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2021-01-18Zeitschriftenartikel DOI: 10.3389/fpls.2020.601455
Soilless Cultivation: Dynamically Changing Chemical Properties and Physical Conditions of Organic Substrates Influence the Plant Phenotype of Lettuce
dc.contributor.authorNerlich, Annika
dc.contributor.authorDannehl, Dennis
dc.date.accessioned2021-04-08T14:00:21Z
dc.date.available2021-04-08T14:00:21Z
dc.date.issued2021-01-18none
dc.date.updated2021-02-01T05:16:11Z
dc.identifier.urihttp://edoc.hu-berlin.de/18452/23298
dc.description.abstractIn agriculture, the increasing scarcity of arable land and the increase in extreme weather conditions has led to a large proportion of crops, especially vegetables, being cultivated in protected soilless cultivation methods to provide people with sufficient and high-quality food. Rockwool has been used for decades as a soil substitute in soilless cultivation. Since rockwool is not biodegradable, it is disposed in landfills after its use, which nowadays leads to ecological concerns and drives the search for alternative substrates, especially organic materials. The objectives of this study were to investigate the effects of organic materials (wood chips, sphagnum moss, and hemp fibers) in relation to rockwool substrate on plant growth and quality of lettuce as a result of physical and chemical properties of the mentioned substrates. We were able to show that sphagnum moss is a suitable substitute substrate for lettuce cultivation, contrary to hemp. All investigated substrates presented good physical properties, but differed in their decomposition stability. Within 8 weeks, 30% of the hemp and about 10% of both sphagnum and wood materials were degraded. It was concluded that the increased microbiological activity immobilized nitrogen and led to oxygen deficiency in the rhizosphere and resulted in increased phenolic acid contents in lettuce but poor yield on hemp. Sphagnum caused a pH decrease and accumulation of ammonium in the nutrient solution and allowed the highest yield for lettuce at moderate phenolic acid contents. Low yields were obtained on wood, which could possibly be increased by optimized nutrient solution, so that wood as an alternative to rockwool was not excluded. By applying used organic substrates as soil additives on arable land, the nutrients accumulated in it might fertilize the open field crops, thus saving mineral fertilizers. This, together with the avoidance of waste, would contribute to a greater sustainability.eng
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 4.0) Attribution 4.0 Internationalger
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectsphagnum mosseng
dc.subjectoxygeneng
dc.subjectlettuceeng
dc.subjectphenolic acidseng
dc.subjectnitrogen immobilizationeng
dc.subjectrockwool substituteseng
dc.subjectorganic substrateseng
dc.subjectsoilless cultivationeng
dc.subject.ddc570 Biowissenschaften; Biologienone
dc.titleSoilless Cultivation: Dynamically Changing Chemical Properties and Physical Conditions of Organic Substrates Influence the Plant Phenotype of Lettucenone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/23298-0
dc.identifier.doi10.3389/fpls.2020.601455none
dc.identifier.doihttp://dx.doi.org/10.18452/22691
dc.type.versionpublishedVersionnone
local.edoc.container-titleFrontiers in plant sciencenone
local.edoc.pages13none
local.edoc.anmerkungThis article was supported by the German Research Foundation (DFG) and the Open Access Publication Fund of Humboldt-Universität zu Berlin.none
local.edoc.type-nameZeitschriftenartikel
local.edoc.institutionLebenswissenschaftliche Fakultätnone
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-publisher-nameFrontiers Medianone
local.edoc.container-publisher-placeLausannenone
local.edoc.container-volume11none
dc.description.versionPeer Reviewednone
local.edoc.container-articlenumber601455none
dc.identifier.eissn1664-462X
local.edoc.affiliationNerlich, Annika; Division Biosystems Engineering, Faculty of Life Sciences, Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences, Humboldt University of Berlin, Berlin, Germanynone
local.edoc.affiliationDannehl, Dennis; Division Biosystems Engineering, Faculty of Life Sciences, Albrecht Daniel Thaer-Institute of Agricultural and Horticultural Sciences, Humboldt University of Berlin, Berlin, Germanynone

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