Sökning: "microbial biomass"

Visar resultat 1 - 5 av 33 uppsatser innehållade orden microbial biomass.

  1. 1. Explicit consideration of microbes in quantification of gross N rates based on N-tracing model

    Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaper

    Författare :Tsai-wei Tang; [2022-01-26]
    Nyckelord :N-tracing model; microbial biomass; gross N quantification; organic N; mineralization; immobilization;

    Sammanfattning : When studying the nitrogen cycle in soils, the principle of 15N isotope dilution and enrichment is commonly used to measure gross N transformation rates. The measuring data of both organic and inorganic nitrogen substrates are therefore be analysed by Ntrace model. LÄS MER

  2. 2. Elemental variability in tree-rings as indicator for climate change : a case study on beech and oak trees at the Laacher See, Germany

    Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :Ann-Kathrin Wild; [2022]
    Nyckelord :trace elements; tree-rings; dendrochemistry; dendroclimatology; ITRAX; Laacher See; mofettes; tree-bark; Quercus sp.; Fagus sp.;

    Sammanfattning : The aim of this study was to contribute to the comprehension of the connection of element uptake in trees at the Laacher See in Germany and climatic parameters on different time scales. Understanding the relationship of certain elements in trees and temperature might enable the assignment of extraordinary high peaks in the elemental concentration, which cannot be explained by temperature, to another process as CO2 degassing of the mofettes, which are relics of the volcanic past of the lake. LÄS MER

  3. 3. Microbial Carbonisation and its potential for on-farm composting : exploring reductive composting as an approach for regenerative agriculture

    Master-uppsats, SLU/Department of Biosystems and Technology (from 130101)

    Författare :Ludwig Peter Stephan; [2022]
    Nyckelord :on-farm composting; reductive composting; regenerative agriculture; microbial carbonisation; mikrobielle carbonisierung; greenhouse gas emissions;

    Sammanfattning : The search for agronomic solutions to the decline of soil health, open-ended nutrient cycles and greenhouse gas (GHG) emissions from agriculture, against the background of impending climate change, were motivations for this thesis. A composting trial on a Swedish farm was designed to find answers to the overarching research question of how feasible and climate-friendly on-farm composting using Microbial Carbonisation (MC) is, compared to conventional windrow composting (CC). LÄS MER

  4. 4. Bearbetningsmetoders påverkan på markorganismers aktivitet i jorden : i perenna odlingar samt i odlingssystem med mellangrödor

    Kandidat-uppsats, SLU/Department of Biosystems and Technology (from 130101)

    Författare :Jenny Olofsson; [2021]
    Nyckelord :markorganismer; respiration; organiskt material; odlingsmetoder; biologiska processer; kemiska processer och fysikaliska processer; perenna odlingssystem; mellangrödor; klimatförändringar; microbial activity; respiration; organic matter; soil tillage methods; biological processes; chemical processes and physical processes; perennial crops; conservation agriculture; intermediate crops; climate change;

    Sammanfattning : Klimatförändringarna, som både påverkat och påverkar vår planet, kräver att mänskliga aktiviteter förändras till mer resurssnåla och systemeffektiva processer. I dessa processer bör markens bördighet vara det centrala, eftersom en bördig mark kan generera stabila skördar och bidra till en långsiktigt hållbar matförsörjning. LÄS MER

  5. 5. Hur påverkas markorganismerna av jordbruksmetoden strukturkalkning?

    Kandidat-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Maria Gustavsson; [2021]
    Nyckelord :structural liming; agriculture; microorganisms; clay soil; respiration; earthworm population; Earth and Environmental Sciences;

    Sammanfattning : This field study was done to get an understanding of how the agricultural method called “structural liming” might affect soil organisms in a negative way. Soil organisms are crucial as they perform biological processes that improve good soil structure. This is important as it enables sustainable food production, today, and in the future. LÄS MER