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Combining modeling and experimental approaches for developing rice-oil palm agroforestry systems.
Perez, Raphaël P A; Vezy, Rémi; Bordon, Romain; Laisné, Thomas; Roques, Sandrine; Rebolledo, Maria-Camila; Rouan, Lauriane; Fabre, Denis; Gibert, Olivier; De Raissac, Marcel.
Afiliación
  • Perez RPA; CIRAD, UMR AGAP Institut, F-34398 Montpellier, France.
  • Vezy R; UMR AGAP Institut, Univ Montpellier, CIRAD, INRAE, Institut Agro, Montpellier, France.
  • Bordon R; CIRAD, UMR AMAP, F-34398 Montpellier, France.
  • Laisné T; AMAP, Univ Montpellier, CNRS, CIRAD, INRAE, IRD, Montpellier, France.
  • Roques S; CIRAD, UMR AGAP Institut, F-34398 Montpellier, France.
  • Rebolledo MC; UMR AGAP Institut, Univ Montpellier, CIRAD, INRAE, Institut Agro, Montpellier, France.
  • Rouan L; CIRAD, UMR AGAP Institut, F-34398 Montpellier, France.
  • Fabre D; UMR AGAP Institut, Univ Montpellier, CIRAD, INRAE, Institut Agro, Montpellier, France.
  • Gibert O; CIRAD, UMR AGAP Institut, F-34398 Montpellier, France.
  • De Raissac M; UMR AGAP Institut, Univ Montpellier, CIRAD, INRAE, Institut Agro, Montpellier, France.
J Exp Bot ; 75(13): 4074-4092, 2024 Jul 10.
Article en En | MEDLINE | ID: mdl-38537200
ABSTRACT
Monoculture systems in South East Asia are facing challenges due to climate change-induced extreme weather conditions, leading to significant annual production losses in rice and oil palm. To ensure the stability of these crops, innovative strategies like resilient agroforestry systems need to be explored. Converting oil palm (Elaeis guineensis) monocultures to rice (Oryza sativa)-based intercropping systems shows promise, but achieving optimal yields requires adjusting palm density and identifying rice varieties adapted to changes in light quantity and diurnal fluctuation. This paper proposes a methodology that combines a model of light interception with indoor experiments to assess the feasibility of rice-oil palm agroforestry systems. Using a functional-structural plant model of oil palm, the planting design was optimized to maximize transmitted light for rice. Simulation results estimated the potential impact on oil palm carbon assimilation and transpiration. In growth chambers, simulated light conditions were replicated with adjustments to intensity and daily fluctuation. Three light treatments independently evaluated the effects of light intensity and fluctuation on different rice accessions. The simulation study revealed intercropping designs that significantly increased light transmission for rice cultivation with minimal decrease in oil palm densities compared with conventional designs. The results estimated a loss in oil palm productivity of less than 10%, attributed to improved carbon assimilation and water use efficiency. Changes in rice plant architecture were primarily influenced by light quantity, while variations in yield components were attributed to light fluctuations. Different rice accessions exhibited diverse responses to light fluctuations, indicating the potential for selecting genotypes suitable for agroforestry systems.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Oryza / Arecaceae Idioma: En Revista: J Exp Bot Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Reino Unido

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Oryza / Arecaceae Idioma: En Revista: J Exp Bot Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Reino Unido