Calculation of climate factors as an additional criteria to determine agriculturally less favoured areas

Tjaša POGAČAR, Ajda VALHER, Mateja ZALAR, Zalika ČREPINŠEK, Lučka KAJFEŽ-BOGATAJ

Abstract


Climate factors that are proposed to determine agriculturally less favoured areas (LFA) in Slovenia were analyzed for the period 1981–2010. Following the instructions of European Commission prepared by Joint Research Centre (JRC) 30-years averages of low air temperatures criteria (the vegetation period duration and sums of effective air temperatures) and aridity criteria (aridity index AI) have to be calculated. Calculations were additionally done using Slovenian Environment Agency (ARSO) method, which is slightly different when determining temperature thresholds. Only hilly areas are below the LFA low air temperatures threshold with the lowest located meteorological station in Rateče. According to aridity criteria no area in Slovenia is below the threshold, so meteorological water balance was also examined. Average water balance in the period 1981–2010 was in most of locations lower than in the period 1971–2000. Climate change impacts are already expressed as trend presence in time series of studied variables, so it is recommended to calculate trends and take them into account or to perform regular iterations of calculations.

Keywords


agriculturally less favoured areas (LFA), vegetation period, sum of effective air temperatures, aridity index AI, meteorological water balance

References


Allen R.G., Pereira L.S., Smith M. 1998. Crop evapotranspiration: Guidelines for computing crop requirements. Italija, FAO, Irrigation and Drainage Paper No.56.

ARSO. 2014. Izpis podatkov in definicij iz arhiva meteoroloških podatkov.

Chmielewski F.M., Rötzer T. 2001. Response of tree phenology to climate change across Europe. Agricultural and Forest Meteorology, 108: 101-112

Eliasson R.J.A., Jones F., Nachtergaele D.G., Rossiter J.M. in sod. 2010. Common criteria for the redefinition of Intermediate Less Favoured Areas in the European Union. Environmental Science and Policy, 13: 766-777

Kajfež-Bogataj L., Pogačar T., Ceglar A., Črepinšek Z. 2010. Spremembe agroklimatskih spremenljivk v Sloveniji v zadnjih desetletjih. Acta agriculturae Slovenica, 95, 1: 97-109

Pogačar T., Kajfež-Bogataj L. 2008. Možni vplivi podnebnih sprememb na vodno bilanco tal v Sloveniji. Acta agriculturae Slovenica, 91, 2: 427-441

Pogačar T., Tajnik T., Kajfež-Bogataj L. 2014. Priprava Podlage za slovenski nacionalni akcijski načrt obvladovanja suše. Ujma, 28: 223-228

Povprečna letna višina korigiranih padavin. 2014. ARSO: http://meteo.arso.gov.si/uploads/probase/www/climate/image/sl/by_variable/precipitation/mean-annual-corrected-precipitation_71-00.png (12. 12. 2014)

Program razvoja podeželja RS za obdobje 2007–2013, Priloga 3. 2009. Ljubljana, MKGP. http://www.arhiv.mkgp.gov.si/fileadmin/mkgp.gov.si/pageuploads/PRP/dec09/Priloga_3.pdf (13. 3. 2014)

Ruosteenoja K., Räisänen J., Pirinen P. 2010. Projected changes in thermal seasons and the growing season in Finland. International Journal of Climatology, 31: 1473-1487

Sušnik A. 2014. Zasnove kazalcev spremljanja suše na kmetijskih površinah. Doktorska disertacija. Univerza v Ljubljani, Biotehniška fakulteta, Oddelek za agronomijo: 256 str.

Sušnik A., Žust A. 2008. Definicije agrometeoroloških indikatorjev pri določanju območij z omejenimi možnostmi pridelovanja (OMD). Novi izzivi v poljedelstvu 2008, 338-344

Updated common biophysical criteria to define natural constraints for agriculture in Europe. Definition and scientific justification for the common biophysical criteria. 2012. Van Orshoven J., Terres J.M., Toth T. (ur.). Italy, JRC Scientific and Technical Reports, 66 str.

Zupanc V., Nolz R., Cepuder P., Bračič-Železnik B., Pintar M. 2012. Determination of water balance components with high precision weighing lysimeter in Kleče. Acta Agriculturae Slovenica, 99, 2: 165-173




DOI: http://dx.doi.org/10.14720/aas.2016.107.1.21

Refbacks

  • There are currently no refbacks.


Copyright (c) 2016 Tjaša Pogačar, Ajda Valher, Mateja Zalar, Zalika Črepinšek, Lučka Kajfež-Bogataj

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

 

Acta agriculturae Slovenica is an Open Access journal published under the terms of the Creative Commons CC BY-NC-ND 4.0 License.

                            


ISSN 1581-9175     eISSN 1854-1941