Stem production, light absorption and light use efficiency between dominant and non-dominant trees of Eucalyptus grandis across a productivity gradient in Brazil
Brazilian Eucalyptus plantations are some of the most productive forest plantations in the world, sustaining mean growth rates of 25 Mg ha_1 year_1 (50 m3 ha_1 year_1) over the 4.7 million hectares planted across the country. To better understand forest productivity, studies at the stand scale need to be coupled with tree level evaluations of the production ecology (the assessment of wood production as a function of crown light absorption and light use efficiency). The soil clay content (_20% to _40%), topography and historical land use of the experimental site generated a natural gradient in productivity. We measured (from 6 to 7 years after planting) stem wood dry biomass growth and estimated light absorption and light use efficiency at the tree level with a three-dimensional array model (MAESTRA) in 12 plots within a seed-origin Eucalyptus grandis plantation. We investigated the hypothesis that dominant trees (the 20% largest) are more productive than non-dominant trees (the 20% smallest) as a result of greater light absorption and light use efficiency; and that with increasing productivity across plots, dominant trees would show larger increases in light use and light use efficiency in comparison to non-dominant trees. The 20% smallest of the trees averaged 10.6 kg of stem wood dry biomass (1.6 kg of stem wood growth during the last year of the rotation), compared with 185 kg per stem wood in the 20% largest of trees (34 kg of stem wood growth over the same period). The smallest trees contained 7.2% of the leaf area as compared to the largest trees (3.0 m2 versus 41.7 m2), and they absorbed only 6.7% as much light (2.2 versus 32.8 GJ year_1). The smallest trees grew at about 4.7% of the rate of the largest trees, which is a smaller percentage than the difference in absorbed photosynthetically active radiation; therefore the light use efficiency was lower for the smallest trees (0.75 kg GJ_1 versus 1.03 kg GJ_1). Our results show the significant contribution of dominant trees to stand productivity and the importance of evaluating production ecology at the individual tree scale.
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K10 - Production forestière F62 - Physiologie végétale - Croissance et développement U10 - Informatique, mathématiques et statistiques F40 - Écologie végétale Eucalyptus grandis plantation forestière forêt tropicale rendement des cultures croissance biomasse modélisation des cultures interactions biologiques compétition végétale lumière absorption photosynthèse efficacité écologie http://aims.fao.org/aos/agrovoc/c_2693 http://aims.fao.org/aos/agrovoc/c_3048 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_3394 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_9000024 http://aims.fao.org/aos/agrovoc/c_49896 http://aims.fao.org/aos/agrovoc/c_35264 http://aims.fao.org/aos/agrovoc/c_4322 http://aims.fao.org/aos/agrovoc/c_27 http://aims.fao.org/aos/agrovoc/c_5812 http://aims.fao.org/aos/agrovoc/c_2491 http://aims.fao.org/aos/agrovoc/c_2467 http://aims.fao.org/aos/agrovoc/c_6789 K10 - Production forestière F62 - Physiologie végétale - Croissance et développement U10 - Informatique, mathématiques et statistiques F40 - Écologie végétale Eucalyptus grandis plantation forestière forêt tropicale rendement des cultures croissance biomasse modélisation des cultures interactions biologiques compétition végétale lumière absorption photosynthèse efficacité écologie http://aims.fao.org/aos/agrovoc/c_2693 http://aims.fao.org/aos/agrovoc/c_3048 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_3394 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_9000024 http://aims.fao.org/aos/agrovoc/c_49896 http://aims.fao.org/aos/agrovoc/c_35264 http://aims.fao.org/aos/agrovoc/c_4322 http://aims.fao.org/aos/agrovoc/c_27 http://aims.fao.org/aos/agrovoc/c_5812 http://aims.fao.org/aos/agrovoc/c_2491 http://aims.fao.org/aos/agrovoc/c_2467 http://aims.fao.org/aos/agrovoc/c_6789 |
spellingShingle |
K10 - Production forestière F62 - Physiologie végétale - Croissance et développement U10 - Informatique, mathématiques et statistiques F40 - Écologie végétale Eucalyptus grandis plantation forestière forêt tropicale rendement des cultures croissance biomasse modélisation des cultures interactions biologiques compétition végétale lumière absorption photosynthèse efficacité écologie http://aims.fao.org/aos/agrovoc/c_2693 http://aims.fao.org/aos/agrovoc/c_3048 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_3394 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_9000024 http://aims.fao.org/aos/agrovoc/c_49896 http://aims.fao.org/aos/agrovoc/c_35264 http://aims.fao.org/aos/agrovoc/c_4322 http://aims.fao.org/aos/agrovoc/c_27 http://aims.fao.org/aos/agrovoc/c_5812 http://aims.fao.org/aos/agrovoc/c_2491 http://aims.fao.org/aos/agrovoc/c_2467 http://aims.fao.org/aos/agrovoc/c_6789 K10 - Production forestière F62 - Physiologie végétale - Croissance et développement U10 - Informatique, mathématiques et statistiques F40 - Écologie végétale Eucalyptus grandis plantation forestière forêt tropicale rendement des cultures croissance biomasse modélisation des cultures interactions biologiques compétition végétale lumière absorption photosynthèse efficacité écologie http://aims.fao.org/aos/agrovoc/c_2693 http://aims.fao.org/aos/agrovoc/c_3048 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_3394 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_9000024 http://aims.fao.org/aos/agrovoc/c_49896 http://aims.fao.org/aos/agrovoc/c_35264 http://aims.fao.org/aos/agrovoc/c_4322 http://aims.fao.org/aos/agrovoc/c_27 http://aims.fao.org/aos/agrovoc/c_5812 http://aims.fao.org/aos/agrovoc/c_2491 http://aims.fao.org/aos/agrovoc/c_2467 http://aims.fao.org/aos/agrovoc/c_6789 Camargo Campoe, Otávio Stape, Jose Luiz Nouvellon, Yann Laclau, Jean-Paul Bauerle, William L. Binkley, Dan Le Maire, Guerric Stem production, light absorption and light use efficiency between dominant and non-dominant trees of Eucalyptus grandis across a productivity gradient in Brazil |
description |
Brazilian Eucalyptus plantations are some of the most productive forest plantations in the world, sustaining mean growth rates of 25 Mg ha_1 year_1 (50 m3 ha_1 year_1) over the 4.7 million hectares planted across the country. To better understand forest productivity, studies at the stand scale need to be coupled with tree level evaluations of the production ecology (the assessment of wood production as a function of crown light absorption and light use efficiency). The soil clay content (_20% to _40%), topography and historical land use of the experimental site generated a natural gradient in productivity. We measured (from 6 to 7 years after planting) stem wood dry biomass growth and estimated light absorption and light use efficiency at the tree level with a three-dimensional array model (MAESTRA) in 12 plots within a seed-origin Eucalyptus grandis plantation. We investigated the hypothesis that dominant trees (the 20% largest) are more productive than non-dominant trees (the 20% smallest) as a result of greater light absorption and light use efficiency; and that with increasing productivity across plots, dominant trees would show larger increases in light use and light use efficiency in comparison to non-dominant trees. The 20% smallest of the trees averaged 10.6 kg of stem wood dry biomass (1.6 kg of stem wood growth during the last year of the rotation), compared with 185 kg per stem wood in the 20% largest of trees (34 kg of stem wood growth over the same period). The smallest trees contained 7.2% of the leaf area as compared to the largest trees (3.0 m2 versus 41.7 m2), and they absorbed only 6.7% as much light (2.2 versus 32.8 GJ year_1). The smallest trees grew at about 4.7% of the rate of the largest trees, which is a smaller percentage than the difference in absorbed photosynthetically active radiation; therefore the light use efficiency was lower for the smallest trees (0.75 kg GJ_1 versus 1.03 kg GJ_1). Our results show the significant contribution of dominant trees to stand productivity and the importance of evaluating production ecology at the individual tree scale. |
format |
article |
topic_facet |
K10 - Production forestière F62 - Physiologie végétale - Croissance et développement U10 - Informatique, mathématiques et statistiques F40 - Écologie végétale Eucalyptus grandis plantation forestière forêt tropicale rendement des cultures croissance biomasse modélisation des cultures interactions biologiques compétition végétale lumière absorption photosynthèse efficacité écologie http://aims.fao.org/aos/agrovoc/c_2693 http://aims.fao.org/aos/agrovoc/c_3048 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_3394 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_9000024 http://aims.fao.org/aos/agrovoc/c_49896 http://aims.fao.org/aos/agrovoc/c_35264 http://aims.fao.org/aos/agrovoc/c_4322 http://aims.fao.org/aos/agrovoc/c_27 http://aims.fao.org/aos/agrovoc/c_5812 http://aims.fao.org/aos/agrovoc/c_2491 http://aims.fao.org/aos/agrovoc/c_2467 http://aims.fao.org/aos/agrovoc/c_6789 |
author |
Camargo Campoe, Otávio Stape, Jose Luiz Nouvellon, Yann Laclau, Jean-Paul Bauerle, William L. Binkley, Dan Le Maire, Guerric |
author_facet |
Camargo Campoe, Otávio Stape, Jose Luiz Nouvellon, Yann Laclau, Jean-Paul Bauerle, William L. Binkley, Dan Le Maire, Guerric |
author_sort |
Camargo Campoe, Otávio |
title |
Stem production, light absorption and light use efficiency between dominant and non-dominant trees of Eucalyptus grandis across a productivity gradient in Brazil |
title_short |
Stem production, light absorption and light use efficiency between dominant and non-dominant trees of Eucalyptus grandis across a productivity gradient in Brazil |
title_full |
Stem production, light absorption and light use efficiency between dominant and non-dominant trees of Eucalyptus grandis across a productivity gradient in Brazil |
title_fullStr |
Stem production, light absorption and light use efficiency between dominant and non-dominant trees of Eucalyptus grandis across a productivity gradient in Brazil |
title_full_unstemmed |
Stem production, light absorption and light use efficiency between dominant and non-dominant trees of Eucalyptus grandis across a productivity gradient in Brazil |
title_sort |
stem production, light absorption and light use efficiency between dominant and non-dominant trees of eucalyptus grandis across a productivity gradient in brazil |
url |
http://agritrop.cirad.fr/566974/ http://agritrop.cirad.fr/566974/1/document_566974.pdf |
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dig-cirad-fr-5669742024-01-28T21:04:08Z http://agritrop.cirad.fr/566974/ http://agritrop.cirad.fr/566974/ Stem production, light absorption and light use efficiency between dominant and non-dominant trees of Eucalyptus grandis across a productivity gradient in Brazil. Camargo Campoe Otávio, Stape Jose Luiz, Nouvellon Yann, Laclau Jean-Paul, Bauerle William L., Binkley Dan, Le Maire Guerric. 2013. Forest Ecology and Management, 288 : 14-20.https://doi.org/10.1016/j.foreco.2012.07.035 <https://doi.org/10.1016/j.foreco.2012.07.035> Stem production, light absorption and light use efficiency between dominant and non-dominant trees of Eucalyptus grandis across a productivity gradient in Brazil Camargo Campoe, Otávio Stape, Jose Luiz Nouvellon, Yann Laclau, Jean-Paul Bauerle, William L. Binkley, Dan Le Maire, Guerric eng 2013 Forest Ecology and Management K10 - Production forestière F62 - Physiologie végétale - Croissance et développement U10 - Informatique, mathématiques et statistiques F40 - Écologie végétale Eucalyptus grandis plantation forestière forêt tropicale rendement des cultures croissance biomasse modélisation des cultures interactions biologiques compétition végétale lumière absorption photosynthèse efficacité écologie http://aims.fao.org/aos/agrovoc/c_2693 http://aims.fao.org/aos/agrovoc/c_3048 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_3394 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_9000024 http://aims.fao.org/aos/agrovoc/c_49896 http://aims.fao.org/aos/agrovoc/c_35264 http://aims.fao.org/aos/agrovoc/c_4322 http://aims.fao.org/aos/agrovoc/c_27 http://aims.fao.org/aos/agrovoc/c_5812 http://aims.fao.org/aos/agrovoc/c_2491 http://aims.fao.org/aos/agrovoc/c_2467 Sao Paulo http://aims.fao.org/aos/agrovoc/c_6789 Brazilian Eucalyptus plantations are some of the most productive forest plantations in the world, sustaining mean growth rates of 25 Mg ha_1 year_1 (50 m3 ha_1 year_1) over the 4.7 million hectares planted across the country. To better understand forest productivity, studies at the stand scale need to be coupled with tree level evaluations of the production ecology (the assessment of wood production as a function of crown light absorption and light use efficiency). The soil clay content (_20% to _40%), topography and historical land use of the experimental site generated a natural gradient in productivity. We measured (from 6 to 7 years after planting) stem wood dry biomass growth and estimated light absorption and light use efficiency at the tree level with a three-dimensional array model (MAESTRA) in 12 plots within a seed-origin Eucalyptus grandis plantation. We investigated the hypothesis that dominant trees (the 20% largest) are more productive than non-dominant trees (the 20% smallest) as a result of greater light absorption and light use efficiency; and that with increasing productivity across plots, dominant trees would show larger increases in light use and light use efficiency in comparison to non-dominant trees. The 20% smallest of the trees averaged 10.6 kg of stem wood dry biomass (1.6 kg of stem wood growth during the last year of the rotation), compared with 185 kg per stem wood in the 20% largest of trees (34 kg of stem wood growth over the same period). The smallest trees contained 7.2% of the leaf area as compared to the largest trees (3.0 m2 versus 41.7 m2), and they absorbed only 6.7% as much light (2.2 versus 32.8 GJ year_1). The smallest trees grew at about 4.7% of the rate of the largest trees, which is a smaller percentage than the difference in absorbed photosynthetically active radiation; therefore the light use efficiency was lower for the smallest trees (0.75 kg GJ_1 versus 1.03 kg GJ_1). Our results show the significant contribution of dominant trees to stand productivity and the importance of evaluating production ecology at the individual tree scale. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/566974/1/document_566974.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1016/j.foreco.2012.07.035 10.1016/j.foreco.2012.07.035 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.foreco.2012.07.035 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/j.foreco.2012.07.035 |