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Publicação
Desenvolvimento de um sistema inteligente de determinação das necessidades hídricas para cultura de lenhosas anisotrópicas
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Autores
Orientador(es)
Resumo(s)
This work presents a new approach to quantify crop water requirements for irrigation
scheduling in woody crops. Based in widely available technologies, in the scientific knowledge about
plant water relations and on weather prediction, a system was developed to quantify transpiration
and water status of a kiwifruit orchard – the case study used. Based on the observed actual crop
conditions and in the forecasted reference evapotranspiration, the SPAC model (system component)
simulates root water uptake and stomatal control to predict hourly crop transpiration and water status
evolution at short/medium term. To achieve this goal, a plant monitoring subsystem was developed
quantifying plant transpiration by means of sap flow measurements and quantifying actual crop water
status using a new microdendrometric index, locally calibrated. The experimental work that allowed
the development and testing of this system, was developed between 2003 and 2006, in controlled
and natural conditions, at ISA experimental facilities and in commercial orchards in northwest
Portugal.
Descrição
Doutoramento em Engenharia Agronómica - Instituto Superior de Agronomia
Palavras-chave
evapotranspiration crop monitoring numerical weather prediction SPAC model irrigation scheduling Actinidia deliciosa evapotranspiração monitorização vegetal previsão numérica do tempo modelo SPAC gestão da rega