Poiša, Liena

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Preferred name
Poiša, Liena
Official Name
Poiša, Liena
Alternative Name
Poisa, Liena
Liena Poisa
Poisa, L
Main Affiliation
Email
liena.poisa@rta.lv
ORCID
Scopus Author ID
55014398000
Researcher ID
HJZ-3782-2023

Research Output

Now showing 1 - 2 of 2
  • Publication
    The Chemical Content Of Different Energy Crops
    (2011)
    Poiša, Liena 
    ;
    A. Adamovičs
    ;
    L. Antipova
    ;
    G. Šiaudinis
    ;
    D. Karčauskienė
    ;
    R. Platače
    ;
    A. Žukauskaitė
    ;
    S. Malakauskaitė
    ;
    Teirumnieka, Ērika 
    The paper presents the data of gaseous and alkali elements in above-ground biomass of energy crops. The investigations objects were Phalaris arundinacea L., Populus nigra, Artemisia vulgaris, Sylphium perfoliatum, Sida hermaphrodita, Dactylis glomerata, Salix viminalis, Medicago sativia L. The aim of the research: to evaluate the amount of chemical elements in energy crops. Evaluating the energy crops it can be seen, that the most alkaline metals are contained in Sida hermaphrodita, and the least in Sylphium perfoliatum L.
    Scopus© Citations 3
  • Publication
    Evaluation of the Factors that Affect The Lignin Content in The Reed Canarygrass (Phalaris arundinacea L.) in Latvia
    (2011)
    Poiša, Liena 
    ;
    Aleksandrs Adamovics
    ;
    Rasma Platace
    ;
    Teirumnieka, Ērika 
    : In the production of granules from plants the cohesive substance lignin has a great importance, as it holds the granule together and does not allow it to disintegrate. The objective of this research was to evaluate the influencing factors of lignin content in reed canarygrass (Phalaris arundinacea L.) crop yield. In this research the varieties of reed canarygrass ‘Marathon’ and ‘Bamse’ were analysed for yields of first and second year. The lignin content of the samples was established by Classon's method. Arsenic (As), Cadmium (Cd), and Lead (Pb) and other chemical elements were established in the reed canarygrass samples with the spectrometer Optima 2100DV. The reed canarygrass second year crop yield was 3-4 times greater than the first year crop yield. A significantly correlation (p<0.05) was established in the first crop yield October samples between lignin and natrium (Na). Some correlation relationships are contradictory, which confirms that within the plant growth period the meteorological conditions are of great importance. Analysing the determining factors of lignin content it can be seen that they were influenced by the interaction of various factors - the sowing and growing period, the variety and the N-fertilizer rate application.