In order to assess primary productivity and transpiration of plant communities several approaches are used. Here a modification of the model developed by Vitale et al., based on the ‘big leaf’ approach, has been used to model functional behaviour of Vitis vinifera L. Model inputs are: latitude; mean temperature on monthly basis; maximum photosynthesis rate; Quantum Yield as a temperature function; leaf angle; reference temperature for respiration. Field gas-exchange measurements were carried out at leaf level and it was necessary to make some assumptions on canopy structure in order to avoid overestimation of biomass production. These assumptions are required since canopies structure in known to influence productivity and to determine canopy conductance. The model estimates a crop net production of 186 g dry weight/m2, in accordance with field data. The model also highlights the relationship between biomass production and canopy structure in accordance with those productivity models based on allometric relationships

Stima della produttività di Vitis vinifera L., tramite un modello big-leaf / Mereu, Simone; Vitale, Marcello; Manes, Fausto. - STAMPA. - (2003), pp. 39-39.

Stima della produttività di Vitis vinifera L., tramite un modello big-leaf

MEREU, Simone;VITALE, MARCELLO;MANES, Fausto
2003

Abstract

In order to assess primary productivity and transpiration of plant communities several approaches are used. Here a modification of the model developed by Vitale et al., based on the ‘big leaf’ approach, has been used to model functional behaviour of Vitis vinifera L. Model inputs are: latitude; mean temperature on monthly basis; maximum photosynthesis rate; Quantum Yield as a temperature function; leaf angle; reference temperature for respiration. Field gas-exchange measurements were carried out at leaf level and it was necessary to make some assumptions on canopy structure in order to avoid overestimation of biomass production. These assumptions are required since canopies structure in known to influence productivity and to determine canopy conductance. The model estimates a crop net production of 186 g dry weight/m2, in accordance with field data. The model also highlights the relationship between biomass production and canopy structure in accordance with those productivity models based on allometric relationships
2003
04 Pubblicazione in atti di convegno::04d Abstract in atti di convegno
Stima della produttività di Vitis vinifera L., tramite un modello big-leaf / Mereu, Simone; Vitale, Marcello; Manes, Fausto. - STAMPA. - (2003), pp. 39-39.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/221984
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