Nutrient utilization from a grass-clover sward by a leek crop in relation to time and tillage practices

Koen Willekens, Bart Vandecasteele, Bert Van Gils, Alex De Vliegher, Lieven Delanote, Annelies Beeckman, Stefaan De Neve

    Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureC3: Congres abstractpeer review


    Non-inversion tillage favours soil quality. However, in organic agriculture, where no herbicides are used and external inputs are restricted, non-inversion tillage needs to be optimized by combining it with green manure intercropping. The effect of green manure in a reduced tillage system is currently assessed in 2 field trials (2012-2013). In the first growing season a 2-year old grass-clover sward was mechanically destroyed without ploughing before leek was planted in June, and compared to a treatment with conventional ploughing. The grass-clover sward was destroyed either in March or in May. In May, an additional factor was introduced, namely the removal of a full grass-clover cut and a repetitively mulched grass-clover sward. Despite the exceptional wet spring in 2012, short periods of drier weather made mechanical destruction in combination with a non-inversion tillage practice feasible. N and P release from the green manure and utilization by the leek crop have been examined. CO2 emission, N availability in soil and crop yield significantly depended on time and mode of destruction of the grass-clover sward. N distribution in the soil profile seemed to be dependent of tillage practice. We have indications that CO2 emission was reduced by non-inversion tillage.
    Acknowledgements: The author(s) gratefully acknowledge the financial support for this project provided by the CORE Organic II funding bodies, being partners of the FP7 ERA-Net project, CORE Organic II (
    Oorspronkelijke taalEngels
    TitelBook of abstracts
    Aantal pagina’s1
    PublicatiestatusGepubliceerd - 21-jan-2013
    Evenement7th Organic Producers’ Conference - Birmingham, Verenigd Koninkrijk
    Duur: 22-jan-201323-jan-2013


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