Sökning: "nitrate leaching"

Visar resultat 1 - 5 av 22 uppsatser innehållade orden nitrate leaching.

  1. 1. Greenhouse gas emissions from peat soil thawing in spring : a comparison between fertilized and unfertilized soil

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Fanny Otterlin Karlsson; [2024]
    Nyckelord :agricultural soil; carbon dioxide; freeze-thaw cycles; nitrous oxide; soil temperature; water content;

    Sammanfattning : Peat soils drained for agriculture and forestry contribute to a significant amount of greenhouse gas emissions. Nitrous oxide is a greenhouse gas with high warming potential and agriculture in general accounts for about 70 % of nitrous oxide emissions. LÄS MER

  3. 2. Sustainable use of calcium nitrate fertilizer under variable precipitation, soil properties and crop management

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Liliana Marcela Daza Gomez; [2023]
    Nyckelord :nitrogen.; calcium nitrate; ammonium-based fertilizers; urea; nitrate leaching; nitrous oxide emissions; crop yield;

    Sammanfattning : Application of nitrogen fertilizers in agriculture contributes substantially to global greenhouse gas emissions and nitrogen leaching. Accordingly, there is a need to increase knowledge about sustainable farming practices to reduce nitrogen losses to the environment without curtailing crop harvest. LÄS MER

  4. 3. Ammonium and nitrate sorption by biochar

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Yasser Alrhban; [2023]
    Nyckelord :biochar nitrogen; retention; dialysis; absorption; adsorption; ammonium; nitrate;

    Sammanfattning : Biochar has recently drawn attention due to its ability to increase soil fertility, sequester carbon and its expected effect on reducing the leaching of elements from the soil, especially nitrogen. The possibility of using biochar as a soil amendment to reduce the amount of nitrogen leaching, and then reducing the quantities of nitrogen fertilizers used in agriculture to avoid the bad environmental effects has become a matter of great interest. LÄS MER

  5. 4. Effects of cover crops on nitrous oxide (N2O) emissions in cereal cropping

    Master-uppsats, SLU/Dept. of Ecology

    Författare :Khadija Aziz; [2022]
    Nyckelord :cover crops; nitrous oxide; C sequestration; greenhouse gases; off-season emissions; freeze-thaw cycles;

    Sammanfattning : More than 60% of anthropogenic nitrous oxide (N2O) emissions are attributed to agricultural activities. N2O production in soils highly depends on the N availability along with other factors such as soil moisture content, which provide suitable conditions for nitrification and denitrification. LÄS MER

  7. 5. Bedömning av kvävestatus i stärkelsepotatis : en jämförelse mellan olika metoder

    Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Soil and Environment

    Författare :Elin Carlsson; [2022]
    Nyckelord :kväve; kompletteringsgödsling; bladskaftsanalys; Yara N-sensor; Yara N-tester; fjärranalys med Vultus system;

    Sammanfattning : Kväve är ett viktigt näringsämne för växten eftersom det fyller många viktiga funktioner, bland annat som byggstenar till proteiner som ingår i fotosyntesen men också klorofyllmolekyler, DNA och RNA. Tillförseln av kväve är viktig att optimera i stärkelsepotatis (Solanum tuberosum) utifrån kvävepris, stärkelsehalt och skörd men också för aspekten att minska utlakning. LÄS MER