A functional and structural Mongolian scots pine (Pinus sylvestris var. mongolica) model integrating architecture, biomass and effects of precipitation

Wang Feng, Letort Véronique, Qi Lu, Xuefeng Bai, Guo Yan, De Reffye Philippe, Li Baoguo. 2012. A functional and structural Mongolian scots pine (Pinus sylvestris var. mongolica) model integrating architecture, biomass and effects of precipitation. PloS One, 7 (8):e43531, 13 p.

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Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie; Staps

Abstract : Mongolian Scots pine (Pinus sylvestris var. mongolica) is one of the principal tree species in the network of Three-North Shelterbelt for windbreak and sand stabilisation in China. The functions of shelterbelts are highly correlated with the architecture and eco-physiological processes of individual tree. Thus, model-assisted analysis of canopy architecture and function dynamic in Mongolian Scots pine is of value for better understanding its role and behaviour within shelterbelt ecosystems in these arid and semiarid regions. We present here a single-tree functional and structural model, derived from the GreenLab model, which is adapted for young Mongolian Scots pines by incorporation of plant biomass production, allocation, allometric rules and soil water dynamics. The model is calibrated and validated based on experimental measurements taken on Mongolian Scots pines in 2007 and 2006 under local meteorological conditions. Measurements include plant biomass, topology and geometry, as well as soil attributes and standard meteorological data. After calibration, the model allows reconstruction of three-dimensional (3D) canopy architecture and biomass dynamics for trees from oneto six-year-old at the same site using meteorological data for the six years from 2001 to 2006. Sensitivity analysis indicates that rainfall variation has more influence on biomass increment than on architecture, and the internode and needle compartments and the aboveground biomass respond linearly to increases in precipitation. Sensitivity analysis also shows that the balance between internode and needle growth varies only slightly within the range of precipitations considered here. The model is expected to be used to investigate the growth of Mongolian Scots pines in other regions with different soils and climates. (Résumé d'auteur)

Mots-clés Agrovoc : Pinus sylvestris, Modèle mathématique, Développement biologique, Couverture végétale, Croissance, Biomasse, Précipitation, Port de la plante, Anatomie végétale, Type de sol

Mots-clés géographiques Agrovoc : Liaoning

Mots-clés complémentaires : Architecture des arbres

Classification Agris : F62 - Plant physiology - Growth and development
F50 - Plant structure
U10 - Computer science, mathematics and statistics
P40 - Meteorology and climatology

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Wang Feng, CAU [China Agricultural University] (CHN)
  • Letort Véronique, Ecole centrale Paris (FRA)
  • Qi Lu, Chinese Academy of Forestry (CHN)
  • Xuefeng Bai, Liaoning Sand Stabilisation and Afforestation Institute (CHN)
  • Guo Yan, CAU [China Agricultural University] (CHN)
  • De Reffye Philippe, CIRAD-BIOS-UMR AMAP (FRA)
  • Li Baoguo, CAU [China Agricultural University] (CHN)

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