Sökning: "Soil respiration"

Visar resultat 11 - 15 av 58 avhandlingar innehållade orden Soil respiration.

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

    Författare :Andreas Hagenbo; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    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

  3. 12. Soil microbial responses to mild winters and seasonal change

    Författare :Johanna Birgander; Biodiversitet; []
    Nyckelord :Arbuscular mycorrhizal fungi AMF ; RESPIRATION; Stable isotope; Fungal growth; PLFA; NLFA; Microbial community composition; bacterial growth; Aboveground-belowground interactions; Temperature adaptation; Climate change;

    Sammanfattning : The aim with this thesis work was to study microorganisms response to milder winters, different seasons, and altered temperature. Winter warming treatments were established in a semi-natural temperate grassland, simulating mild winters for two years. LÄS MER

  4. 13. Compost and fertilizer - alternatives or complementary? : management feasibility and long-term effects on soil fertility in an Ethiopian village

    Författare :Workneh Bedada Chala; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Decline in soil fertility due to nutrient depletion is a concern for low-input crop production in the highlands of Ethiopia. Fertilizer addition is insufficient due to infrastructural and socioeconomic constraints. LÄS MER

  5. 14. Impact of root and mycorrhizal exudation on soil carbon fluxes : influence of elevated CO2 and metals

    Författare :Emma M. Johansson; Patrick van Hees; Bert Allard; Phil Ineson; Örebro universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; amino acids; 13C; carbon cycle; ectomycorrhiza; elevated CO2; exudation; DOC; LMWOA; metal stress; monosaccharides; oxalate; Pinus sylvestris; saprotrophic fungi; soil respiration; NATURAL SCIENCES; NATURVETENSKAP; Environmental chemistry; Miljökemi; Enviromental Science; Miljövetenskap;

    Sammanfattning : The thesis concerns the behavior of root and ectomycorrhizal (ECM) exudates. In particular, the dynamics of soluble low molecular weight (LMW) organic compounds such as organic acids (LMWOAs), amino acids, monosaccharides, and dissolved organic carbon (DOC) have been studied. LÄS MER

  7. 15. Climate Change sensitivity of Photosynthesis and Respiration in Tropical Trees

    Författare :Myriam Mujawamariya; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Carbon dioxide; Climate change; Drought; Elevation gradient; Photosynthesis; Respiration; Tropical montane forest; Tropical trees; Warming;

    Sammanfattning : Tropical climate is getting warmer, with more pronounced dry periods in large areas. The productivity and climate feedbacks of future tropical forests depend on the ability of trees to acclimate their physiological processes, such as photosynthesis and leaf respiration, to these new conditions. LÄS MER