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Please use this identifier to cite or link to this item: http://hdl.handle.net/10400.5/536

Title: Alterações climáticas na agricultura portuguesa: instrumentos de análise, impactos e medidas de adaptação
Other Titles: Climate change in portuguese agriculture: analysis tools, impacts and adaptation measures
Authors: Brandão, Ana Maria Cancella de Abreu de Paiva
Advisor: Pinto, Pedro Aguiar
Keywords: climate change
climate scenarios
simulation models
alterações climáticas
cenários climáticos
modelo de simulação
Issue Date: 2006
Abstract: There is a mounting evidence of climate change at a global scale. Temperature and carbon dioxide (CO2) increases and changes in precipitation are the main observed changes. In order to evaluate the impacts of these changes on wheat and maize in Continental Portugal CSM- -CROPSIM-CERES-Wheat and CSM-CERES-Maize models of DSSAT v4.0 were used after being calibrated to the conditions of Elvas. Weather data came from two HadRM3 model simulations. Soil data were collected from different soil map sources, standardised and completed using pedo- -transfer functions to fill in the missing soil properties. Soil data were then stored in a georeferenced database. In the future scenarios, yields decreased between -23% and -3% from control situations, reflecting the integration of positive (CO2) and negative (temperature) effects. Maize water use efficiency change was not consistent (-21% to 10%), but there was a positive nitrogen use efficiency change (2% to 69%). The anticipation of planting date avoided general yield decreases in future scenarios (1% to 7%). Moreover, maize water needs decreased (-15% to -2%), while applied nitrogen needs increased (3% to 17%).
Description: Doutoramento em Engenharia Agronómica - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/536
Appears in Collections:BISA - Teses de Doutoramento / Doctoral Thesis

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Tese_APBrandao.pdfTESE4.11 MBAdobe PDFView/Open
ANEXO_4.pdfAnexo 4155.67 kBAdobe PDFView/Open
ANEXO_8.pdfAnexo 8169.61 kBAdobe PDFView/Open
ANEXO_11.pdfAnexo 11276.18 kBAdobe PDFView/Open
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ANEXO_15.pdfAnexo 1549.67 kBAdobe PDFView/Open
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