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Excessive Nitrate Limits the Sustainability of Deep Compost Mulch in Organic Market Gardening

dc.date.accessioned2023-06-19T10:17:48Z
dc.date.available2023-06-19T10:17:48Z
dc.date.issued2023-05-18
dc.identifierdoi:10.17170/kobra-202306198256ger
dc.identifier.urihttp://hdl.handle.net/123456789/14839
dc.description.sponsorshipGefördert durch den Publikationsfonds der Universität Kasselger
dc.language.isoengger
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectorganic vegetablesger
dc.subjectorganic mulchger
dc.subjectno-digger
dc.subjectno-tillger
dc.subjectsoil mineral Nger
dc.subjectnitrate leachingger
dc.subjectdenitrificationger
dc.subject.ddc570ger
dc.subject.ddc630ger
dc.titleExcessive Nitrate Limits the Sustainability of Deep Compost Mulch in Organic Market Gardeningger
dc.typeAufsatzger
dcterms.abstractMarket gardening is a widespread practice of bio-intensive vegetable production characterized by direct marketing, small-scale farming structures, high crop densities, and innovative cultivation approaches. Currently, deep compost mulch (DCM) is a popular trend among related growing techniques. The combination of no-till and a permanent mulch of compost aims to improve soil fertility, regulate soil temperature, retain soil moisture, and control weeds. To address the problem of perennial weeds in organic no-till, deep mulch layers of typically 150 mm are used. The amount of compost required and the associated N inputs are immense and carry the risk of environmentally harmful N surpluses that can be lost through nitrate leaching or denitrification. The aim of this study is to evaluate the use of compost as mulch and to investigate N dynamics under DCM. For this purpose, a literature review was conducted, and soil inorganic nitrogen (Nmin-N) was measured under on-farm conditions up to a soil depth of 900 mm in a market garden with DCM in Germany for one year. Furthermore, based on the collected data, the different N pathways were calculated using the N-Expert and NDICEA models and simulated for two additional scenarios. Results from field measurements showed a strongly increased N-surplus not taken up by the crops and a shift of Nmin-N to deeper soil layers for municipal organic waste compost (MW), with an average accumulation of 466 kg Nmin-N ha-¹ at 600–900 mm depth. N inputs from DCM can be significantly reduced by the use of green waste compost (GW) with low bulk density or wood waste compost (WW) with an additional high C/N ratio.ger
dcterms.accessRightsopen accessger
dcterms.creatorRuch, Benjamin
dcterms.creatorHefner, Margita
dcterms.creatorSradnick, André
dcterms.extent13 Seiten
dc.relation.doidoi:10.3390/agriculture13051080
dc.subject.swdMulchger
dc.subject.swdNachhaltigkeitger
dc.subject.swdBiologische Landwirtschaftger
dc.subject.swdDirektsaatger
dc.subject.swdDenitrifikationger
dc.type.versionpublishedVersionger
dcterms.source.identifiereissn:2077-0472ger
dcterms.source.issueIssue 5ger
dcterms.source.journalAgricultureger
dcterms.source.volumeVolume 13ger
kup.iskupfalseger
dcterms.source.articlenumber1080


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Except where otherwise noted, this item's license is described as Namensnennung 4.0 International