Mona Bakke Myrvang

• Myrvang, Mona Bakke; Heim, Michael; Krogstad, Tore; Almås, Åsgeir R. & Gjengedal, Elin Lovise Folven (2017). The use of carbonatite rock powder as a liming agent. Zeitschrift für Pflanzenernahrung und Bodenkunde. ISSN 1436-8730. 180(3), s. 326–335. doi: 10.1002/jpln.201600455. Vis sammendrag

  Carbonatite rock powder, originating from the Lillebukt Alkaline Complex at StjernOy in northern Norway, can potentially be used as a slow-releasing lime and potassium (K) and magnesium (Mg) fertilizer due to a high concentration of the easily weathered minerals calcite (42%) and biotite (30%). However, the enrichment of barium (Ba) and strontium (Sr) may cause an undesired uptake to plants when carbonatite is applied to agroecosystems. A pot experiment was designed to investigate the liming and fertilization effects of carbonatite and the potential mobilization of Ba and Sr compared to a dolomite lime commonly used in Norwegian agriculture. These liming agents were mixed with a sandy soil applied to different amounts of peat, and the uptake of Ba, Sr, calcium (Ca), Mg, and K by Festuca arundinacea Schreb. Kora (tall fescue) and Trifolium repens L. Milkanova (white clover) was evaluated. The liming agents were generally incapable of buffering the acidifying effect from increased applications of peat, while the plant dry mass was unaffected. Compared to pots given dolomite and soluble K, the availability of K from carbonatite to plants was equally high or higher, and no difference in the K:(Ca + Mg) ratio in plants was observed. Carbonatite was a significant source to plant Ba and Sr, and the uptake seemed to follow the Ca uptake. Addition of peat amplified the uptake of Ba, Sr, Ca, Mg, and K to plants, probably an effect of organic acid-induced weathering of carbonatite. White clover took up Ba, Sr, and Ca more effectively than tall fescue, but the Ba and Sr concentrations in plants were relatively moderate compared to concentrations reported from field investigations.

• Myrvang, Mona Bakke; Hillersøy, Maria Hestholm; Heim, Michael; Bleken, Marina Azzaroli & Gjengedal, Elin Lovise Folven (2016). Uptake of macro nutrients, barium, and strontium by vegetation from mineral soils on carbonatite and pyroxenite bedrock at the Lillebukt Alkaline Complex on Stjernøy, Northern Norway. Zeitschrift für Pflanzenernahrung und Bodenkunde. ISSN 1436-8730. 179(6), s. 705–716. doi: 10.1002/jpln.201600328.
• Myrvang, Mona Bakke; Gjengedal, Elin Lovise Folven; Heim, Michael; Krogstad, Tore & Almås, Åsgeir R. (2016). Geochemistry of barium in soils supplied with carbonatite rock powder and barium uptake to plants. Applied Geochemistry. ISSN 0883-2927. 75, s. 1–8. doi: 10.1016/j.apgeochem.2016.10.013.
• Myrvang, Mona Bakke; Bleken, Marina Azzaroli; Krogstad, Tore; Heim, Michael & Gjengedal, Elin Lovise Folven (2016). Can liming reduce barium uptake by agricultural plants grown on sandy soil? Zeitschrift für Pflanzenernahrung und Bodenkunde. ISSN 1436-8730. 179(4), s. 557–565. doi: 10.1002/jpln.201600104.

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• Cottis, Thomas; Solberg, Svein Øivind; Myrvang, Mona Bakke & Mousavi, Hesam (2022). Regionale gjødselressurser: avlingseffekt av biokull i blanding med biorest. Resultater fra Høgskolen i Innlandet sitt arbeid i 2021. Skriftserien Høgskolen i Innlandet. ISSN 2535-5678. doi: 10.13140/RG.2.2.34562.15046.
• Bakke, Mona; Bleken, Marina Azzaroli; Heim, Michael; Krogstad, Tore & Gjengedal, Elin Lovise (2013). ARE LEGUMES ACCUMULATORS OF BARIUM IN SANDY MINERAL SOIL? Vis sammendrag

  Plant uptake of barium (Ba) in natural vegetation has shown large variation among plant species and plant parts. In spite of the toxicity of soluble Ba compounds to animals and humans, the mechanisms controlling Ba-availability and -uptake in plants are scarcely investigated. The aim of this study was to investigate interspecies differences, and treatment effect of lime and nitrogen (N-) fixation on Ba-uptake in agricultural plants. Representatives from grass, corn, vegetables, and herbs were grown in a greenhouse experiment. Plants were grown in a fixed, pH regulated, sandy growth medium. Hydrofluoric acid soluble content of Ba in the sand was 350 ± 12 mg kg-1. Each species was fertilized for optimal growth conditions and harvested at a mature or flowering state. Plant samples were divided into respective plant parts, dried, ground and acid digested using microwave technique prior to analysis by means of ICP-MS. Content of Ba in the different plant species ranged from 60 (grass) to 700 (legumes) mg kg-1 dry matter. Regarding plant parts Daucus carota L. spp (carrot) had lowest Ba content in roots, while Spinacia oleracea (spinach) and Pisum sativum (peas) showed tendency of highest content in roots. Statistical interpretations regarding liming effect, N-fixation and Ba uptake versus nutrients will be presented.

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