Sökning: "boreal forest soil"

Visar resultat 1 - 5 av 78 avhandlingar innehållade orden boreal forest soil.

  1. 1. Drivers of soil fungal communities in boreal forests : feedbacks on soil fertility and decomposition

    Detta är en avhandling från ; Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences

    Författare :Erica Sterkenburg; Sveriges lantbruksuniversitet.; [2016]
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Boreal forests harbour diverse fungal communities with decisive roles in decomposition and plant nutrition. Difficulties in studying soil fungi have limited knowledge about how fungal communities are shaped. LÄS MER

  2. 2. Boreal land surface water and heat balance Modelling soil-snow-vegetation-atmosphere behaviour

    Detta är en avhandling från Stockholm : KTH

    Författare :David Gustafsson; [2002]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; soil; snow; land surface heat exchange; forest; arable land; eddy-correlation; TECHNOLOGY Civil engineering and architecture; TEKNIKVETENSKAP Samhällsbyggnadsteknik och arkitektur;

    Sammanfattning : The water and heat exchange in thesoil-snow-vegetation-atmosphere system was studied in order toimprove the quantitative knowledge of land surface processes.In this study, numerical simulation models and availabledatasets representing arable land, sub-alpine snowpack, andboreal forest were evaluated at both diurnal and seasonaltimescales. LÄS MER

  3. 3. Soil nitrogen fluxes and root uptake in the boreal forest : key processes to plant nitrogen nutrition

    Detta är en avhandling från ; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences

    Författare :Olusegun Ayodeji Oyewole; Sveriges lantbruksuniversitet.; [2015]
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Nitrogen (N) is essential for growth and net primary production of plants. However, N acquisition by plants is influenced by movement of soil N compounds from bulk soil to plant roots and uptake of N by roots. This thesis is aimed at deepening our knowledge on these key processes involved in plant N acquisition in the N-limited boreal forest. LÄS MER

  4. 4. Ectomycorrhizal Fungal Mycelial Dynamics and its Role in Forest Soil Carbon Cycling

    Detta är en avhandling från ; Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences

    Författare :Andreas Hagenbo; Sveriges lantbruksuniversitet.; [2017]
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Most boreal tree species rely on root-associated ectomycorrhizal fungi for nutrient acquisition, in exchange the trees allocate part of their photosynthetically fixed carbon (C) to these fungi. This has a feedback on soil C dynamics as mycorrhizal fungi are important in regulating soil C cycling and storage. LÄS MER

  5. 5. The role of biological processes in base cation supply in boreal forest podzols

    Detta är en avhandling från ; Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences

    Författare :Zaenab Al-Azzawi; Sveriges lantbruksuniversitet.; [2017]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis describes experiments designed to improve understanding of biological processes contributing to supply of base cations and other nutrients in boreal forest podzols. We used microcosms containing tree seedlings growing in natural substrates, a combination of direct measurements, modelling, stable Mg isotope analysis, and 13CO2 pulse-labelling. LÄS MER