Sökning: "Pseudotsuga"

Visar resultat 1 - 5 av 7 uppsatser innehållade ordet Pseudotsuga.

  1. 1. The effect of heat and UVC treatments on seed germination and seed-borne fungi of Pinus sylvestris, Pinus contorta and Pseudotsuga menziesii used in Swedish nurseries

    Master-uppsats, SLU/Southern Swedish Forest Research Centre

    Författare :Wiktoria Breza; [2023]
    Nyckelord :seed-borne pathogens; artificial regeneration; conifers; thermotherapy;

    Sammanfattning : Pathogen free seeds are critical to produce healthy plants for forest regeneration. However, recent studies have shown that tree seed carry a high diversity of fungi including known and unknown pathogens. LÄS MER

  3. 2. Comparison of native and introduced tree species in a range from low to high productivity sites in southern Sweden

    Master-uppsats, SLU/Southern Swedish Forest Research Centre

    Författare :Gailene Brazaityte; [2023]
    Nyckelord :introduced tree species; low productivity sites; moderate productivity sites; high productivity sites; Picea abies; Pinus sylvestris; Betula pendula; Picea glauca; Picea mariana; Picea sitchensis; Pinus contorta; Pseudotsuga menziesii; Abies grandis; Populus balsamifera; Larix x eurolepis; Populus tremula × Populus tremuloides;

    Sammanfattning : The dilemma of climate change, biodiversity conservation and economic efficiency in nowadays forestry leads us to search for the new solutions. Introduction of non-native tree species becomes a more frequently explored field as a solution for the future problems. LÄS MER

  4. 3. Physiological responses to drought in healthy and stressed trees : a comparison of four species in Oregon, USA

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Julia Kelly; [2016]
    Nyckelord :tree-rings; water potential; geography; physical geography; drought; Earth and Environmental Sciences;

    Sammanfattning : Four tree species in Oregon (USA) were studied to examine physiological and structural responses to drought stress: ponderosa pine (Pinus ponderosa) and western juniper (Juniperus occidentalis) in a semi-arid ecoregion, and Douglas-fir (Pseudotsuga menziesii) and white oak (Quercus garryana) in a mesic coastal ecoregion. This investigation compared the response of paired healthy and stressed (. LÄS MER

  5. 4. Etablering och tillväxt av Douglasgran i ett proveniensförsök i södra Sverige

    Kandidat-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Magnus Persson; [2015]
    Nyckelord :Pseudotsuga menziesii; proveniens; frost; överlevnad; inland; kust;

    Sammanfattning : I denna studie utvärderades ett proveniensförsök med douglasgran som anlades 2010 på Tönnersjöhedens försökspark, SLU i samarbete med Södra Skog. Syftet var att utreda skadebilden, tillväxten och avgång efter tre tillväxtsäsonger för 7 olika provenienser av Douglasgran, och genom statistiska analyser peka på skillnader i mellan kust-och inlandsprovenienser. LÄS MER

  7. 5. The growth dynamics of Douglas fir in Sweden and Finland : application of the 3-PG stand growth model

    Master-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Wolfgang Nemec; [2014]
    Nyckelord :Douglas fir ; Pseudotsuga menziesii; Scandinavia; growth dynamics; 3-PG stand growth model; model validation;

    Sammanfattning : Little research has yet been conducted on the growth of Douglas fir (Pseudotsuga menziesii (Mirbel) Franco var. menziesii) in Sweden albeit its potentials as a commercial tree species in the future. Therefore, this study aimed at capturing currently available field and reference data for the purpose of evaluation. LÄS MER