| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 2.65 MB | Adobe PDF |
Authors
Advisor(s)
Abstract(s)
O género Eucalyptus é de origem Australiana, mas também pode ser encontrado na Nova Guiné, Timor e Mollucas. Em Portugal Continental foi introduzido entre os anos de 1854 e 1859 e nos dias de hoje, as áreas de florestas plantadas de eucalipto em Portugal são da ordem de 884 mil hectares e contribui nos aspectos socioeconômicos e ambientais. Os efeitos edafoclimáticos afetam diretamente a produtividade dos povoamentos de eucalipto, nomeadamente o clima (temperatura, precipitação, geada e ventos) e o solo (propriedades físicas, químicas e biológicas). Por sua vez o relevo, material genético, pragas e doenças, incêndios florestais e gestão florestal, também influenciam a produtividade. Na zona Norte de Portugal os efeitos edafoclimáticos favorecem no crescimento/produtividade dos povoamentos de eucalipto. Esta zona do país apresenta em média solos com maiores profundidades (67 cm) e menor pedregosidade (27%). Já em relação ao clima, apresenta as maiores médias de precipitação total (1815 mm), precipitação nos meses junho a agosto (106,35 mm) e maior nº de dias (125) com precipitação acima de 1 mm e ainda com as menores médias de temperatura mínima (3,9 ºC), média (14 ºC) e máxima (28 ºC). A zona Norte, com um acréscimo médio anual (AMA) em volume na ordem dos 19,73 m³ ha-¹ ano-¹ apresenta-se como a mais produtiva. Logo em seguida é a zona Centro (16,79 m³ ha-¹ ano-¹), depois é a zona de Lisboa e Vale do Tejo (LVT) (13,80 m³ ha-¹ ano-¹), em penúltimo lugar a zona do Alentejo (9,77 m³ ha-¹ ano-¹) e por último encontra-se a zona do Algarve (8,61 m³ ha-¹ ano-¹). O programa WebGlobulus implementa um modelo de crescimento e produção empírico ao nível do povoamento de eucalipto e que, pode parametrizar com as informações edafoclimáticos em função da localização dos povoamentos. Por um lado, algumas informações obtidas pelo simulador WebGlobulus ainda não são 100% compatíveis ou semelhantes com as informações do Inventário Florestal, por outro lado, o problema que os usuários precisam definr uma classe de Site Index para depois conseguirem os valores de AMA. O programa WebGlobulus é uma ferramenta valiosíssima e que pode fornecer informações muito úteis acerca dos povoamentos de eucalipto, mas como sugestão de melhoria poderia ter uma interface que permitisse chegar a valores mais exatos do Site Index.
The genus Eucalyptus is of Australian origin, but can also be found in New Guinea, Timor and Mollucas. In mainland Portugal it was introduced between the years 1854 and 1859 and today, the areas of eucalyptus planted forests in Portugal are of the order of 884 thousand hectares and contribute to socioeconomic and environmental aspects. The edaphoclimatic effects directly affect the productivity of eucalyptus stands, namely the climate (temperature, precipitation, frost and winds) and the soil (physical, chemical and biological properties). In turn, relief, genetic material, pests and diseases, forest fires and forest management also influence productivity. In northern Portugal, edaphoclimatic effects favor the growth / productivity of eucalyptus stands. This area of the country has, on average, soils with greater depths (67 cm) and less stony (27%). In relation to the climate, it presents the highest average of total precipitation (1815 mm), precipitation in the months June to August (106.35 mm) and the greatest number of days (125) with precipitation above 1 (mm) and with the lowest averages of minimum (3.9 ºC), average (14 ºC) and maximum (28 ºC) temperatures. The North zone, with an average annual increase (AAI) in volume of around 19.73 m³ ha-¹ year-¹, presents itself as the most productive. Right after that is the Central zone (16.79 m³ ha-¹ year-¹), then it is the Lisbon and Vale do Tejo (LVT) zone (13.80 m³ ha-¹ year-¹), second to last zone from the Alentejo (9.77 m³ ha-¹ year-¹) and finally there is the Algarve (8.61 m³ ha-¹ year-¹). The WebGlobulus program implements a model of growth and empirical production at the level of the eucalyptus stand, which can be parameterized with the edaphoclimatic information depending on the location of the stands. On the one hand, some information obtained by the WebGlobulus simulator is not yet 100% compatible or similar with the information from the Forest Inventory, on the other hand, the problem that users need to define a Site Index class to later obtain the AAI values. The WebGlobulus program is a very valuable tool and can provide very useful information about eucalyptus stands, but as a suggestion for improvement it could have an interface that would allow you to reach more accurate values of the Site Index.
The genus Eucalyptus is of Australian origin, but can also be found in New Guinea, Timor and Mollucas. In mainland Portugal it was introduced between the years 1854 and 1859 and today, the areas of eucalyptus planted forests in Portugal are of the order of 884 thousand hectares and contribute to socioeconomic and environmental aspects. The edaphoclimatic effects directly affect the productivity of eucalyptus stands, namely the climate (temperature, precipitation, frost and winds) and the soil (physical, chemical and biological properties). In turn, relief, genetic material, pests and diseases, forest fires and forest management also influence productivity. In northern Portugal, edaphoclimatic effects favor the growth / productivity of eucalyptus stands. This area of the country has, on average, soils with greater depths (67 cm) and less stony (27%). In relation to the climate, it presents the highest average of total precipitation (1815 mm), precipitation in the months June to August (106.35 mm) and the greatest number of days (125) with precipitation above 1 (mm) and with the lowest averages of minimum (3.9 ºC), average (14 ºC) and maximum (28 ºC) temperatures. The North zone, with an average annual increase (AAI) in volume of around 19.73 m³ ha-¹ year-¹, presents itself as the most productive. Right after that is the Central zone (16.79 m³ ha-¹ year-¹), then it is the Lisbon and Vale do Tejo (LVT) zone (13.80 m³ ha-¹ year-¹), second to last zone from the Alentejo (9.77 m³ ha-¹ year-¹) and finally there is the Algarve (8.61 m³ ha-¹ year-¹). The WebGlobulus program implements a model of growth and empirical production at the level of the eucalyptus stand, which can be parameterized with the edaphoclimatic information depending on the location of the stands. On the one hand, some information obtained by the WebGlobulus simulator is not yet 100% compatible or similar with the information from the Forest Inventory, on the other hand, the problem that users need to define a Site Index class to later obtain the AAI values. The WebGlobulus program is a very valuable tool and can provide very useful information about eucalyptus stands, but as a suggestion for improvement it could have an interface that would allow you to reach more accurate values of the Site Index.
Description
Keywords
Eucalipto Fatores edafoclimáticos Produtividade Estimativa