Students and staff

Laboratory of Plant Mineral Nutrition

Laboratory of Plant Mineral Nutrition

Address: Riga, Ojāra Vācieša street 4, LV-1004
Tel: +371 67945417; mob.: +371 25615920

e-mail: augi@lu.lv  

Head: Dr. biol. Anita Osvalde
Staff: 6 (Dr. Biol. - 4, Mg. - 1)

Investigations in the laboratory are focused on different aspects of plant physiology (mineral nutrition, plant protection mechanisms, adaptation, etc.) under conditions of stress caused by disbalance of biogenic elements, heavy metals and salt toxicity in the growing environment.

The main research directions

  • Development of complex diagnostics and mineral nutrition optimization of different crop cultures (rape, winter wheat, vegetables, greenhause vegetables) with substantial value in economics of Latvia. Particular attention is paid on development of mineral nutrition regime for untraditional fruit cultures in Latvia – American cranberries, highbush blueberries, lingonberries, cloudberries.
  • Balanced mineral nutrition for tree seedlings (pine, spruce, aspen, lime trees, etc.).
  • Biochemical protection mechanisms of plants in the conditions of nutrient imbalance and stress caused by various environmental factors.
  • Peculiarities of mineral nutrition of wild plants.
  • Impact of environmental factors on mineral nutrition of different tree species in urban environment and forest.

Scientific and practical cooperation

Based on the results of theoretical research, the laboratory has successfully participated in applied research and consulting activities, establishing close cooperation with industrial companies in Latvia (JSC "Chemical plant" Spodrība",  „Laflora” Ltd., JSC" Līgo ", Ltd" Lienama-Alūksne ", etc.) ), state and local government institutions (JSC “Latvijas valsts meži”, Ltd. “Rīgas meži”, Riga City Council) in the field of optimization of mineral nutrition for various agricultural crops, forest and greenery plants. The laboratory has developed new compositions of  two- and three- component nutrient solutions “Vito“series, produced in JSC „Chemical plant “Spodrība”  and peat substrates for different plant cultures, which are produced in “Laflora” Ltd. Invention “Two – component nutrition solution “Vito is protected by patent Nr. 12677 (the author – Dr. biol. V. Nollendorfs).

International collaboration

The laboratory has international collaboration in the field of urban environmental pollution impact on plants and urban ecosystem with the scientists of Swiss Federal Institute for Forest, Snow and Landscape Research (WSL) and Institute of Biology of the University of Neuchatel in Switzerland; element microlocalisation in plants – Centre INRA in France; invasive plant species biology and factors affecting plant species distribution in urban ecosystems - Vytautas Magnus University in Kaunas, Lithuania, etc.

State awards for merits in favor of Latvia

We are very proud that our colleague Dr. biol. V. Nollendorfs received the award of the Latvian Employers' Confederation "For Innovations in Entrepreneurship", was a laureate of the competition 'Sējējs 2009" organized by Ministry of Agriculture of the Republic of Latvia in nomination 'For Life Contribution in Agriculture'. In 2012, Dr. biol. V. Nollendorfs became a honorary member of Latvian Peat Producers Association, but in 2014, he was awarded by The Cross of Recognition of the Republic of Latvia for great achievements in agricultural and forest science.

Scientific and practical service possibilities

  • Complex diagnostics of plant mineral nutrition, determining the 12 essential nutrients - N, P, K, Ca, Mg, S, Fe, Mn, Zn, Cu, Mo, B, as well as salinity (Na, Cl) in soils (substrates), plant material and irrigation water to evaluate plant nutrient status.
  • Environmental monitoring research - determination of nutrients and heavy metals in various objects of biological origin to assess the environmental quality.
  • Assessment of the impact of products of organic origin on the nutrient supply of plants.
  • Development of new compositions of nutrient solutions and peat substrates for for growing and fertilizing different agricultural and ornamental crops.

Laboratory equipment for research and services

The laboratory has necessary equipment for soil characteristics, plant nutrient and plant ecophysiology studies:

  • Microwave plasma atomic emission spectrometer AES (MP-AES) 4210 Agilent Technologies
  • Atomic absorption spectrometer - Perkin-Elmer AAnalyst 700, Perkin-Elmer 403;
  • Spectrophotometer - JENWAY 6300;
  • Chlorophyll meter - Konica Minolta SPAD-502PLUS;
  • Leaf porometer SC-1;
  • Equipment for measuring photosynthetic and transpiration intensity (gas exchange measurements) – LCi-SD, ADC BioScientific Ltd.;
  • High performance microwave digestion system - Milestone Ethos One.
  • Etc.

Link to scientific service prices

Currently implemented projects

  • “Biological diversity – impacts, functions and protection”, subproject “Biological research of living organisms in urban, rural and aquatic ecosystems”, No AAP2016/B034, ZD2015/AZ81, Ministry of Education and Science of Latvia, 2016-2024
  • “Mineral nutrition monitoring of forest seedlings by water, substrate and plant analysis for nurseries of Latvia State forests”, the State Joint Stock company “Latvia State forests”, 2002-2024.

Implemented projects

EU financed projects

The Scientific Exchange program NMS-CH (Sciex)

“Compartmentation of de-icing salts and structural reactions to salt accumulation in foliage of declining street trees (Tilia x vulgaris) from Riga, Latvia” (Sal-Ti). The Swiss-Latvian collaboration project, Sciex project No. 14.038. 2014-2016.

Projects of the Latvian Council of Science

  • “Biological plant protection, biodiversity conservation and the role of plant mineral nutrition in global changing environment”, Nr.09. 1549, 2010-2012.
  • “The role of mineral nutrition in plant adaptive response to global climate change and anthropogenic stress factors”, Nr.09. 1361, 2009.
  • “Plant adaptive responses to stress conditions caused by toxicity of heavy metals (Pb, Hg, Cd) in substrate”, Nr. 05.1407, 2005-2008.
  • “Biochemical protection mechanisms of plants under conditions of stress caused by a disbalance of microelements – heavy metals (Cu, Zn, Mn) in substrate”, Nr. 01.0475, 2001-2004.

Other scientific projects

  • „Examination of  berry cultivars prospective for integrated cultivation in different climatic regions of Latvia, as well as development and improvement of cultivation technologies”,  Ministry of Agriculture of Latvia, 2015-2020.
  • “Scientific research on natural habitats”, “National Botanic Garden”, 2016.
  • "Elaboration of system for environmental and water friendly cultivation technologies of appropriate fruit variety assortment and integrated plant protection in different agroclimatic conditions", No 211211/C-120, Ministry of Agriculture of Latvia, 2012-2014.
  • "Monitoring of Norupe’s nursery based on water, substrates, needles or leaf analysis", scientific applied project in cooperation with Ltd. "Rīgas meži": 2012.
  • “Specification of environment-friendly technologies in fruit and berry plantations in different soil, and climatic conditions”, Ministry of Agriculture of Latvia, 2007-2011.
  • “Monitoring of young street trees of Riga based on soil and leaf analysis”, project of Environmental Department of Riga Council, 2008.
  • “Degradation of Norway spruce stands in Latvia: reasons and measures for possible solutions”, Ministry of Agriculture of Latvia, 2007-2008.
  • “Possibilities of gypsum use as soil fertilizer for vegetable supply with calcium and sulphur”, Ministry of Agriculture of Latvia, 2006.
  • „Investigations on rape mineral nutrition diagnostics and fertilization optimization”, Ministry of Agriculture of Latvia, 2006.
  • “Biological basis of the conservation of rare and endangered species of Latvia: coastal zone”, University of Latvia, 2005-2006.
  • “Development of integrated fertilization technologies for new berry cultures: American cranberries and highbush blueberries in cutover high bogs”, Ministry of Agriculture of Latvia, 2005.
  • „Investigations on winter wheat mineral nutrition diagnostics and fertilization optimization”, Ministry of Agriculture of Latvia, 2005.
  • “Monitoring of Riga greenery based on soil and leaf analysis”, Project of Environmental Department of Riga Council 2003-2004.

Laboratory staff

Anita Osvalde

Dr. biol.

head of the laboratory,

leading researcher

anita.osvalde@lu.lv

augi@lu.lv

26167529

Andis Karlsons

Dr. biol.

leading researcher

andis.karlsons@lu.lv

27044753

Gunta Čekstere

Dr. biol.

leading researcher

gunta.cekstere@lu.lv

29436586

Laura Āboliņa

Mg.envir.sc.

scient. assistant

laura.abolina@lu.lv

67945417

Vilnis Nollendorfs

Dr. biol.

consultant

(volunteer)

augi@lu.lv

29276971

Inese Veinberga

-

technical staff

inese.veinberga@lu.lv

67945417

Collective monograph

Nollendorfs, V., Osvalde, A., Čekstere, G., Karlsons, A., Āboliņa, L. 2023. Diagnosis of plant mineral nutrition and optimisation of fertilisation. Rīga: University of Latvia Press,  240 pp. ISBN 978-9934-18-923-4.

2024

Jēkabsone, A., Karlsons, A., Osvalde, A., Ievinsh, G. 2024. Effect of Na, K and Ca salts on growth, physiological performance, ion accumulation and mineral nutrition of Mesembryanthemum crystallinum. Plants, 13, 190. https://doi.org/10.3390/plants13020190

Osvalde, A., Karlsons, A., Cekstere, G., Āboliņa, L., Malecka, S. 2024. Foliar application of commercial humic substances for possible increase of nutrient status and yield of oilseed rape. Environmental and Experimental Biology, 22, 1–9. http://doi.org/10.22364/eeb.22.01

Purmale, L., Osvalde, A.,  Karlsons, A., Ievinsh, G. 2024. Comparison of two subspecies of a halophytic multi-use plant Mertensia maritima in vitro and ex vitro: propagation, salinity tolerance and mineral nutrition. Environmental and Experimental Biology, 22, 29–40. http://doi.org/10.22364/eeb.22.04

2023

Āboliņa, L., Osvalde, A., Karlsons, A. 2023. Habitat characteristics and mineral nutrition status of Rubus chamaemorus L. in Latvia. Plants, 12, 528. https://doi.org/10.3390/plants12030528

Osvalde, A., Karlsons, A., Cekstere, G., Āboliņa, L. 2023. Leaf nutrient status of commercially grown strawberries in Latvia, 2014–2022: a possible yield-limiting factor. Plants, 12, 945. https://doi.org/10.3390/plants12040945

Gailite, A., Andersone-Ozola, U., Samsone, I., Karlsons, A., Ievinsh, G. 2023. Ecophysiology of endangered plant species Saussurea esthonica: effect of mineral nutrient availability and soil moisture. Plants, 12, 888. https://doi.org/10.3390/plants12040888

Karlsons, A., Osvalde, A., Cekstere, G., Āboliņa, L. 2023. Effects of Ca sprays on fruit Ca content and yield of tomato variety susceptible to blossom-end rot. Plants, 12, 1640. https://doi.org/10.3390/plants12081640

Ieviņa, S., Karlsons, A., Osvalde, A., Andersone-Ozola, U., Ievinsh, G. 2023. Coastal wetland species Rumex hydrolapathum: tolerance against flooding, salinity, and heavy metals for its potential use in phytoremediation and environmental restoration technologies. Life, 13, 1604. https://doi.org/10.3390/life13071604

2022

Jēkabsone, A., Andersone-Ozola, U., Karlsons, A., Neiceniece, L., Romanovs, M., Ievinsh, G. 2022. Dependence on nitrogen availability and rhizobial symbiosis of different accessions of Trifolium fragiferum, a crop wild relative legume species, as related to physiological traits. Plants, 11 (9), 1141. https://doi.org/10.3390/plants11091141.

Jēkabsone, A., Andersone-Ozola, U., Karlsons, A., Romanovs, M., Ievinsh, G. 2022. Effect of salinity on growth, ion accumulation and mineral nutrition of different accessions of a crop wild relative legume species, Trifolium fragiferum. Plants, 11 (6), 797. doi.org/10.3390/plants11060797.

Purmale, L., Jekabsone, A., Andersone-Ozola, U., Karlsons, A., Osvalde, A., Ievinsh, G. 2022. Comparison of In Vitro and In Planta Heavy Metal Tolerance and Accumulation Potential of Different Armeria maritima Accessions from a Dry Coastal Meadow. Plants, 11, 2104. https://doi.org/10.3390/plants11162104.

Karlsons, A., Osvalde, A. Abolina, L. 2022. Nitrogen and phosphorus effect on American cranberry growth, yield and mineral element composition. Conference proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022, July 2-11, Albena, Bulgaria, Vol. 22, Issue 3.1., 267-274. 10.5593/sgem2022/3.1/s13.33

Osvalde, A., Klavina, D., Jakobsone, G. 2022. Factors potentially causing differences in seed viability of Pulsatilla patens populations in Latvia: a pilot study. Conference proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022, July 2-11, Albena, Bulgaria, Vol. 22, Issue 5.1, 175 - 182.  10.5593/sgem2022/5.1/s20.023

Ievinsh, G., Landorfa-Svalbe, Z., Andersone-Ozola, U., Karlsons, A., Osvalde, A. 2022. Salinity and heavy metal tolerance, and phytoextraction potential of Ranunculus sceleratus plants from a sandy coastal beach. Life, 12, 1959. doi.org/10.3390/life12121959.

2021

Cekstere, G., Osvalde, A., Karlsons, A., Strauts, G. 2021. Nutrient status of tomatoes grown in hydroponics during the crop cycle as a factor involved in fruit yield and quality. Acta Hortic. 1321, 109-116. DOI: 10.17660/ActaHortic.2021.1321.14, https://doi.org/10.17660/ActaHortic.2021.1321.14

Osvalde, A., Karlsons, A., Cekstere, G. 2021. Leaf nutrient status of tomatoes in coconut coir medium – differences in varieties, impact on yield and quality. Agronomy Research 19(4), 1850–1862,  https://doi.org/10.15159/AR.21.110.

Karlsons, A., Tomsone, S., Lazdāne, M., Osvalde, A. 2021. Effect of fertilization on growth of lingonberry (Vaccinium vitis-idaea L.). Agronomy Research, 19, SI 2, 1039–1051,https://doi.org/10.15159/AR.21.041.

Lepse, L., Zeipiņa, S., Missa, I., Osvalde, A. 2021.The effect of cultivation technology on the plant development of organically grown garlic. Agronomy Research 19(4), 1823–1829. https://doi.org/10.15159/AR.21.102.

Osvalde, A., Jakobsone, G., Akmane, I., Svilāns, A., Dubova I. 2021. Dianthus superbus as a critically endangered species in Latvia: evaluation of its growth conditions and conservation possibilities. AoB PLANTS, 13 (5), plab051, https://doi.org/10.1093/aobpla/plab051

Osvalde, A., Karlsons, A., Cekstere, G. 2021. Comparison of rockwool and peat substrates for the hydroponic production of greenhouse cucumbers. Conference proceedings of 21st International Multidisciplinary Scientific GeoConference SGEM 2021, August 14-22, Albena, Bulgaria, Vol. 21,  Issue 3.1. 427-434.10.5593/sgem2021/3.1/s13.54

Jakobsone, G., Osvalde, A., Ruņģis, DE, Svilāns, A. 2021. First genetic conformation of  Nymphaea tetragona in Latvia. Conference proceedings of 21st International Multidisciplinary Scientific GeoConference SGEM 2021, August 14-22, Albena, Bulgaria, Vol. 21, Issue 5.1., 221-228.10.5593/sgem2021/5.1/s20.028

Laiviņš M., Čekstere G., Kaupe D. 2021. Nemoralisation of Pinus sylvestris and Picea abies Forest Stands in the Hemi-Boreal Zone: A Case Study from Latvia. Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences, 75(4), 299-309; doi.org/10.2478/prolas-2021-0043

2020

Ievinsh, G., Dišlere, E., Karlsons, A, Osvalde, A., Vikmane, M., 2020. Physiological responses of wetland species Rumex hydrolapathum to increased concentration of biogenous heavy metals Zn and Mn in substrate. Proc. Latvian Acad. Sci., Section B, Vol. 74 (1), 35-47.DOI: 10.2478/prolas-2020-0006.

Ievinsh, G., Andersone-Ozola, U., Landorfa-Svalbe, Z., Karlsons, A., Osvalde, A. 2020. Wild plants from coastal habitats as a potential resource for soil remediation. Soil Health. (Soil Biology; Vol. 59). Switzerland: Springer Nature AG, 121-144. doi.org/10.1007/978-3-030-44364-1_8.

Osvalde, A., Karlsons, A., Cekstere, G. 2020. Diagnostics of nutrient status of soil for highbush blueberries in Latvia, 2014-2018. Acta Horticulturae, Vol. 1289, 295-301. DOI 10.17660/ActaHortic.2020.1289.42.

Cekstere, G., Osvalde, A., Elferts, D., Rose, C., Lucas, F., Vollenweider, P. 2020. Salt accumulation and effects within foliage of Tilia × vulgaris trees from the street greenery of Riga, Latvia. Science of the Total Environment, 747, article No 140921, doi.org/10.1016/j.scitotenv.2020.140921

Druva-Lusite, I., Karlsons, A., Andersone-Ozola, U., Ievina, B., Nečajeva, J., Samsone, I., and Ievinsh, G. 2020. Physiological performance of a coastal marsh plant Hydrocotyle vulgaris in natural conditions in relation to mineral nutrition and mycorrhizal symbiosis. Proc. Latvian Acad. Sci., Section B, Vol. 74 (4), 252–262. DOI: 10.2478/prolas-2020-0040.

2019

Jakobsone, G., Osvalde, A. 2019. Pecularities of calcium and iron effects on some wild terrestrial orchids in vitro and in vivo. In Vitro Cellular & Developmental Biology-Plant, 55:121–131. DOI 10.1007/s11627-019-09959-5.

Karlsons, A., Osvalde, A. 2019. Effect of foliar fertilization of microelements on highbush blueberry (Vaccinium corumbosum L.) nutrient status and yield components in cutover peatlands. Agronomy Research 17(1), 133–143, 2019 doi.org/10.15159/AR.19.028

Alle, V., Osvalde, A., Vikmane, M., Kondratovičs, U. 2019. The effect of cadmium and lead pollution on growth and physiological parameters of field beans (Vicia faba). Agronomy Research 17(S2), 1261–1272, doi.org/10.15159/AR.19.062.

Karlsons, A., Cekstere, G., Osvalde, A. 2019. Effect of elemental sulfur on soil acidification for highbush blueberries in Latvia – a pilot study. Conference Proceedings of 19th International Multidisciplinary Scientific Geoconference SGEM 2019, 30 June - 6 July. Water Resources. Forest, Marine and Ocean Ecosystems (Soils, Forest Ecosystems), Vol. 19, Issue: 3.2,155-162.

Jankevica, L., Telnov, D., Salmane, I, Ziemele, S., Cekstere, G. 2019. Studies on soil microflora and microarthropod communities as soil health and quality indicators in urban forests in Rīga, Latvia. Conference Proceedings of 19th International Multidisciplinary Scientific Geoconference SGEM 2019, 30 June - 6 July. Water Resources. Forest, Marine and Ocean Ecosystems (Soils, Forest Ecosystems), Vol. 19, Issue: 3.2, 821-828.

Alle, V., Kondratovics, U., Vikmane, M., Osvalde, A., 2019. Cadmium and lead accumulation and anatomical changes in roots of Vicia faba under heavy metal contamination. Conference Proceedings of 19th International Multidisciplinary Scientific Geoconference SGEM 2019, 30 June - 6 July. Water Resources. Forest, Marine and Ocean Ecosystems (Soils, Forest Ecosystems), Vol. 19, Issue: 3.2, 71-78.

Bouraoui, D., Cekstere, G., Osvalde, A., Vollenweider, P., Rasmann, S. 2019. Deicing salt pollution affects the foliar traits and arthropods’ biodiversity of lime trees in Riga’s street greeneries. Frontiers in Ecology and Evolution, 7, article no. 282. doi: 10.3389/fevo.2019.00282.

Alle, V., Osvalde, A., Kondratovičs, U., Vikmane, M. 2019. Influence of lead accumulation on physiological parameters and mineral element (Mg, Fe, Mn) uptake in crop plants. Proceedings of the 26th NJF Congress: Agriculture for the Next 100 Years, Kaunas, Lithuania, 27-29 of June, 2018, 16-26.

Osvalde, A., Cekstere, G., Karlsons, A., Pormale, J. 2019. Dynamics of soil nutrient status of highbush blueberry in Latvia, 2006-2017. SWS Journal of Earth and Planetary Sciences, 1, 38-48, DOI 10.35603/ISSUE1.1/ 2019.

2018

Cekstere, G., Osvalde, A., Nollendorfs, N., Karlsons, A., Pormale, J., Zalitis, P., Snepsts, G., Minova, S., Jankevica, L., Laivins, M. 2018. Effects of fertilization on Picea abies stands situated on drained peat soils. Agronomy Research, 16(1), 64-83. doi.org/10.15159/AR.18.020.

Karlsons, A., Osvalde, A., Čekstere, G., Pormale, J. 2018. Research on the mineral composition of cultivated and wild blueberries and cranberries. Agronomy Research, 16(2), 454-464. doi.org/10.15159/AR.18.039.

Osvalde, A., Karlsons, A., Cekstere, G., Pormale, J. 2018. Long term studies on dynamics of soil nutrient status of highbush blueberry in Latvia. Proceedings of the 18th International Multidisciplinary Scientific GeoConference SGEM 2018, 2-8 July, Albena, Bulgaria, Vol. 18, Issue 3.2, 305-312.

Cekstere, G., Osvalde, A., Laivins, M. 2018. Impact of Phalacrocorax carbo colonies on soil and vegetation at lake Kanieris in Latvia. Proceedings of the 18th International Multidisciplinary Scientific GeoConference SGEM 2018, 2-8 July, Albena, Bulgaria, Vol. 18, Issue 3.2, 235-242.

Osvalde, A., Karlsons, A., Cekstere, G., Pormale, J., Apse, J. 2018. Influence of soil type on nutrients status of highbush blueberry leaves in Latvia. Acta Horticulturae, 1217, 399-404. DOI 10.17660/ActaHortic.2018.1217.51

Čekstere, G., Osvalde, A., Nollendorfs, V., Pormale, J., Karlsons, A., Šņepsts, G., Zālītis, P., Dudele, G., Jankevica, L., Minova S. un Laiviņš, M., 2018. Egles stādījumi nesekmīgi apmežotās augsnēs: mēslošanas eksperiments ar kālija magnēziju. Latvijas Veģetācija, 28, 5-34.

Laiviņš, M., Čekstere, G., 2018. Augtenes hipereitrofikācija jūras kraukļu Phalacrocorax carbo koloniju dzīvotnēs Kaņiera ezera Ābeļu un Egļu salās. Latvijas Veģetācija, 28, 103-120

2017

Karlsons, A., Osvalde, A. 2017. Nutrient status of the American cranberry in Latvia (2005–2016). Agronomy Research, 15(1), 196-204.

Kavina, D., Osvalde, A. 2017. Comarative chemical characterisation of soils at Cypripedium calceolus sites in Latvia. Proc. Latvian Acad. Sci., Section B, 71(1/2), 43-51.

Ievins, G., Vikmane, M., Ķirse, A., Karlsons, A. 2017. Effect of vermicompost extract and vermicompost-derived humic acids on seed germination and seedling growth of hemp. Proc. Latvian Acad. Sci., Section B, 71 (4), 286-292. DOI: 10.1515/prolas-2017-0048

Vojevode, L., Osvalde, A., Čekstere, G., Karlsons, A. 2017. Assessment of the impact of vermicompost and peat extracts on nutrient accumulation in tubers and potato yield. Proceedings of the 8th International Scientific Conference “RURAL DEVELOPMENT 2017: Bioeconomy Challenges”, 23-24th November, 2017, Kaunas, Lithuania, 178-181.

Karlsons, A., Druva-Lusite, I., Necajeva, J., Andersone-Ozola, U., Samsone,I., Osvalde, A., Ievinsh, G. 2017. Adaptation strategies of rare plant species to heterogeneous soil conditions on a coast of a lagoon lake as revealed by analysis of mycorrhizal symbiosis and mineral constituent dynamics. Environmental and Experimental Biology, 15, 113-126. DOI: 10.22364/eeb.15.10

2016

ALLE, V., KONDRATOVICS, U., OSVALDE, A. and VIKMANE, M., 2016. Differences in cadmium accumulation and induced changes in root anatomical structures in plants used for food. Agronomy Research, 14(SpecialIssue 2), pp. 1249-1260.

CEKSTERE, G., OSVALDE, A. and LAIVINS, M., 2016. Mineral Nutrition of Young Ash in Latvia. Proceedings of the Latvian Academy of Sciences, Section B, 70(3), pp. 138-149.

OSVALDE, A., KARLSONS, A., CEKSTERE, G. and VOJEVODE, L., 2016. The effect of vermicompost-derived humic substances on nutrient status and yield of organic potato in field conditions. Acta Horticulturae. 1142, pp.227-284.  

CEKSTERE, G., OSVALDE, A. and VOLLENVEIDER, P., 2016. De-icing salt impact on leaves of street trees (Tilia x vulgaris H.) in Riga, Latvia. Acta Biologica Universitatis Daugavpiliensis, 16(1), pp. 33-41.

KLAVIŅA, D. and OSVALDE, A., 2016. Soil conditions of cypripedium calceolus sites in Latvia. Proceedings of the Latvian Academia of Sciences, Section B. 70 (6) PRESS.

KARLSONS, A., OSVALDE., ANDERSONE-OZOLA, U. and IEVINSH, G.  (2016). Vermicompost from Municipal Sewage Sludge Affects Growth and Mineral Nutrition of Winter Rye (Secale cereale) Plants. Journal of Plant Nutrition, 39 (6), pp. 765-780.  DOI: 10.1080/01904167.2015.1087566

MAROZAS, V., CEKSTERE, G., LAIVINS, M. and STRAIGYTE, L., 2016. Comparison of neophyte communities of Robinia pseudoacacia L. and Acer negundo L. in the eastern Baltic Sea region cities of Riga and Kaunas.Urban Forestry and Urban Greening, 14(4), pp. 826-834.

2015

OSVALDE, A., 2015. Ogulāju mēslošanas īpatnības. Barības elementu nodrošinājuma izpētes metodes. Ruža, A., Kondratovičs, U., rec. Augļkopība. LV Augļkopības institūts, 420-425 lpp.

ČEKSTERE, g., LAIVIŅŠ, M. and OSVALDE, A. (2015) Chemical composition of Scots pine bark as a bioindicator of enviromental quality in Riga, Latvia. Proceedings of the Latvian Academy of Sciences. Section B, 69(3), pp. 87–97

GRAUDA, D. and ČEKSTERE, G., 2015. Current investigations of urban enviromental quality in Latvia. Proceedings of the Latvian Academy of Sciences. Section B, 69(3), pl. A1.

ČEKSTERE, G., KARLSONS, A. and GRAUDA, D., 2015. Salinity-induced responses and resistance in Trifolium repens L. Urban Forestry and Urban Greening, 14(2), pp. 225-236.

OSVALDE, A., PORMALE, J., KARLSONS, A. and CEKSTERE, G., 2015. Differences in agrochemical characteristics of highbush blueberry peat and mineral soils in Latvia, 2011-2014, International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM 2015, pp. 101-108.

STRAIGYTE, L., ČEKSTERE, G., LAIVIŅŠ, M. and MAROZAS, V., 2015. The spread, intensity and invasiveness of the acer negundo in riga and kaunas. Dendrobiology, 74, 157-168. doi:10.12657/denbio.074.016

MINOVA, S., JANKEVICA, L., SALMANE, I. and ČEKSTERE, G., 2015. Preliminary studies on microbial biomass and the microarthropod community as soil health and quality indicators in Urban Grasslands, Riga as an example. Proceedings of the Latvian Academy of Sciences, Section B: Natural, Exact, and Applied Sciences, 69(3), pp. 140-144.

STRAIGYTE, L., ČEKSTERE, G., LAIVIŅŠ, M. and MAROZAS, V., 2015. Pest plant score of alien robinia pseudoacacia in Riga (Latvia) and Kaunas (Lithuania). Proceedings of the Latvian Academy of Sciences, Section B: Natural, Exact, and Applied Sciences, 69(3), pp. 112-119.

LAIVIŅŠ, M., Čekstere, G. (2015). Shrub encroachment in non-wooded habitats in Riga. Distribution patterns, ecology and plant communities of Acer negundo. Forestry, in press

Laiviņš, M., Čekstere, G. 2015. Nemeža biotopu pārkrūmošanās Rīgā. Acer negundo izplatība, ekoloģija un augu sabiedrības. Mežzinātne. pieņemts publicēšanai.

2014

Grantina-Ievina, L., Karlsons, A., Andersone-Ozola, U., Ievinsh, G. (2014). Plant growth-affecting activity, cultivable microorganisms, and potential use as a soil amendment of freshwater sapropel. Zemdirbyste-Agriculture, Vol. 101, 355-366.

Osvalde, A., Karlsons, A., Cekstere, G., Vojevode, L. (2014). The effect of Wermikompost-derived humic substances on nutrient status and yield of organic potato in field conditions. Acta Horticulturae. iesniegts.

 Karlsons, A., Osvalde, A., Pormale, J., Nollendorfs, V. (2014). American cranberry cultivation in extracted bogs in Latvia: aspects of mineral nutrition. Proceedings of the 55th international conference of Daugavpils University. Daugavpils Universitāte, Akadēmiskais apgāds “SAULE”, 118-123.

Laiviņš, M., Čekstere, G., Medene, A., Donis, J. (2014). Structure and dynamics of oligomesic dry pine forests in land zones of the Lake Engure catchment’s area. Proceedings of the Latvian Academia of Sciences, Section B, 68, 80-92.

Apse, J., Karklins, A., Osvalde, A. (2014). Nitrogen optimization for blueberry cultivation. 14th SGEM GeoConference on Water Resources. Forest, Marine and Ocean Ecosystems, Conference proceedings, Vol. 2, 199-206.

Laiviņš, M., Čekstere, G., Medene, A., Donis, J. (2014). Structure and dynamics of oligomesic dry pine forests in land zones of the Lake Engure catchment area. Proc. Latvian Acad. Sci, 68 (1/2), 80-92.

2013

Cekstere, G., Osvalde A. (2013) A study of chemical characteristics of soil in relation to street trees status in Riga (Latvia). Urban Forestry & Urban Greening, 12, 69-78.

Cekstere, G., Laivins, M., Osvalde, A. (2013) Destruction of young Fraxinus excelsior L. stands and mineral nutrition status in Latvia, a pilot study. Acta Biologica Universitatis Daugavpiliensis, 1: 31-43.

2012

 Karlsons, A. (2012) Minerālās barošanās adaptīvie mehānismi un minerālelementu nodrošinājuma īpatnības jūras piekrastes augiem. Promocijas darba kopsavilkums. Latvijas Universitāte, Rīga, 92 lpp.

Osvalde, A., Karlsons, A., Čekstere, G., Maļecka, S. (2012) Effect of humic substances on nutrient status and yield of onion (Allium cepa L.) in field conditions. Proc. Latvian Acad. Sci, 66 (4/5), 192-199.

Pormale, J., Osvalde, A., Karlsons, A. (2010) Investigation on the essential mineral element contents of cultivated and wild blueberry fruits in Latvia. Proceedings of the International Conference „Environmentally friendly and safe Technologies for quality of fruit and vegetables”, COST Action 942, January 14-16, Faro, Portugal, 108-112. Saņemts 2012. gadā. 

2011

Andersone U., Druva-Lūsīte I., Ieviņa B., Karlsons A., Ņečajeva J., Samsone I., Ievinsh G.: The use of nondestructive methods to assess a physiological status and conservation perspectives of Eryngium maritimum L., Journal of Coastal Conservation,  15(4), pp. 509–522, 2011.

Osvalde, A., Karlsons, A., Nollendorfs V.: American cranberry cultivation for the after-use of extracted raised bogs in Latvia: agrochemical prerequisites and ecological aspects, Proceedings of the XXXIV CIOSTA CIGR V Conference “Efficient and safe production processes in sustainable agriculture and forestry” (Vienna, Austria, 29 June–1 July, 2011), pp. 1-8.

Osvalde, A. 2011. Optimization of plant mineral nutrition revisited: the roles of plant requirements, nutrient interactions, and soil properties in fertilization management, Environmental and Experimental Biology, 9, pp. 1–8.

Karlsons, A., Osvalde, A., Ievinsh, G. 2011. Growth and mineral nutrition of two triglochin species from saline wetlands: adaptation strategies to conditions of heterogeneous mineral supply, Environmental and Eksperimental Biology, 9, pp. 83–90,

Čekstere, G. 2011. Vides faktoru ietekme uz Holandes liepu (Tilia x vulgaris) vitalitāti Rīgas ielu apstādījumos, Promocijas darbs, LU Akadēmiskais apgāds, Rīga.

Druva-Lusite I., Karlsons A., Andersone U., Ievina B., Necajeva J., Samsone I., Ievinsh G. 2011. Performance of a coastal marsh plant Hydrocotyle vulgaris in natural conditions in relation to mineral nutrition and mycorrhizal symbiosis. Aquatic Botany/ iesniegts publicēšanai.

2010

Cekstere, G., Osvalde, A. 2010. Young street greenery supply with nutrients in Riga, Latvia, 2007. Acta Horticulturae, Vol. 881, 573-576.

Cekstere, G., Osvalde, A., Nikodemus, O. 2010. Influence of de-icing salt on K supply and street trees ecological status in Riga, Latvia. Highway and Urban Environment, Aliance for Global Sustainability Bookseries 17, proceedings of the 9th Highway and urban Environment Symposium (Rauch, s., Morrison, G.M., Monzon, A.,-eds.) Springer, 17, 337-346.

Cekstere, G., Osvalde, A., Nikodemus, O. 2010. Nutrient accumulation in street greenery of Riga (Latvia) in increased salinity conditions, 2005 and 2007. Proceedings of the International soil science congress “Management of Natural Resources to Sustain Soil Health and Quality”, Samsun, Turkey, 26-28 May, 370-377.

Cekstere, G., Osvalde, A., Nikodemus, O. 2010. Nutrient accumulation in street greenery of Riga (Latvia) in increased salinity conditions, 2005 and 2007. Anadolu J. Agric. Sci., 25, S-3, 192-198.

Čekstere, G., Osvalde, A. 2010. Macronutrient status in the different-aged lime trees (Tilia x vulgaris) in Riga streets. Baltic Forestry, Vol. 16, 16-21

Osvalde, A., Karlsons, A. 2010. Evaluation of the American cranberry nutrient status in Latvia during 2001-2007. Acta Horticulturae, Vol. 868, 213-218.

Osvalde, A., Karlsons, A., Pormale, J., Nollendorfs, V. 2010. Renovation of extracted high bogs in Latvia: mineral nutrition and ecological aspects of American cranberry cultivation. Proceedings of the International soil science congress “Management of Natural Resources to Sustain Soil Health and Quality”, Samsun, Turkey, 26-28 May,  503-509

Osvalde, A., Karlsons, A., Pormale, J., Nollendorfs, V. 2010. Renovation of extracted high bogs in Latvia: mineral nutrition and ecological aspects of American cranberry cultivation. Anadolu J. Agric. Sci., 25, S-2, 120-125.

Pormale, A., Osvalde, A., Karlsons, A., 2010. Mikroelementi (Fe, Mn, Zn, Cu, Mo un B) savvaļas ogu (Vaccinium murtilus, Vaccinium oxycoccos, Vaccinium vitis idaea) augšanas vidē. Rēzeknes augstskola, 12. starptautiskā studentu zinātniski praktiskā konference "Cilvēks. Vide. Tehnoloģojas", Rēzekne, Latvija, 22. apr.

2009

Čekstere, G. (2009) Rīgas Centra ielu apstādījumu ekoloģiskais stāvoklis. Latvijas veģetācija, 20, Latvijas Universitātes Bioloģijas institūts, Rīga, 136 lpp.

Čekstere, G., Osvalde, A. (2009) A study of heavy metal accumulation in street greenery of Riga (Latvia) in relation to trees status. Folia Geographica, Vol.XIV, 7-23.

Karlsons, A., Osvalde, A., Nollendorfs, V. (2009) Research on mineral composition of American cranberry and wild cranberry fruits in Latvia. Latvian Journal of Agronomy. Vol. 12, 65 – 71.

Osvalde, A., Pormale, J., Karlsons, A., Nollendorfs, V. (2009) Mineral nutrition status of highbush blueberry, Vaccinium corumbosum L., in Latvia: problems and tendencies. Proceedings of the XXXIII CIOSTA CIGR V conference, Technology and management to ensure sustainable agriculture, agro-systems, forestry and safety, Reggio Calabria, Italy, 17–19th June, Vol.,2, 1347.-1351.

Pormale, J., Osvalde, A., Nollendorfs, V. (2009) Comparative study of cultivated highbush and wild blueberry nutrient status in producing plantings and woodlands of Latvia. Latvian Journal of Agronomy. Vol. 12, 80-87.

2005-2008:

Osvalde, A., Paegle, G. (2005) Plant responses to imbalance of copper in substrate. Proc. Latvian Acad. Sci., Section B., Vol. 59, No. 3/4, 156 – 162.

Osvalde, A., Karlsons, A. (2005) Nutrient status of the American cranberries, Vaccinium macrocarpon Ait., in Latvia. Latvian Journal of Agronomy, No. 8, 321 – 325.

Čekstere, G., Osvalde, A., Karlsons, A., Nollendorfs, V., Paegle, G. (2005) The effect of urban environment on the mineral nutrion status of street trees in Riga, the problems and possible solutions.- Acta Universitatis. Earth and Environment sciences, Vol. 685, 7 – 20.

Osvalde, A., Paegle, G. (2006) Plant biochemical response to imbalance of zinc in substrate. Proc. Latvian Acad. Sci., Section B., Vol. 60, No. 4, 133 – 139.

Osvalde, A., Paegle, G. (2007) Cadmium: accumulation, responses to exposure and possible protection mechanisms in plants. Proc. Latvian Acad. Sci., Section B., Vol. 61, No. 6, 211 – 218.

Cekstere, G., Nikodemus, O., Osvalde, A (2008) Toxic impact of the de-icing material to street greenery in Riga, Latvia. Urban Forestry and Urban Greening, 7, 207-217.

Popular scientific articles 2005-2019:

Karlsons, A. (2019) Barības elementu deficīts un pārbagātība krūmmellenēm.. Profesionālā dārzkopība, Nr 1 (8). 24-28.

Autoru kolektīvs, 100 Latvijas vēstures notikumi: Cilvēki un procesi 1918-2018. 2018., Čekstere, G.  šķirklis “Latvijas Sarkanā grāmata”, 168-169.lpp, Latvijas Mediji.

Osvalde, A. (2012) Amerikas lielogu dzērveņu un krūmmelleņu minerālā barošana. Dārzs un Drava, 3-4, 59-60.

Nollendorfs, V. (2012) Graudaugu minerālās barošanās optimizācija. Saimnieks, Janvāris, 42.

Nollendorfs, V., Čekstere, G. (2012) lapu mēslojums ziemas kviešiem un rapšiem. Saimnieks, Jūnijs, 36-38.

Nollendorfs, V., Čekstere, G. (2012) Barības elementu apgāde rapšiem. Saimnieks, augusts, 46-48.

Nollendorfs, V., Čekstere, G. (2012) Kalcija, magnija un sēra apgādes optimizācija. Saimnieks, Septembris, 54-57.

Nollendorfs, V. (2011). Mikroelementi helātu savienojumu veidā. Dārzs un Drava, Nr. 5-6, 62.-63. lpp.

Nollendorfs, V. (2010). Augsnes ielabošana ar ģipšošanu augu nodrošināšanai ar kalciju un sēru. Saimnieks. Nr. 9, 38.-40. lpp.

Nollendorfs, V., Karlsons, A., Čekstere, G. (2007) Krūmmelleņu mēslošana minerālaugsnēs. Dārzs un drava, Nr. 1., 26.-29. lpp.

Nollendorfs, V. (2005) „Vito – Silva” skābā vidē augošo kultūru mēslošanai. Dārzs un drava, Nr. 3, 30. – 31. lpp.

Nollendorfs, V. (2005) Barības elementu deficīts un pārbagātība krūmmellenēm. Saimnieks, Nr. 7, 18. – 22. lpp.

Nollendorfs, V. (2005) Lielogu dzērvenes un krūmmellenes – visperspektīvākās ogu kultūras Eiropas tirgum. Dārzs un drava, Nr. 7. 27. lpp.

Nollendorfs, V., Osvalde, A., Paegle, G. (2005) Ezeru, upju un dīķu ūdens ķīmiskās īpašības. Saimnieks, Nr. 6, 24. – 27. lpp.

Nollendorfs, V. (2005) Augsnes mēslošanas līdzeklis – ģipsis. Agrotops, Nr. 4, 27. – 28. lpp.

Paraugus agroķīmiskām analīzēm mums iespējams nosūtīt arī caur pakomātiem. Lūgums sūtījumus adresēt uz:

Rīgas Āgenskalna RIMI pakomāts (Mārupes iela 10A),

Anita Osvalde

tel. 26167529

e-pasts: augi@lu.lv

 

Sūtījumā klāt norādiet savu kontaktinformāciju: tel., e-pastu, juridiskām personām lūgums norādīt uzņēmuma nosaukumu, reģ. nr. Norādiet, kādu pakalpojumu vēlaties saņemt (piemēram, pilna augsnes agroķīmiskā analīze vai konkrēti parametri - pH, NPK, utt.).

Pakalpojumu veidus un izcenojumus skatīt šeit.