Search for dissertations about: "needle pinus"

Showing result 1 - 5 of 7 swedish dissertations containing the words needle pinus.

  2. 1. Foliar fungi of Scots pine (Pinus sylvestris)

    Author : Hanna Millberg; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Scots pine (Pinus sylvestris) is an ecologically and economically important tree species in Fennoscandia. Scots pine needles host a variety of fungi, some with the potential to profoundly influence their host. These fungi can have beneficial or detrimental effects with important implications for both forest health and primary production. READ MORE

  4. 2. Spring water stress in Scots pine: interaction of snow and soil temperature

    Author : Per-Erik Mellander; Mittuniversitetet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Low temperature; soil warming; transpiration; root water uptake; carbon dioxide assimilation; soil frost; silvicultural practice; Pinus Sylvestris; Biology; Biologi;

    Abstract : Water use and net carbon assimilation during spring was examined on Scots pine trees exposed to different soil warming dynamics in the field. Sap flow, needle water potential and net carbon assimilation were measured on trees that were exposed to a wide range of soil temperature regimes caused by manipulating the snow cover on tree-scale soil plots. READ MORE

  5. 3. Long-term effects of nitrogen (N) fertilizer and simulated N deposition on boreal forest growth

    Author : Fredrik From; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : The studies presented in this thesis aims to increase our understanding of the long-term effects of anthropogenic nitrogen (N) input via fertilization or atmospheric N deposition on tree growth in boreal forest. Firstly, I studied carry-over effects of forest fertilization between tree generations. READ MORE

  6. 4. Effects of site preparation and stump harvest on carbon dynamics in forest soils

    Author : Kristina Mjöfors; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Efforts are being made to substitute fossil fuels with renewable alternatives to address increasing concerns regarding global climate change driven by anthropogenic emissions of CO2 and other greenhouse gases. Stumps of harvested trees could make a significant contribution to these efforts in Scandinavia. READ MORE

  7. 5. Monoterpenes from the boreal coniferous forest : their role in atmospheric chemistry

    Author : Robert Janson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The goal of this work has been to increase our knowledge of the role of the monoteipenes emitted by the boreal coniferous forest in atmospheric chemical processes. To this end, measurements of air concentrations and emission rates have been made in forests of Scots pine (Pinus sylvestris) and Norwegian spruce (Picea abies) at 4 sites throughout Sweden, during the summers of 1989 and 1990. READ MORE