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Please use this identifier to cite or link to this item: http://hdl.handle.net/10400.5/3874

Title: Influência do regime hídrico e da rega no comportamento da casta Touriga Nacional na Região do Dão
Other Titles: Influence of the water regime and irrigation on the behaviour of grapevines cv. Touriga Nacional in the Dão region
Authors: Rodrigues, Pedro
Advisor: Alves, Isabel Maria Lopes
Keywords: vitis vinifera
irrigation
water stress indicators
transpiration
modelling
wine quality
Issue Date: 2011
Publisher: ISA/UTL
Citation: Rodrigues, Pedro - Influência do regime hídrico e da rega no comportamento da casta Touriga Nacional na Região do Dão. Lisboa, ISA, 2011
Abstract: The main objective of this work was to evaluate the behaviour of cv “Touriga Nacional” when subjected to different water regimes, so as to determine the impacts of irrigation amount and irrigation scheduling on yield and quality of the respective musts in the Dão region. To characterize the water regime of the vines, available soil water was monitored throughout the several crop developmental stages, as well as several plant based indicators of water stress (leaf and stem water potential, stomatal resistance, surface radiometric temperature). Vegetative growth, yield and must quality were determined at harvest. A two-layer model, based on meteorological data and measured surface radiative temperature, was built and calibrated in order to estimate the partition of the energy balance of the canopy (vines + undercover/soil) and its components, during the growth and maturation phase of the grapes. It allows a good estimation of daily transpiration of the vines, which can therefore be used to better interpret the results obtained relative to the water stress indicators and yield and quality parameters. The results show that irrigation led to small differences between treatments, despite the different water depths applied in the different irrigation treatments, since plant transpiration during fruit formation and maturation was practically the same, due to the extraction of the soil water reserves by the deep root system.
Description: Doutoramento em Engenharia dos Biossistemas - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/3874
Appears in Collections:BISA - Teses de Doutoramento / Doctoral Thesis

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