Background and interest

Background in crop physiology (effects of air pollution on crops). Interest in the spatial and temporal variation in crop growth conditions. Current research focus on mapping of agricultural soils and is based on the use of proximal sensors, multivariate techniques and geographic information systems (GIS).

Projects

Currently involved in the following projects:

• In field farm soil mapping of top and sub soil
• Variation in soil conditions within field experiments - quantification and management of variability?
• Identifying critical areas and transport pathways for phosphorus

Publications

Peer-reviewed articles in international journals

Craigon J., Fangmeier A., Jones M., Donnelly A., Bindi M., De Temmerman L., Persson K., Ojanperä K., 2002. Growth and marketable-yield responses of potato to increasing CO2 and ozone. European Journal of Agronomy 17: 273-289. doi:10.1016/S1161-0301(02)00066-7.

Fangmeier A., De Temmerman L., Black C., Persson K., Vorne V. 2002. Effects of elevated CO2 and/or ozone on nutrient content and uptake of potatoes. European Journal of Agronomy 17: 353-368. doi:10.1016/S1161-0301(02)00071-0.

Karlsson P.E., Pleijel H., Danielsson H., Pihl Karlsson G., Piikki K, Uddling J. 2009. Evidences for impacts of near-ambient ozone concentrations on vegetation in southern Sweden. Ambio 38: 425-431. doi:10.1579/0044-7447-38.8.425.

Persson K., Danielsson H., Selldén G., Pleijel H. 2003. The effects of tropospheric O3 and elevated CO2 on potato Solanum tuberosum L. cv. Bintje growth and yield. The Science of the Total Environment 310: 191-201. doi:10.1016/S0048-9697(02)00639-3.  

Piikki K., De Temmerman L., Högy P., Pleijel H. 2008. The open-top chamber impact on vapour pressure deficit and its consequences for stomatal ozone uptake. Atmospheric Environment 42: 6513-6522. doi:10.1016/j.atmosenv.2008.04.014. 

Piikki K., De Temmerman L., Ojanperä K., Danielsson H., Pleijel H. 2008.The grain quality of spring wheat (Triticum aestivum L). in relation to elevated ozone uptake and carbon dioxide exposure. European Journal of Agronomy 28: 245-254. doi:10.1016/j.eja.2007.07.004. 

Piikki K., Klingberg J., Pihl Karlsson P.E. Pleijel H. 2009. Estimates of AOT ozone indices from time-integrated ozone data and hourly air temperature measurements in southwest Sweden. Environmental Pollution 157: 3051-3058. doi:10.1016/j.envpol.2009.05.038.

Piikki K., Selldén G., Pleijel H. 2004. The impact of tropospheric O3 on leaf number duration and tuber yield of the potato Solanum tuberosum L. cultivars Bintje and Kardal. Agriculture, Ecosystems and Environment 104: 483-492. doi:10.1016/j.agee.2004.01.019.

Piikki K., Vorne V., Ojanperä K., Pleijel H. 2003. Potato tuber sugars, starch and organic acids in relation to O3 exposure. Potato Research 46: 67-79. doi:10.1007/BF02736104.

Piikki K., Vorne V., Ojanperä K., Pleijel H. 2007. Impact of elevated O3 and CO2 exposure on potato Solanum tuberosum L. cv. Bintje tuber macronutrients N, P, K, Ca, Mg. Agriculture, Ecosystems & Environment 118: 55-64. doi:10.1016/j.agee.2006.04.012.|

Uddling J., Gelang-Alfredsson J., Piikki K., Pleijel H. 2007. Evaluating the relationship between leaf chlorophyll concentration and SPAD-502 chlorophyll meter readings. Photosynthesis Research 91: 37-46. doi:10.1007/s11120-006-9077-5.

Vorne V., Ojanperä K., De Temmerman L., Bindi M., Högy P., Jones M., Lawson T., Persson K. 2002. Effects of elevated carbon dioxide and ozone on potato tuber quality in the European multiple-site experiment CHIP-project. European Journal of Agronomy 17: 369-381. doi:10.1016/S1161-0301(02)00072-2. 

Proceedings and other reports in English

Pleijel H., Persson K., Danielsson H., Pihl Karlsson G., Skärby L., Selldén, G. 1998. Annual report. Changing Climate and Potential Impacts on Potato Yield and Quality: CHIP. In CHIP Progress Report January-December 1998.

Pleijel H., Danielsson H., Persson K., Pihl Karlsson G., Skärby L., Selldén, G. 2000. Changing Climate and Potential Impacts on Potato Yield and Quality: CHIP. In CHIP Final Report July 2000.

Pleijel H., Piikki K., De Temmerman L., Ojanperä K., Danielsson H 2007. The grain quality of spring wheat Triticum aestivum L. in relation to elevated ozone uptake and carbon dioxide exposure. In: Harmens H., Mills G., Cooper J eds. 20th Task Force Meeting of the ICP Vegetation Program. T22 Abstracts Dubna. 75p. ISBN: 5-9530-0140-1.

Pleijel H., Karlsson P.E., Uddling J., Klingberg J., Piikki K., Pihl Karlsson G. Danielsson H. Global change and plant ozone uptake: Impact of elevated CO2 and meteorology. Extended Abstract, NMR-workshop, Copenhagen, August 2008.

Karlsson P.E, Pleijel H., Pihl Karlsson G., Klingberg J., Piikki K., Tang L. Chen D. Future human and vegetation exposure for ozone - European emissions, hemispheric background, climate change and local geography. Extended Abstract, NMR-workshop, Copenhagen, August 2008.

Piikki K., Söderström M., Stenberg B. 2010. Sensor data fusion for topsoil clay mapping of an agricultural field. NJF seminar, Skara, October 2010. See paper on NJF homepage.

Piikki K., Söderström M., Stenberg B. Sensor data fusion for topsoil clay mapping of an agricultural field. 2011. Extended Abstract, The Second Global Workshop on Proximal Soil Sensing, Montreal 15-18 May, 2011. See paper on workshop homepage.

Reports in Swedish

Piikki K., Karlsson P. E., Klingberg J., Pihl Karlsson G., Pleijel H. 2008. Mätningar av marknära ozon och meteorologi vid kustnära och urbana miljöer i Halland, Skåne och Västra Götalands län. Utveckling av miljömålsuppföljning för ozon med hjälp av diffusionsprovtagare och mobilt mätsystem. Report commisioned bythe County Administrative Boards in Skåne, Halland and Västra Götaland. See report on the County Administrative Board homepage.

Piikki K., Karlsson P. E., Pihl Karlsson G., Klingberg J., Pleijel H. 2008. Förslag till: Mätprogram för marknära ozon i bakgrundsmiljön i södra Sverige med hänsyn till ozonets variation i landskapet. Report commisioned bythe County Administrative Boards in Västra Götalands, Halland, Kalmar, Skåne, Blekinge, Kronoberg, Gotland, Jönköping, Västmanland and Östergötland. See report on the County Admnistrative Board homepage. 

Doctoral thesis

Piikki K. 2005. Atmospheric change and potato. The impact of tropospheric ozone and elevated carbon dioxide on tuber yield and quality. Doctoral thesis. Faculty of science, Göteborg University. ISBN: 91-88896-56-0. See abstract on GU homepage.