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Effect of the growth termination method of agro-ecological service crops on the soil arthropod abundance in the two-year soiveg projekt

Abstract

Rastline za agroekološke storitve (ASC) so pomemben sestavni del mnogih kmetijskih pridelovalnih sistemov. ASC rastline lahko zagotovijo bolj trajnostni ekosistem, saj zmanjšajo erozijo tal, povečajo količino organske snovi, izboljšajo rodovitnost tal ter preprečijo izgubo hranil iz tal. ASC prispevajo uravnavanju pojava plevela in boljšim pogojem za koristne organizme. V okviru projekta SoilVeg je bila v letih 2015–2018 preverjena učinkovitost uporabe valjarja rastlinske odeje Roller Crimper (RC) kot alternativne metode prekinitve rasti prekrivnih rastlin brez obdelave v primerjavi s plitvo zadelavo in običajno kmetijsko prakso v ekološki pridelavi zelja. Poljski poskus s »split-split-plot« zasnovo je bil izveden v Mariboru. Preizkušeni sta bili dve ASC rastlini (inkarnatka in ječmen), katerih rast je bila prekinjena (i) z uporabo tehnike zmanjšanja obdelave tal oziroma valjanje z RC in (ii) inkorporacijo ASC v tla kot zeleno gnojenje v primerjavi z običajno kmetijsko prakso brez ASC z oranjem in (iii) okopavanjem ter (iv) zastiranje tal s črno folijo. V obeh letih poskusa je bila populacija členonožcev izražena kot vrednost activity density (AD) višja na obravnavanjih, kjer je bila posejana inkarnatka. . Najpogosteje ujeti v vabah so bili hrošči (Coleoptera), muhe (Diptera), pajkovci (Araneae) in stenice (Heteroptera). V vabah so bili najpogosteje ujeti hrošči (Coleoptera), muhe (Diptera), pajkovci (Araneae) in stenice (Heteroptera). Povprečna vrednost AD krešičev je bila višja na obravnavanjih z zelenim gnojenjem v primerjavi z RC. Tudi sicer je RC pozitivno vplival na pojavnost več različnih redov žuželk. V prihodnosti bo potrebno preveriti več vrst ASC rastlin in izbrati najoptimalnejši način tehnike prekinitve rasti.Agro-ecological Service Crops (ASC) have been recognized as a beneficial component of many farming systems and especially in organic agriculture. ASC can provide a more sustainable ecosystemthey reduce soil erosion, increase the amount of organic matter, improve soil fertility and nutrient cycling. ASC contribute to weed control management and better environment for beneficial insects. This research was conducted as part of the SoilVeg project under CORE Organic Plus programme, to determine the effectiveness of using Roller Crimper technology (RC) as an alternative method for termination of cover crops in organic cabbage production. It was conducted in Maribor, using a split-split plot experimental design from 2015 to 2018. A system based on the use of two different ASCs (crimson clover and barley) that were carried out via two different techniques i) no/reduced tillage, as flattering of ASC with RC and ii) the traditional technique used to incorporate the ASC as green manure (GM) into the soil. These research treatments were compared to usual farming practice without ASC with ploughing and (iii) mechanical weed control with hoeing and (iv) use of synthetic mulch. The activity density of total trapped insects was higher in treatments where crimson clover was sown in both years. The most trapped insects were beetles (Coleoptera), flies (Diptera), spiders (Araneae) and stenas (Heteroptera). AD ground beetle numbers were on average higher in treatments with green manure. RC also had a positive effect on several different insects. In the future it would be advisable to check several types of ASC plants and choose the most optimal way of termination

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