In Iberian cereal-steppes, decoupling of payments from current production levels through the Single Farm Payment raised concerns regarding the potential for land abandonment and replacement of sheep by cattle, with eventual negative consequences for declining grassland birds. This study addressed this issue by analysing the responses of five grassland bird species of conservation concern to spatial land use gra...
A ocorrência de doenças em árvores urbanas é um dos principais constrangimentos técnicos e económicos na gestão do património arbóreo. O conhecimento do estado sanitário das árvores e a possibilidade de monitorizar a ocorrência de determinados patogéneos, constituem importantes instrumentos para o estabelecimento de critérios de selecção, gestão e manutenção das árvores urbanas. Neste contexto, procurou-se estu...
Os pólens das árvores urbanas podem participar decisivamente na manifestação de doenças respiratórias alérgicas. Por outro lado, o estado sanitário das árvores e a poluição do ar podem influenciar a quantidade, características e época de produção de pólen. Neste contexto, iniciou-se um projecto de investigação visando: (a) desenvolver o conhecimento das relações entre produção de pólen e elementos do clima, pol...
The growth and nutritional state of young Eucalyptus was evaluated by foliar analysis (contents of N, P and photosynthetic pigments) and the SPAD-502 chlorophyll meter. An experimental system was used with different harvest residues management, such as incorporation of residues into the soil (I), removal of residues (R), and distribution of residues on the soil surface (S), with N fertiliser application (IF, RF...
Biomass and nutrient amounts accumulated in the above ground biomass along the rotation period of maritime pine stands of the Leiria National Forest were evaluated. Amounts of biomass and nutrients of understory were also assessed. Furthermore, mass and nutrients in organic soil layers, as well as nutrient amounts in mineral soil layers (up to 100 cm depth) were evaluated. A strong increment of above ground bio...
Afforestation often causes direct habitat losses for farmland birds of conservation concern, but it is uncertain whether negative effects also extend significantly into adjacent open land. Information is thus required on how these species react to wooded edges, and how their responses are affected by edge and landscape characteristics. These issues were examined in Mediterranean arable farmland, using bird coun...
Harrowing and fertilisation are common practices at middle rotation in Eucalyptus globulus Labill. plantations in Central Portugal. In order to clarify the effects of such practices on understory vegetation and timber production, a field trial was installed in a 5-year-old first rotation eucalyptus plantation, in a region with mixed oceanic and Mediterranean climatic influences. Four treatments that involved ha...
Harrowing and fertilisation are common practices at middle rotation in Eucalyptus globulus Labill. plantations in Central Portugal. In order to clarify the effects of such practices on understory vegetation and timber production, a field trial was installed in a 5-year-old first rotation eucalyptus plantation, in a region with mixed oceanic and Mediterranean climatic influences. Four treatments that involved ha...
The effect of harvest residue management options on biomass and nutrient accumulation in understory vegetation, as well as the contribution of understory to nutrient cycling, were assessed during the early rotation stage of a Eucalyptus globulus Labill. plantation in Central Portugal. The effects of residue management options on early tree growth were also evaluated. Treatments established at the time of planta...
Este documento foi elaborado com o objectivo de divulgar um conjunto de orientações técnicas para a produção em viveiro de plantas lenhosas ribeirinhas de qualidade. Nele são sintetizados os resultados provenientes das actividades desenvolvidas no âmbito do Protocolo INAG – ISA/UTAD “Valorização e Requalificação das Galerias Ribeirinhas na Área do Empreendimento de Odelouca” (Contrato n.º 2004/057/INAG).
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