Sökning: "Douglas fir"
Visar resultat 1 - 5 av 13 uppsatser innehållade orden Douglas fir.
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 CentreSammanfattning : 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
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 CentreSammanfattning : 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
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 ekosystemvetenskapSammanfattning : 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
4. Etablering och tillväxt av Douglasgran i ett proveniensförsök i södra Sverige
Kandidat-uppsats, SLU/Dept. of Forest Ecology and ManagementSammanfattning : 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
5. Thuja plicata - etableringsförsök av jättetuja med fyra olika provenienser
Kandidat-uppsats, Linnéuniversitetet/Institutionen för skog och träteknik (SOT)Sammanfattning : Future climate changes may lead to an interest of alternative and foreign forest tree species in order to spread the risks in forestry. Douglas fir, Sitka spruce, Freemont cottonwood and hybrid aspen are examples of popular foreign tree species that along with western red cedar could have a future in the Swedish forests. LÄS MER