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Publication
Impactes da intensidade de mobilização do solo em plantações de eucalipto
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Advisor(s)
Abstract(s)
O presente relatório de estágio resulta dos estudos, realizados no âmbito da
Investigação e Consultoria Florestal do RAIZ, relativos à preparação do terreno, para a
instalação das espécies florestais. Independentemente do tipo de cultura, agrícola ou
florestal, a preparação do solo é uma das etapas que mais pode impactar o ambiente,
principalmente os recursos solo e água, sendo assim preponderante o seu estudo para
uma utilização adequada das práticas ou técnicas a cada local.
Assim, e uma vez que os solos florestais em Portugal na sua generalidade apresentam
um baixo nível de fertilidade e na sua maioria são pouco profundos, pretendeu-se neste
trabalho avaliar a resposta da espécie Eucalyptus globulus à mobilização do solo, pela
aplicação de diferentes intensidades de ripagem do solo.
Em novembro de 2017, foi instalado um ensaio numa propriedade alvo de rearborização
de um povoamento de eucalipto em final de segunda rotação, localizada no concelho
de Mortágua, onde foram aplicados dois tratamentos com diferentes intensidades de
ripagem do solo. O Tratamento 1 consistiu de uma ripagem com um ferro ou dente de
ripper e o Tratamento 2 de uma ripagem com 3 ferros (dentes) de ripper. Em ambos os
tratamentos foram efetuados o mesmo tipo de gestão de sobrantes ou resíduos de corte.
Os resultados obtidos a partir dos parâmetros dendrométricos, altura e sobrevivência
das árvores indicam que ao fim de 1,5 anos de idade do povoamento, não há diferenças
significativas nas alturas das árvores, nem na sua taxa de sobrevivência entre os dois
tratamentos. Também não foram observadas diferenças significativas entre tratamentos
relativamente ao nível da fertilidade do solo. Em termos de custos das operações
florestais, no que diz respeito à ripagem, com a aplicação do Tratamento 1 (menos
intensivo) é possível obter uma redução de cerca de 153 €/ha.
Palavras-chave: Eucalyptus globulus, Preparação do Terreno, Ripagem, Solo
This internship report is the result of studies carried out in the context of RAIZ's Forest Research and Consulting, concerning the preparation of the ground for the installation of forest species. Regardless of the type of crop, agricultural or forestry, soil preparation is one of the stages that can most impact the environment, especially the soil and water resources, and thus its study is predominant for an appropriate use of practices or techniques at each location. Since the forest soils in Portugal generally present a low level of fertility and are mostly shallow, the aim of this work was to evaluate the response of Eucalyptus globulus species to soil tillage by applying different intensities of soil ripping. In November 2017, a trial field was installed on a targeted property where a secondrotation eucalyptus reforestation was made, located in the municipality of Mortágua, where two treatments with different soil ripening intensities were applied. Treatment 1 consisting of ripping with an iron or ripper teeth and Treatment 2 of ripping with 3ripper teeth. In both treatments the same type of management of cutting residues was performed. The results indicate that, up to 1.5 years of age of the forest stand, the implementation of the two treatments, with different intensities of soil tillage, did not cause significant differences in tree heights or survival rate, there was no effect on forest productivity. The same happened for soil fertility. In terms of the forestry operations cost, with respect to ripping, by applying treatment 1 (less intensive) can be achieved a reduction of around 153 € / ha. Keyword: Eucalyptus globulus, Ripping, Soil, Soil Tillage
This internship report is the result of studies carried out in the context of RAIZ's Forest Research and Consulting, concerning the preparation of the ground for the installation of forest species. Regardless of the type of crop, agricultural or forestry, soil preparation is one of the stages that can most impact the environment, especially the soil and water resources, and thus its study is predominant for an appropriate use of practices or techniques at each location. Since the forest soils in Portugal generally present a low level of fertility and are mostly shallow, the aim of this work was to evaluate the response of Eucalyptus globulus species to soil tillage by applying different intensities of soil ripping. In November 2017, a trial field was installed on a targeted property where a secondrotation eucalyptus reforestation was made, located in the municipality of Mortágua, where two treatments with different soil ripening intensities were applied. Treatment 1 consisting of ripping with an iron or ripper teeth and Treatment 2 of ripping with 3ripper teeth. In both treatments the same type of management of cutting residues was performed. The results indicate that, up to 1.5 years of age of the forest stand, the implementation of the two treatments, with different intensities of soil tillage, did not cause significant differences in tree heights or survival rate, there was no effect on forest productivity. The same happened for soil fertility. In terms of the forestry operations cost, with respect to ripping, by applying treatment 1 (less intensive) can be achieved a reduction of around 153 € / ha. Keyword: Eucalyptus globulus, Ripping, Soil, Soil Tillage
Description
Keywords
Eucalyptus globulus Preparação do Terreno Ripagem Solo