Sökning: "abiotic parameters"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden abiotic parameters.

  1. 1. Nitrogen fixation in wheat (Triticum aestivum) : effect of Azotobacter salinestris CECT 9690 on N-accumulation

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

    Författare :John Pålsson; [2023]
    Nyckelord :Biostimulants; Vixeran; N-uptake; N-concentration; yield; cereals;

    Sammanfattning : Biostimulants are products that can improve nutrient availability, nutrient uptake, nutrient use efficiency and tolerance to abiotic stress with the aim to increase plant growth and yield. During the last decades, the interest in, and market for biostimulants has grown and is expected to have a large compound annual growth rate. LÄS MER

  3. 2. Water quality and organic matter linkages in waters draining arable fields

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

    Författare :Adam Eriksson; [2021]
    Nyckelord :Natural organic matter NOM ; particular organic matter POM ; dissolved organic matter DOM ; allochthonous; autochthonous; Florescence index FIX ; Freshness index BIX ; Humification index HIX ; SUVA 254; E2:E3; Spectral Slope; Observation fields; microbial matter; humic matter; unfiltered samples UF ; filtered samples F45 ;

    Sammanfattning : This study investigated leaching of natural organic matter (NOM) in twelve Swedish arable fields with regards to the quality of dissolved organic matter (DOM) and particulate organic matter (POM), using Absorbance (UV-Vis) and fluorescence spectrometry (EEM). DOM is defined as organic matter (OM) 0.45 μm. LÄS MER

  4. 3. The influence of diel cycles on the bacterial community composition of two boreal lakes : A case study in Jämtland

    Master-uppsats, Uppsala universitet/Limnologi; Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Sofia Papadopoulou; [2021]
    Nyckelord :freshwater; lake; diel cycle; bacterioplankton; bacterial community composition;

    Sammanfattning : In the Boreal region, the length of day and night varies extremely over the year and organisms are exposed to different diel (24 h) fluctuations of light and temperature. Among them are pelagic populations of bacteria that are ubiquitous in freshwater ecosystems. LÄS MER

  5. 4. The effect of the interplay between fire frequency and grassland structure on tick abundances in the Hluhluwe-iMfolozi Park, South Africa

    Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Thilo Heinecke; [2020]
    Nyckelord :ticks; acari; pyrodiversity; grassland structure; fire ecology; fire frequency; grazing lawn;

    Sammanfattning : Fire in ecology is a very variable factor and its effects are best described as a complex feedback system with other biotic and abiotic factors. These feedback systems need to be understood to enable generalized conclusions about the influence of fire regimes. LÄS MER

  7. 5. Photosynthesis response to temperatures – A study of fertilized and unfertilized Picea abies : Fotosyntes i respons till temperatur – En studie av gödslad och ogödslad Picea abies

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för skog och träteknik (SOT)

    Författare :Anna Schyman; [2018]
    Nyckelord :photosynthesis; CO2; nitrogen; Picea abies; Rubisco;

    Sammanfattning : The effect climate change has on forest trees is a large scaled topic. It is to believe that one of the largest threat to the environment today is global warming (IPPC, 2007). The use of fossil fuels seems to be the big threat with its greenhouse gas (GHG) emission and therefore forest is of interest. Forest contributes in several ways. LÄS MER