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O escorrimento ao longo do tronco em olivais tradicionais e super-intensivos
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Resumo(s)
Stemflow (Sf) is responsible for a localized water and solute input to soil around tree’s trunks, with this effect playing an important eco-hydrological role in forested and agricultural ecosystems.
Stemflow was study over 7 months in 25 trees of Olea europaea L. distributed in three olive groves in the regions of Lisboa e Santarém. The amount of Sf measured in each trees ranged from 7,5 to 87,2 mm, corresponding to 1,2 to 16,7% of gross precipitation. Linear regression models were fitted between Sf and the main meteorological variables and morphological tree characteristics. The more relevant explanatory variables were gross rainfall amount and intensity, and tree and trunk heights.
There were significant differences in the dimensions of leaves between varieties and between trees of the same varieties. The differences do not seem to affect the amount of Sf generated.
Through analysis of bark storage capacity, it was found that older trees, with rough and deep bark, had higher trunk storage capacity and, therefore, originated less Sf.
We also tried to relate the funnelling ratio (FR) with some selected characteristics. Only one acceptable linear relationship between the FR and the volume of precipitation was found
Descrição
Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia
Palavras-chave
Olea europaea stemflow olive grove funneling ratio modelling
Contexto Educativo
Citação
Dias, P.D.P.P. - O escorrimento ao longo do tronco em olivais tradicionais e super-intensivos. Lisboa: ISA, 2014, 95 p.