Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimes

Autores
Peri, Pablo Luis; Moot, Derrick; McNeil, David L.
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Daily net canopy photosynthesis (Pn) was predicted for cocksfoot (Dactylis glomerata L.) canopies grown under different light regimes by integration of a leaf photosynthesis model developed for the light-saturated photosynthetic rate (Pmax), photosynthetic efficiency (a) and the degree of curvature (h) of the leaf light– response curve. When shade was the only limiting factor, the maximum Pn (Pnmax) was predicted to decrease approximately linearly from 33.4 g CO2 mÿ2 dÿ1 to zero as photosynthetic photon flux density (PPFD) fell from full sunlight (1800 lmol mÿ2 sÿ1 PPFD) to 10% of this in a fluctuating light regime. It was also predicted that at 50% transmissivity Pnmax was higher for a continuous light regime (10.4 g CO2 mÿ2 dÿ1) than for a fluctuating light regime with the same intensity (8.4 g CO2 mÿ2 dÿ1). The canopy photosynthesis model was then used to predict dry matter (DM) production for cocksfoot field grown pastures under a diverse range of temperature, herbage nitrogen content and water status conditions in fluctuating light regimes. This prediction required inclusion of leaf area index and leaf canopy angle from field measurements. The model explained about 85% of the variation in observed cocksfoot DM production for a range from 6 to 118 kg DM haÿ1 dÿ1. The proposed model improves understanding of pasture growth prediction through integration of relationships between shade limitations in fluctuating light regimes and other environmental factors that affect the canopy photosynthetic rate of cocksfoot pastures in silvopastoral systems.
EEA Santa Cruz
Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina.
Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina.
Fil: Peri, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Fil: Moot, Derrick. Lincoln University. Faculty of Agriculture an Life Science; Nueva Zelanda
Fil: McNeil, David L. Lincoln University. Faculty of Agriculture an Life Science; Nueva Zelanda
Fuente
Agroforestry Systems 67 : 259-272 (2006)
Materia
Pastures
Photosynthesis
Dry Matter Content
Light Regimes
Leaf Area Index
Pastizales
Dactylis glomerata
Fotosíntesis
Régimen de Luz
Índice de Area Foliar
Contenido de Materia Seca
Fluctuating Light Regimes
Leaf Canopy Angle
Light Interception
Regimenes Fluctuantes de Luz
Ángulo del Dosel de las Hojas
Interceptación de Luz
Nivel de accesibilidad
acceso restringido
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/24097
Acceder
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oai_identifier_str oai:localhost:20.500.12123/24097
network_acronym_str INTADig
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network_name_str INTA Digital (INTA)
spelling Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimesPeri, Pablo LuisMoot, DerrickMcNeil, David L.PasturesPhotosynthesisDry Matter ContentLight RegimesLeaf Area IndexPastizalesDactylis glomerataFotosíntesisRégimen de LuzÍndice de Area FoliarContenido de Materia SecaFluctuating Light RegimesLeaf Canopy AngleLight InterceptionRegimenes Fluctuantes de LuzÁngulo del Dosel de las HojasInterceptación de LuzDaily net canopy photosynthesis (Pn) was predicted for cocksfoot (Dactylis glomerata L.) canopies grown under different light regimes by integration of a leaf photosynthesis model developed for the light-saturated photosynthetic rate (Pmax), photosynthetic efficiency (a) and the degree of curvature (h) of the leaf light– response curve. When shade was the only limiting factor, the maximum Pn (Pnmax) was predicted to decrease approximately linearly from 33.4 g CO2 mÿ2 dÿ1 to zero as photosynthetic photon flux density (PPFD) fell from full sunlight (1800 lmol mÿ2 sÿ1 PPFD) to 10% of this in a fluctuating light regime. It was also predicted that at 50% transmissivity Pnmax was higher for a continuous light regime (10.4 g CO2 mÿ2 dÿ1) than for a fluctuating light regime with the same intensity (8.4 g CO2 mÿ2 dÿ1). The canopy photosynthesis model was then used to predict dry matter (DM) production for cocksfoot field grown pastures under a diverse range of temperature, herbage nitrogen content and water status conditions in fluctuating light regimes. This prediction required inclusion of leaf area index and leaf canopy angle from field measurements. The model explained about 85% of the variation in observed cocksfoot DM production for a range from 6 to 118 kg DM haÿ1 dÿ1. The proposed model improves understanding of pasture growth prediction through integration of relationships between shade limitations in fluctuating light regimes and other environmental factors that affect the canopy photosynthetic rate of cocksfoot pastures in silvopastoral systems.EEA Santa CruzFil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina.Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina.Fil: Peri, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Moot, Derrick. Lincoln University. Faculty of Agriculture an Life Science; Nueva ZelandaFil: McNeil, David L. Lincoln University. Faculty of Agriculture an Life Science; Nueva ZelandaSpringer Nature2025-10-07T16:28:37Z2025-10-07T16:28:37Z2006-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/24097https://link.springer.com/article/10.1007/s10457-005-3825-yPeri P.L.; Moot D.J.; Mcneil D.L. (2006) Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimes. Agroforestry Systems 67: 259-272. https://doi.org/10.1007/s10457-005-3825-y1572-9680 (electronic)0167-4366 (print)https://doi.org/10.1007/s10457-005-3825-yAgroforestry Systems 67 : 259-272 (2006)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2025-10-23T11:19:46Zoai:localhost:20.500.12123/24097instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-10-23 11:19:46.959INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimes
title Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimes
spellingShingle Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimes
Peri, Pablo Luis
Pastures
Photosynthesis
Dry Matter Content
Light Regimes
Leaf Area Index
Pastizales
Dactylis glomerata
Fotosíntesis
Régimen de Luz
Índice de Area Foliar
Contenido de Materia Seca
Fluctuating Light Regimes
Leaf Canopy Angle
Light Interception
Regimenes Fluctuantes de Luz
Ángulo del Dosel de las Hojas
Interceptación de Luz
title_short Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimes
title_full Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimes
title_fullStr Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimes
title_full_unstemmed Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimes
title_sort Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimes
dc.creator.none.fl_str_mv Peri, Pablo Luis
Moot, Derrick
McNeil, David L.
author Peri, Pablo Luis
author_facet Peri, Pablo Luis
Moot, Derrick
McNeil, David L.
author_role author
author2 Moot, Derrick
McNeil, David L.
author2_role author
author
dc.subject.none.fl_str_mv Pastures
Photosynthesis
Dry Matter Content
Light Regimes
Leaf Area Index
Pastizales
Dactylis glomerata
Fotosíntesis
Régimen de Luz
Índice de Area Foliar
Contenido de Materia Seca
Fluctuating Light Regimes
Leaf Canopy Angle
Light Interception
Regimenes Fluctuantes de Luz
Ángulo del Dosel de las Hojas
Interceptación de Luz
topic Pastures
Photosynthesis
Dry Matter Content
Light Regimes
Leaf Area Index
Pastizales
Dactylis glomerata
Fotosíntesis
Régimen de Luz
Índice de Area Foliar
Contenido de Materia Seca
Fluctuating Light Regimes
Leaf Canopy Angle
Light Interception
Regimenes Fluctuantes de Luz
Ángulo del Dosel de las Hojas
Interceptación de Luz
dc.description.none.fl_txt_mv Daily net canopy photosynthesis (Pn) was predicted for cocksfoot (Dactylis glomerata L.) canopies grown under different light regimes by integration of a leaf photosynthesis model developed for the light-saturated photosynthetic rate (Pmax), photosynthetic efficiency (a) and the degree of curvature (h) of the leaf light– response curve. When shade was the only limiting factor, the maximum Pn (Pnmax) was predicted to decrease approximately linearly from 33.4 g CO2 mÿ2 dÿ1 to zero as photosynthetic photon flux density (PPFD) fell from full sunlight (1800 lmol mÿ2 sÿ1 PPFD) to 10% of this in a fluctuating light regime. It was also predicted that at 50% transmissivity Pnmax was higher for a continuous light regime (10.4 g CO2 mÿ2 dÿ1) than for a fluctuating light regime with the same intensity (8.4 g CO2 mÿ2 dÿ1). The canopy photosynthesis model was then used to predict dry matter (DM) production for cocksfoot field grown pastures under a diverse range of temperature, herbage nitrogen content and water status conditions in fluctuating light regimes. This prediction required inclusion of leaf area index and leaf canopy angle from field measurements. The model explained about 85% of the variation in observed cocksfoot DM production for a range from 6 to 118 kg DM haÿ1 dÿ1. The proposed model improves understanding of pasture growth prediction through integration of relationships between shade limitations in fluctuating light regimes and other environmental factors that affect the canopy photosynthetic rate of cocksfoot pastures in silvopastoral systems.
EEA Santa Cruz
Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina.
Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina.
Fil: Peri, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Fil: Moot, Derrick. Lincoln University. Faculty of Agriculture an Life Science; Nueva Zelanda
Fil: McNeil, David L. Lincoln University. Faculty of Agriculture an Life Science; Nueva Zelanda
description Daily net canopy photosynthesis (Pn) was predicted for cocksfoot (Dactylis glomerata L.) canopies grown under different light regimes by integration of a leaf photosynthesis model developed for the light-saturated photosynthetic rate (Pmax), photosynthetic efficiency (a) and the degree of curvature (h) of the leaf light– response curve. When shade was the only limiting factor, the maximum Pn (Pnmax) was predicted to decrease approximately linearly from 33.4 g CO2 mÿ2 dÿ1 to zero as photosynthetic photon flux density (PPFD) fell from full sunlight (1800 lmol mÿ2 sÿ1 PPFD) to 10% of this in a fluctuating light regime. It was also predicted that at 50% transmissivity Pnmax was higher for a continuous light regime (10.4 g CO2 mÿ2 dÿ1) than for a fluctuating light regime with the same intensity (8.4 g CO2 mÿ2 dÿ1). The canopy photosynthesis model was then used to predict dry matter (DM) production for cocksfoot field grown pastures under a diverse range of temperature, herbage nitrogen content and water status conditions in fluctuating light regimes. This prediction required inclusion of leaf area index and leaf canopy angle from field measurements. The model explained about 85% of the variation in observed cocksfoot DM production for a range from 6 to 118 kg DM haÿ1 dÿ1. The proposed model improves understanding of pasture growth prediction through integration of relationships between shade limitations in fluctuating light regimes and other environmental factors that affect the canopy photosynthetic rate of cocksfoot pastures in silvopastoral systems.
publishDate 2006
dc.date.none.fl_str_mv 2006-07
2025-10-07T16:28:37Z
2025-10-07T16:28:37Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/24097
https://link.springer.com/article/10.1007/s10457-005-3825-y
Peri P.L.; Moot D.J.; Mcneil D.L. (2006) Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimes. Agroforestry Systems 67: 259-272. https://doi.org/10.1007/s10457-005-3825-y
1572-9680 (electronic)
0167-4366 (print)
https://doi.org/10.1007/s10457-005-3825-y
url http://hdl.handle.net/20.500.12123/24097
https://link.springer.com/article/10.1007/s10457-005-3825-y
https://doi.org/10.1007/s10457-005-3825-y
identifier_str_mv Peri P.L.; Moot D.J.; Mcneil D.L. (2006) Validation of a canopy photosynthesis model for cocksfoot pastures grown under different light regimes. Agroforestry Systems 67: 259-272. https://doi.org/10.1007/s10457-005-3825-y
1572-9680 (electronic)
0167-4366 (print)
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv restrictedAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer Nature
publisher.none.fl_str_mv Springer Nature
dc.source.none.fl_str_mv Agroforestry Systems 67 : 259-272 (2006)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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