Greenresilient at the Food Festival in Aarhus

On 6-8 September 2019, the Greenresilient project was showcased at the annual Food Festival in Aarhus, Denmark

Beskyttet produktion af økologiske æbler og pærer - PROTECFRUIT

Projektets formål var at bidrage til øget udbytte og areal i den økologiske frugtavl, reducere spild og minimere pesticidbelastning samt øge tilgængelighed af økologiske æbler og pærer. Udbyttet i økologisk æble- og pæreproduktion er mindre end 33% af udbyttet i en konventionel produktion pga. mindre frugter, svampesygdomme og skadedyr på trods af, at "naturlige" pesticider anvendes hyppigt. Med henblik på at reducere sprøjtning og øge udbytte har regntag over trærækken vist gode resultater. Dækning ændrer mikroklimaet og kan påvirke planternes vækst og frugtkvalitet, som derfor skulle undersøges i projektet. En lovende teknik er sprinklerdyser placeret i forskellige højder i trærækken. Herved kan man effektivt sprøjte i den begrænsede periode, hvor kaliumbikarbonat har en virkning og opnå god effekt med færre sprøjtninger end med svovl. Sprinklere kan desuden anvendes til strategisk vanding af ascospore til forebyggelse af æbleskurv. Skadedyrene æblebladlus og pæregalmyg reducerer udbyttet betydeligt. Etablering af blomsterstriber som habitat for naturlige fjender af æblebladlus og bekæmpelse af pæregalmyglarver med insektpatogene svampe blev undersøgt. Virkningen af postharvest behandling med varmt vand og monokromt lys på dannelsen af voks og sekundære metabolitter blev undersøgt for at mindske spild pga. rådsvampe under lagring. Resultaterne blev formidlet til erhvervet gennem rådgivningssystemet

Stepwise incorporation of white clover (Trifolium repens L.)as fertiliser increases nitrogen fixation and improves nitrogen retention when intercropped with leek (Allium porrum L.)

Background and aims We investigated whether the incorporation of intercropped white clover as a split-dose fertiliser improves N retention of the plant-soil system in leek production. Methods White clover and leek were grown in pots where clover was stepwise incorporated into soil as fertiliser. Half of the clover was incorporated before leek transplantation (LT), the other half was incorporated 26 (S1) or 41 (S2) days after LT, compared with full incorporation of all clover (F) before LT. 15N injection and leaching studies were performed to investigate interspecific competition and the effects of precipitation on soil N availability. Results Stepwise incorporations increased or had no effect on leek growth, despite competition for N between white clover and leek. Compared to F, leek grown with stepwise incorporations had similar and lower N accumulation before the second incorporation, but N was higher at the end of the experiment. N2 fixation by white clover increased the total N input into soil and matched N availability with leek N demand and growth rate. Loss of inorganic N by leaching was lowest in S2 and highest in F. Conclusions Stepwise incorporations of white clover improved N retention in the plant-soil system and could be used to increase leek yield

PROTECFRUIT: beskyttet produktion af økologiske æbler og pærer

Folder om RDD2 projektet PROTECFRUI

Cover crop composition mediates the constraints and benefits of roller crimping and incorporation in organic white cabbage production

Roller-crimping of cover crops grown during winter may facilitate reduced tillage efforts in organic vegetable production. A one-year field experiment was conducted twice (autumn 2015-2017) in sandy loam soil in Denmark testing two cover crop termination systems, roller-crimping (RC) without tillage before crop planting, and full incorporation by tillage (FI) of mowed cover crops in organic white cabbage (Brassica oleracea L. convar. capitata var. capitata f. alba) production. Three legume species were investigated: winter faba bean (Vicia faba L.), winter pea (Pisum sativum L.), hairy vetch (Vicia villosa Roth), in pure stands or in a mixture with winter rye (Secale cereale L.). Roller-crimping reduced total white cabbage biomass by 31% (2016) and 19% (2017). Marketable white cabbage yield was 100% (2016) or 24% (2017) lower under RC than FI, likely caused by delayed N release from cover crops and reduced soil dehydrogenase activity. White cabbage root growth was reduced by RC following pea/rye, where N availability was low. Despite reduced root growth and yield, RC still had the advantage of reducing weed growth by 63% compared with FI three weeks after cover crop termination in 2017 and of decreasing N leaching risk, indicated by reduced soil mineral N content in 0.5-1.5 m depth in autumn. Marketable yield was 35% higher following legumes compared with legume/rye mixtures in both termination systems in 2017, due to 105 kg N ha−1 higher mineral soil N content in 0-2.5 m depth in the spring and faster N mineralisation from plant material with a lower C/N ratio. This yield increase corresponded with increased root growth following RC legumes. In contrast, legume/rye mixtures had the advantage of decreasing weed growth by 50-68% and N leaching risk by 22 kg ha−1 in 0.5−2 m depth. Although RC demonstrated ecological benefits such as weed suppression and indicated reduced N leaching risk, the trade-off with yield losses could create a barrier to adoption. This trade-off could be mitigated by using pure legume cover crops and by improving management of supplemental N fertility

Greenresilient: Innovative Cropping Systems In Organic Greenhouse Production

European organic greenhouse production systems are extremely differentiated. The more intensive ones have been object of debates, in the last decade, and a strong request for innovative solutions to reduce the level of intensification comes from the “organic sector”. An agroecological approach to organic production in protected conditions can be an option. This paper describes how scientists with competencies in soil science, agronomy, plant pathology, entomology and environmental sustainability assessment interact in the framework of GREENRESILIENT project (CORE Organic Cofund) to implement more resilient cropping systems in protected conditio

Greenresilient - innovativ og robust produktion i lavenergivæksthuse

En kort beskrivelse af Greenresilient projeket samt af det danske forsøgslayout

Greenresilient flyer

Presentation of Greenresilitent handed out at Open Hous

Tomater i et agroøkologisk system

I projektet GreenResilient demonstreres to økologiske dyrkningssystemer - et 'standard' system og et 'innovativt' system med en mere energivenlig og agroøkologisk tilgang