Sökning: "growing degree-days"

Visar resultat 1 - 5 av 13 uppsatser innehållade orden growing degree-days.

  1. 1. Multi-environment Screening of Timothy (Phleum pratense) Breeding Material for Better Forage Yield in Sweden.

    Master-uppsats, SLU/Dept. of Plant Breeding (from 130101)

    Författare :Ibrahim Issa; [2022]
    Nyckelord :Phleum pratense; Multi-Environment; Forage yield; Sweden; Genotype-by-environment interaction Swedish;

    Sammanfattning : Timothy (Phleum pratense) is one of the most widely used forage crops in hay and pasture grass mixtures in Nordic countries; it’s also used in areas where it is one of the top forage crops harvested high yield, especially in boreal climates. There hasn’t been any large-scale breeding of Timothy to develop varieties that are adapted for Swedish climate and standards, which is surprising given that Timothy is the main forage crop used in Sweden. LÄS MER

  3. 2. Germination dynamics of soybean cultivars in relation to common spring germinating weeds

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

    Författare :Sofie Pålsson Andersson; [2021]
    Nyckelord :soybean; cardinal temperatures; base temperature; cold tolerance; germination; Nemoral climatic zone; weeds;

    Sammanfattning : Soybeans are one the most traded crops in the world with main production areas in north and south America. Europe only produces 5 % of its domestic need for soybean. In the Nemoral zone of northern Europe no commercial cultivation of soybeans exists today. LÄS MER

  4. 3. Can ambient temperature patterns predict fireweed phenology?

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

    Författare :Jennifer Chaimungkhun Johansson; [2021]
    Nyckelord :fireweed; Chamaenerion angustifolium; growing degree-days; camera trap; phenology;

    Sammanfattning : The Earth’s climate has been changing with greater intensity and frequency in recent years. These changes, especially the warmer climate, have advanced plant phenology, thus increasing the risk of interspecific temporal mismatches, for example pollinators and pollinated flower species. LÄS MER

  5. 4. Impact of environmental variables on tundra vegetation onset of flowering explained by survival modelling

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Hanna Jonsson; [2019]
    Nyckelord :Flowering; Phenology; Cox proportional hazard model; Tundra; International tundra experiment; Climate change; Physical Geography and Ecosystem analysis; Earth and Environmental Sciences;

    Sammanfattning : Timing of phenological events are highly related to climate and is one of the first signs of ecosystem responses to the climate change. Timing of flowering phenology is an important trait influencing the distribution and fitness of plants species. LÄS MER

  7. 5. Statistical Modelling of Permafrost Extent in the Circum-Arctic Region

    Kandidat-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Patricia Koch; [2018]
    Nyckelord :permafrost; soil organic carbon; growing degree days; statistical modelling; Earth and Environmental Sciences;

    Sammanfattning : Permafrost regions cover approximately a quarter of the Northern Hemisphere and thawing has been recorded in many different locations. The thawing process is likely to continue given that the Northern Latitudes will experience increased warming, which is known as the Arctic Amplification Factor. LÄS MER