org/aos/agrovoc/c_27742 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_4871 http://aims.fao.org/aos/agrovoc/c_24894 http://aims.fao.org/aos/agrovoc/c_1070 |
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F60 - Physiologie et biochimie végétale F08 - Systèmes et modes de culture Acacia mangium Eucalyptus grandis Fixation biologique de l'azote culture associée culture en mélange variation saisonnière http://aims.fao.org/aos/agrovoc/c_42 http://aims.fao.org/aos/agrovoc/c_2693 http://aims.fao.org/aos/agrovoc/c_27742 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_4871 http://aims.fao.org/aos/agrovoc/c_24894 http://aims.fao.org/aos/agrovoc/c_1070 F60 - Physiologie et biochimie végétale F08 - Systèmes et modes de culture Acacia mangium Eucalyptus grandis Fixation biologique de l'azote culture associée culture en mélange variation saisonnière http://aims.fao.org/aos/agrovoc/c_42 http://aims.fao.org/aos/agrovoc/c_2693 http://aims.fao.org/aos/agrovoc/c_27742 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_4871 http://aims.fao.org/aos/agrovoc/c_24894 http://aims.fao.org/aos/agrovoc/c_1070 Paula, Ranieri Ribeiro Bouillet, Jean-Pierre Gonçalves, José Leonardo M. Laclau, Jean-Paul Trivelin, Paulo Variation throughout the year of N2 fixation of Acacia mangium in pure stand or in association with Eucalyptus grandis |
description |
N2-fixation by leguminous trees can be an important source of nitrogen in forest plantations, but little is known about its seasonal variations. We estimated N2-fi xation by Acacia mangium growing in pure stands (100A) and in association with Eucalyptus grandis (50A:50E) in Brazil. At 27 months of age, we applied ammonium sulphate (99.8 atom % 15N) diluted in water (1.1 kg N/ha) to the litter. Every 3 months during one year we selected four trees per species in each treatment and collected all the leaves from two branches distributed in each third of the canopy. The average percent of N derived from fi xation (%Ndfa) was 70.3±5.2% and 48.1±10.8% in 50A:50E and in 100A, respectively. The higher %Ndfa in mixture could be due to lower soil N availability than in 100A and to strong competition of Eucalyptus over Acacia for soil N uptake. The highest and lowest values of %Ndfa were observed at the end and at the beginning of the rainy season, respectively. N2-fixation showed lower seasonal variations in 50A:50E than in 100A. In this last treatment, %Ndfa was about 30% higher at the end of the rainy season than during other periods. |
format |
article |
topic_facet |
F60 - Physiologie et biochimie végétale F08 - Systèmes et modes de culture Acacia mangium Eucalyptus grandis Fixation biologique de l'azote culture associée culture en mélange variation saisonnière http://aims.fao.org/aos/agrovoc/c_42 http://aims.fao.org/aos/agrovoc/c_2693 http://aims.fao.org/aos/agrovoc/c_27742 http://aims.fao.org/aos/agrovoc/c_35927 http://aims.fao.org/aos/agrovoc/c_4871 http://aims.fao.org/aos/agrovoc/c_24894 http://aims.fao.org/aos/agrovoc/c_1070 |
author |
Paula, Ranieri Ribeiro Bouillet, Jean-Pierre Gonçalves, José Leonardo M. Laclau, Jean-Paul Trivelin, Paulo |
author_facet |
Paula, Ranieri Ribeiro Bouillet, Jean-Pierre Gonçalves, José Leonardo M. Laclau, Jean-Paul Trivelin, Paulo |
author_sort |
Paula, Ranieri Ribeiro |
title |
Variation throughout the year of N2 fixation of Acacia mangium in pure stand or in association with Eucalyptus grandis |
title_short |
Variation throughout the year of N2 fixation of Acacia mangium in pure stand or in association with Eucalyptus grandis |
title_full |
Variation throughout the year of N2 fixation of Acacia mangium in pure stand or in association with Eucalyptus grandis |
title_fullStr |
Variation throughout the year of N2 fixation of Acacia mangium in pure stand or in association with Eucalyptus grandis |
title_full_unstemmed |
Variation throughout the year of N2 fixation of Acacia mangium in pure stand or in association with Eucalyptus grandis |
title_sort |
variation throughout the year of n2 fixation of acacia mangium in pure stand or in association with eucalyptus grandis |
url |
http://agritrop.cirad.fr/595997/ http://agritrop.cirad.fr/595997/1/595997.pdf |
work_keys_str_mv |
AT paularanieriribeiro variationthroughouttheyearofn2fixationofacaciamangiuminpurestandorinassociationwitheucalyptusgrandis AT bouilletjeanpierre variationthroughouttheyearofn2fixationofacaciamangiuminpurestandorinassociationwitheucalyptusgrandis AT goncalvesjoseleonardom variationthroughouttheyearofn2fixationofacaciamangiuminpurestandorinassociationwitheucalyptusgrandis AT laclaujeanpaul variationthroughouttheyearofn2fixationofacaciamangiuminpurestandorinassociationwitheucalyptusgrandis AT trivelinpaulo variationthroughouttheyearofn2fixationofacaciamangiuminpurestandorinassociationwitheucalyptusgrandis |
_version_ |
1792499977108324352 |