Jan Kofod Schjørring

Jan Kofod Schjørring

Professor, emeritus


  1. Published

    The plant nutriome: High-throughput profiling of inorganic elements in plants

    Husted, Søren & Schjoerring, Jan K., 2005, Plant Biotech Denmark. The Royal Veterinary and Agricultural University, Department of Plant Biology, p. 10 1 p.

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearch

  2. Published

    Residual nitrogen effect of clover-ryegrass sward on a subsequent cereal crop as studied by 15N methodology and mathematical modelling

    Høgh-Jensen, H. & Schjoerring, Jan K., 1996, Ikke angivet. Raupp, J. (ed.). Institute for Biodynamic Research, 12 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  3. Published

    The ¤effect of P- or K-deficiencies on the structure and quality of grass-clover communities

    Høgh-Jensen, H., Rubæk, G. H. & Schjoerring, Jan K., 2000, Grassland science in Europe. Søegaard, K. . . A. . (ed.). 5 ed. Center for Skov, Landskab og Planlægning/Københavns Universitet, p. 406-408 3 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  4. Published

    Shoot nutrient indices as indicators of nitrogen, phosphorus and potassium deficiencies in grassland

    Høgh-Jensen, H. & Schjoerring, Jan K., 2000, Ikke angivet. Lithuanian Institute of Agriculture, p. 124-131 8 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  5. Published

    Kinetics of NH4+ and NO3-absorption and H+ fluxes in ryegrass and N2-fixing white clover

    Høgh-Jensen, H., Wollenweber, B. & Schjoerring, Jan K., 1998, Current plant science and biotechnology in agriculture. Elmerich, C., Kondorosi, A. & Newton, W. E. (eds.). 31 ed. Kluwer Academic Publishers, p. 162 1 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  6. Published

    Competition for inorganic N in mixtures of white clover and ryegrass

    Høgh-Jensen, H. & Schjoerring, Jan K., 1996.

    Research output: Contribution to conferencePaperResearch

  7. Published

    Regulation of apoplastic NH4+ concentration in leaves of oilseed rape

    Høier Nielsen, K. & Schjoerring, Jan K., 1998, In: Plant Physiology. 118, p. 1361-1368 8 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  8. Published

    Ammonia exchange at the tree-atmosphere interface

    Høier Nielsen, K., Schjoerring, Jan K., Erisman, J. W. & Pearson, J., 2002, Trace gas exchange in forest ecosystems. Gasche, R., Papen, H. & Rennenberg, H. (eds.). Dordrecht: Kluwer Academic Publishers, p. 159-173 15 p. (Tree Physiology).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  9. Published

    Aquaporin homologues in plants and mammals transport ammonia

    Jahn, T. P., Møller, A. L. B., Zeuthen, Thomas, Holm, Lars Morten, Klærke, Dan Arne, Mohsin, B., Kühlbrandt, W. & Schjoerring, Jan K., 2004, In: FEBS Letters. 574, 1-3, p. 31-36 6 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  10. Published

    Ammonium homeostasis and nitrogen use efficiency controlled by transport and assimilation

    Jahn, T. P., Møller, A. L. B., Hoopen, F. T., Bienert, G. P., Hegelund, J. N., Holm, L. M., Zeuthen, T., Klærke, Dan Arne, Mohsin, B., Kühlbrandt, W. & Schjoerring, Jan K., 2005, Plant nutrition for food security, human health and environmental protection. Li, C. P. & al., E. (eds.). Tsinghua University Press, p. 204-205 2 p.

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearch

  11. Published

    Molecular physiology of ammonium transport and assimilation and the role of aquaammoniaporins

    Jahn, T. P., Møller, A. L. B., Hegelund, J. N., Hoopen, F. T., Bienert, G. P., Dionisi, G., Nielsen, K. H. & Schjoerring, Jan K., 2005. 1 p.

    Research output: Contribution to conferencePosterResearch

  12. Published

    Leaf photosynthesis and drought adaptation in field-grown oilseed rape (Brassica napus L.)

    Jensen, C. R., Mogensen, V. O., Mortensen, G., Andersen, M. N., Schjoerring, Jan K., Thage, J. H. & Koribidis, J., 1996, In: Functional Plant Biology. 23, p. 631-644 14 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  13. Published

    Biologisk kvælstoffiksering og recirkulering

    Jensen, E. S., Jørgensen, F., Vinther, F. P., Høgh-Jensen, H. & Schjoerring, Jan K., 1997, Økologisk planteproduktion. Kristensen, E. S. (ed.). Tjele: Danmarks Jordbrugsforskning, Forskningscenter Foulum, Vol. 1997. p. 101-106 6 p. (SP rapport / Statens Planteavlsforsøg).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterCommunication

  14. Published

    Management of biological nitrogen fixation in grass/clover leys

    Jensen, E. S., Jensen, H. H., Vanman Jørgensen, F., Schjoerring, Jan K. & Vinther, E. P., 1996. 8 p.

    Research output: Contribution to conferencePaperResearch

  15. Published

    Residual nitrogen effect of clover-ryegrass swards on yield and N uptake of a subsequent winter wheat crop as studied by use of 15N methodology and mathematical modelling

    Jensen, H. H. & Schjoerring, Jan K., 1997, In: European Journal of Agronomy. 6, p. 235-243 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  16. Published

    Below-ground nitrogen transfer between different grassland species: direct quantification by 15N leaf feeding compared with indirect dilution of soil 15N

    Jensen, H. H. & Schjoerring, Jan K., 2000, In: Plant and Soil. 227, p. 171-183 13 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  17. Published

    Kinetics of nitrate and ammonium absorption and accompanying H+ fluxes in roots of Lolium perenne L. and N2-fixing Trifolium repens L.

    Jensen, H. H., Wollenweber, B. & Schjoerring, Jan K., 1997, In: Plant, Cell and Environment. 20, p. 1184-1192 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  18. Published

    Interactions between nitrogen, phosphorus and potassium determine growth and N2-fixation in white clover and ryegrass leys

    Jensen, H. H. & Schjoerring, Jan K., 2010, In: Nutrient Cycling in Agroecosystems. 87, 3, p. 327-338 12 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  19. Published

    Biological nitrogen fixation in grass-clover leys and its transfer to subsequent crops

    Jensen, H. H. & Schjoerring, Jan K., 1998, APMinderhoudhoeve-reeks. Keulen, H. V., Lantinga, E. A. & Laar, H. H. V. (eds.). 2 ed. Landbouwuniversiteit Wageningen, p. 185-190 6 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  20. Published

    The influence of phosphorus deficiency on growth and nitrogen fixation of white clover plants

    Jensen, H. H., Schjoerring, Jan K. & Soussana, J., 2002, In: Annals of Botany. 90, 6, p. 745-753 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  21. Published

    Regrowth and nutrient composition of different plant organs in grass-clover canopies as affected by phosphorus and potassium availability

    Jensen, H. H., Fabricius, V. & Schjoerring, Jan K., 2001, In: Annals of Botany. 88, p. 153-162 10 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  22. Published

    Rhizodeposition of nitrogen by red clover, white clover and ryegrass leys

    Jensen, H. H. & Schjoerring, Jan K., 2001, In: Soil Biology & Biochemistry. 33, p. 439-448 10 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  23. Published

    Interactions between white clover and ryegrass under contrasting nitrogen availability: N2 fixation, N fertilizer recovery, N transfer and water use efficiency

    Jensen, H. H. & Schjoerring, Jan K., 1997, In: Plant and Soil. 197, p. 187-199 13 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  24. Published

    Benefits of nitrogen for food, fibre and industrial production

    Jensen, Lars Stoumann, Schjoerring, Jan K., Hoek, K. W. V. D., Poulsen, H. D., Zevenbergen, J. F., Pallière, C., Lammel, J., Brentrup, F., Jongbloed, A. W., Willems, J. & Grinsven, H. V., 2011, The european nitrogen assessment: sources, effects and policy perspectives. Sutton, M. A., Howard, C. M., Erisman, J. W., Billen, G., Bleeker, A., Grennfelt, P., Grinsven, H. V. & Grizzetti, B. (eds.). Cambridge University Press, p. 32-61 30 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

  25. Published

    Wheat as a dual crop for biorefining: Straw quality parameters and their interactions with nitrogen supply in modern elite cultivars

    Jørgensen, H., van Hecke, J., Zhang, H., Malik, P. L., Felby, C. & Schjoerring, Jan K., 1 Feb 2019, In: GCB Bioenergy. 11, 2, p. 400-415 16 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  26. Published

    Nitrogen affects the quality of biomass for biorefining

    Jørgensen, H., van Hecke, J. J. J., Baldwin, L. A. & Schjoerring, Jan K., 2017, Proceedings Book: XVIII International Plant Nutrition Colloquium with Boron and Manganese Satellite Meetings. Carstensen, A., Laursen, K. H. & Schjoerring, J. K. (eds.). University of Copenhagen, p. 351-352 2 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

  27. Published

    The potential for biorefining of triticale to protein and sugar depends on nitrogen supply and harvest time

    Jørgensen, H., Thomsen, Sune Tjalfe & Schjoerring, Jan K., 2020, In: Industrial Crops and Products. 112333.

    Research output: Contribution to journalJournal articleResearchpeer-review

  28. Published

    Glutamine synthetase isoforms in wheat and barley: targets for improving nitrogen use efficiency

    Kichey, T., Jahn, T. P., Hirel, B., Habash, D. Z. & Schjoerring, Jan K., 2008, In: Physiologia Plantarium. 3, p. 189 1 p.

    Research output: Contribution to journalConference abstract in journalResearch

  29. Published

    Glutamine synthetase isoforms in wheat and barley: targets for improving nitrogen use effeciency

    Kichey, T. M. R., Jahn, T. P., Hirel, B., Habash, D. Z. & Schjoerring, Jan K., 2009. 1 p.

    Research output: Contribution to conferenceConference abstract for conferenceResearch

  30. Published

    Improving nitrogen use efficiency in barley (Hordeum vulgare L.) through the cisgenic approach

    Kichey, T. M. R., Holme, I., Møller, I. S., Jahn, T. P., Holm, P. B. & Schjoerring, Jan K., 2009, The proceedings of the International Plant Nutrition Colloquium XVI, UC Davis. eScholarship, University of California, 4 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  31. Published

    Improving nitrogen use efficiency in barley through the cisgenic approach

    Kichey, T. M. R., Holme, I., Møller, I. S., Jahn, T. P., Holm, P. B. & Schjoerring, Jan K., 2009.

    Research output: Contribution to conferencePosterResearch

  32. Published

    Nanomaterials as fertilizers for improving plant mineral nutrition and environmental outcomes

    Kopittke, P. M., Lombi, E., Wang, P., Schjoerring, Jan K. & Husted, Søren, 2019, In: Environmental Science: Nano. 6, 12, p. 3513-3524

    Research output: Contribution to journalReviewResearchpeer-review

  33. Published

    Dynamic interactions between root NH4+ influx and long-distance N translocation in rice: insights into feedback processes

    Kronzucker, H. J., Schjoerring, Jan K., Erner, Y., Kirk, G. J. D., Siddiqi, M. Y. & Glass, A. D. M., 1998, In: Plant and Cell Physiology. 39, 12, p. 1287-1293 7 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  34. Published

    Suppression of C-hordein synthesis in barley by antisense constructs results in a more balanced amino acid composition

    Lange, M., Vincze, E., Wieser, H., Schjoerring, Jan K. & Holm, P. B., 2007, In: Journal of Agricultural and Food Chemistry. 55, 15, p. 6074-6081 8 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  35. Published

    Responses of barley root and shoot proteomes to long-term nitrogen deficiency, short-term nitrogen starvation and ammonium

    Laurell Blom Møller, A., Pedas, P., Andersen, B., Svensson, B., Schjoerring, Jan K. & Finnie, C., 2011, In: Plant, Cell and Environment. 34, 12, p. 2024-2037 14 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  36. Published
  37. Published

    Recent developments in plant tissue analysis

    Laursen, Kristian Holst, Hansen, Thomas Hesselhøj, Persson, Daniel Pergament, Schjoerring, Jan K. & Husted, Søren, 2009, The proceedings of the International Plant Nutrition Colloquium. Department of Plant Sciences, University of California, Davis, 5 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

  38. Published

    Authentication of organically grown plants - advantages and limitations of atomic spectroscopy for multi-element and stable isotope analysis

    Laursen, Kristian Holst, Schjoerring, Jan K., Kelly, S. D. & Husted, Søren, 2014, In: Trends in Analytical Chemistry. 59, p. 73-82 10 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  39. Published

    Is it really organic? – Multi-isotopic analysis as a tool to discriminate between organic and conventional plants

    Laursen, Kristian Holst, Mihailova, A., Kelly, S. D., Epov, V. N., Berail, S., Schjoerring, Jan K., Donard, O. F. X., Larsen, E. H., Pedentchouk, N., Marca-Bell, A. D., Halekoh, U., Olesen, J. E. & Husted, Søren, 2013, In: Food Chemistry. 141, 3, p. 2812-2820 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  40. Published

    På sporet af "Det økologiske fingeraftryk"

    Laursen, Kristian Holst, Schjoerring, Jan K. & Husted, Søren, 2010, Plantekongres 2010: sammendrag af indlæg: 12-14 januar i Herning Kongrescenter. Dansk Landbrugsrådgivning, p. 394-395 2 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

  41. Published

    Multi-elemental fingerprinting of plant tissue by semi-quantitative ICP-MS and chemometrics

    Laursen, Kristian Holst, Hansen, Thomas Hesselhøj, Persson, Daniel Pergament, Schjoerring, Jan K. & Husted, Søren, 2009, In: Journal of Analytical Atomic Spectrometry. 24, 9, p. 1198-1207 10 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  42. Published
  43. Published

    Multielemental fingerprinting as a tool for authentication of organic wheat, barley, faba bean, and potato

    Laursen, Kristian Holst, Schjoerring, Jan K., Olesen, J. E., Askegaard, M., Halekoh, U. & Husted, Søren, 2011, In: Journal of Agricultural and Food Chemistry. 59, 9, p. 4385–4396 12 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  44. Published

    Biorefining of wheat straw: accounting for the distribution of mineral elements in pretreated biomass by an extended pretreatment–severity equation

    Le, D. M., Sørensen, H. R., Knudsen, N. O., Schjoerring, Jan K. & Meyer, A. S., 2014, In: Biotechnology for Biofuels. 7, 13 p., 141.

    Research output: Contribution to journalJournal articleResearchpeer-review

  45. Published

    Iron fortification of rice seeds through activation of the nicotianamine synthase gene

    Lee, S., Jeon, U. S., Lee, S. J., Kim, Y., Persson, Daniel Pergament, Husted, Søren, Schjoerring, Jan K., Kakei, Y., Masuda, H., Nishizawa, N. K. & An, G., 2009, In: Proceedings of the National Academy of Science of the United States of America. 106, 51, p. 22014-22019 6 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  46. Published

    Bio-available zinc in rice seeds is increased by activation tagging of nicotianamine synthase

    Lee, S., Persson, Daniel Pergament, Hansen, Thomas Hesselhøj, Husted, Søren, Schjoerring, Jan K., Kim, Y., Jeon, U. S., Kim, Y., Kakei, Y., Masuda, H., Nishizawa, N. K. & An, G., 2011, In: Plant Biotechnology Journal. 9, 8, p. 865-873 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  47. Published

    Activation of rice nicotianamine synthase 2 (OsNAS2) enhances iron availability for biofortification

    Lee, S., Kim, Y., Jeon, U. S., Kim, Y., Schjoerring, Jan K. & An, G., 2012, In: Molecules and Cells. 33, 3, p. 269-275 7 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  48. Published

    Linking the key physiological functions of essential micronutrients to their deficiency symptoms in plants

    Lilay, Grmay Hailu, Thiébaut, Noémie, du Mee, D., Assuncao, Ana, Schjoerring, Jan K., Husted, Søren & Persson, Daniel Pergament, 2024, In: New Phytologist. 242, 3, p. 881-902

    Research output: Contribution to journalReviewResearchpeer-review

  49. Published

    Zinc deficiency sensing and regulation in plants

    Lilay, Grmay Hailu, Castro, P. H. A. R. F., Almeida, D., Gusmão, J., Saibo, N., Azavedo, H., Aarts, M., Schjoerring, Jan K. & Assuncao, Ana, 2017, Proceedings Book: XVIII International Plant Nutrition Colloquium with Boron and Manganese Satellite Meetings. Carstensen, A., Laursen, K. H. & Schjoerring, J. K. (eds.). University of Copenhagen, p. 536-537 2 p.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

  50. Published

    Megapixel imaging of (micro)nutrients in mature barley grains

    Lombi, E., Smith, E., Hansen, Thomas Hesselhøj, Paterson, D., Jonge, M. D. D., Howard, D. L., Persson, Daniel Pergament, Husted, Søren, Ryan, C. & Schjoerring, Jan K., 2011, In: Journal of Experimental Botany. 62, 1, p. 273-282 10 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

ID: 4226215