EARTHWORM POPULATIONS AFTER FIELD CROPS HARVESTING IN THE VARIOUS PRODUCTION SYSTEMS

Na poskusnem polju Fakultete za kmetijstvo in biosistemske vede smo v okviru trajnostnega poskusa s štirimi pridelovalnimi sistemi (biodinamicni, ekološki, integrirani, konvencionalni) in kontrolnim obravnavanjem oktobra 2010 izvedli raziskavo, v kateri smo vrednotili število in maso deževnikov po spravilu pšenice, pire in oljnih buc. Poljšcina je imela statisticno znacilen vpliv na male in velike deževnike, skupno število in maso deževnikov, pridelovalni sistem pa je statisticno znacilno vplival le na male deževnike. Najvec deževnikov je bilo na oljnih bucah (15,3), med piro (8,4) in pšenico (8,0 na 0,25 m2) pa ni bilo statisticno znacilne razlike. Pri biodinamicnem pridelovalnem sistemu je bila masa deževnikov 11,7 g, pri konvencionalnem pa 6,3 na 0,25 m2. Skupno število deževnikov je bilo pri ekološki pridelavi 13,8, pri biodinamicni 10,9 in pri konvencionalni pridelavi 8,4 deževnikov na 0,25 m2. Tako lahko zakljucimo, da so zaznani trendi vecje mase in števila deževnikov na manj intenzivnih pridelovalnih sistemih (biodinamicni, ekološki).Within a sustainable experiment with four production systems (biodynamic, organic, integrated and conventional) and control treatment in October 2010 we carried out a research on a testing field of the Faculty of Agriculture and Life Sciences, where we evaluated the number and mass of earthworms after the harvest of wheat, spelt and oil pumpkins. The field crop had a statistically typical impact on small and large earthworms, their total number and mass and the production system had a statistically typical impact only on small earthworms. The most earthworms were on oil pumpkins (15.3), but there were no statistically typical differences between spelt (8.4) and wheat (8.0 per 0.25 m2). In the biodynamic production system the mass of earthworms was 11.7 g and in the conventional 6.3 g/0,25 m2. The total number of earthworms in organic production was 13.8, in biodynamic 10.9 and in conventional 8.4 earthworms per 0.25 m2. This way we can conclude, that we observed trends of a higher mass and number of earthworms in less intensive production systems (biodynamic, organic)