Sökning: "wet meadow"

Visar resultat 6 - 9 av 9 uppsatser innehållade orden wet meadow.

  1. 6. Biogaspotential hos våtmarksgräs

    Uppsats för yrkesexamina på avancerad nivå, Institutionen för geovetenskaper

    Författare :Marvin Martins; [2009]
    Nyckelord :haymaking; biogas potential; co-digestion; retention time; grass; sedge; energy value; heating value; TUVA; VMI; wetland; meadow marsh; wet meadow; cultivation; restoration; wildlife; GIS; SMD; economy; maps; slåtter; biogaspotential; samrötning; uppehållstid; gräs; starr; energivärde; värmevärde; TUVA; VMI; våtmark; mad; strandäng; fuktäng; hävd; restaurering; djurliv; GIS; SMD; ekonomi; kartor;

    Sammanfattning : BIOGAS POTENTIAL IN GRASSES FROM WETLANDS Marvin Martins The purpose of this study has been to survey wetlands that are suitable for mowing and to analyze the biogas potential in the harvested grasses. A preformed investigation showed that there are suitable wetlands, which can be harvestable, namely those mowed formerly in traditional haymaking. LÄS MER

  3. 7. Thermal pre-treatment of cellulose rich biomass for biogas production

    L3-uppsats, SLU/Dept. of Microbiology

    Författare :Pauline Demetriades; [2008]
    Nyckelord :biogas production potential; degradation rate; degradation potential; thermal pre-treatment; steam explosion; autohydrolysis; cellulose; lignin; oat straw; meadow grass; aspen; spruce; wet grain residue; batch experiment;

    Sammanfattning : Anaerobic digestion is one possible method to produce bioenergy from cellulose rich materials but the process techniques still need refinements to facilitate the production process. In this work the biogas potential from six different plant materials was evaluated and what effect a thermal pre-treatment had on this potential. LÄS MER

  4. 8. Nötkreaturens val av betesvegetation på naturliga betesmarker

    L3-uppsats, SLU/Dept. of Animal Nutrition and Management

    Författare :Maja Pelve; [2007]
    Nyckelord :bete; naturbetesmark; selektion; vegetationstyp; näringsvärde; nötkreatur; beteende;

    Sammanfattning : This study concerns the type of vegetation selected by cattle grazing on semi-natural pastures, and whether the selection depends on the nutrient content of the vegetation or on other factors. The study was carried out in three different semi-natural pastures in the Uppsala area during June, July and August in 2006. LÄS MER

  5. 9. Diversitet hos jordlöpare (Col: Carabidae) i hävdade strandnära gräsmarker

    L3-uppsats, SLU/Dept. of Crop Production Ecology

    Författare :David Isaksson; [2003]
    Nyckelord :jordlöpare; naturbetesmarker; fallfällor; Harpsund; Nötmyran; Pustnäs; agonum dolens; panageus cruxmajor; chlaenius nigricornis;

    Sammanfattning : The carabid community in moist seminatural grasslands was studied at three different sites in mid-Sweden. Pitfall trapping was carried out during six weeks in spring and early summer 2003. Eight transects, each containing seven pitfall traps, were placed in three different management regimes, either late or continous grazing, or meadow. LÄS MER