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2019-10-17Zeitschriftenartikel DOI: 10.18452/20915
Weed Suppression in Only-Legume Cover Crop Mixtures
dc.contributor.authorElsalahy, Heba
dc.contributor.authorDöring, Thomas
dc.contributor.authorSonoko Bellingrath-Kimura, Dorothea
dc.contributor.authorArends, Danny
dc.date.accessioned2019-12-11T13:43:02Z
dc.date.available2019-12-11T13:43:02Z
dc.date.issued2019-10-17none
dc.identifier.other10.3390/agronomy9100648
dc.identifier.urihttp://edoc.hu-berlin.de/18452/21631
dc.description.abstractWeed suppression is a potential benefit of cover crop mixtures, as species diversity may allow for combining early and late-season competition with weeds. Here, we studied if this is possible for only-legume mixtures containing species with different growth rates, by testing two legumes, alsike clover (AC; Trifolium hybridum L.) and black medic (BM; Medicago lupulina L.) in two field trials sown in 2016 and 2017. Five AC:BM ratios (100:0, 67:33, 50:50, 33:67, and 0:100) were grown at three densities (50%, 100%, and 150% of recommended seed density). Cover crop and weed aboveground biomass (CCB and WB, respectively) were harvested three times, after establishment in spring (H1), in summer (H2), and in autumn after mulching (H3). Compared to fallow plots, all monocultures and mixtures showed early-season weed suppression in terms of biomass production and more efficiency over time with an average reduction of 42%, 52%, and 96% in 2016, and 39%, 55%, and 89% in 2017 at H1, H2, and H3, respectively. Out of 54 mixture treatments, only eight mixtures showed stronger weed suppression than monocultures. Mixtures reduced WB by 28%, as an average value, in 2017 compared to the respective monocultures, but not significantly in 2016, indicating that the crop diversity effect on weeds was dependent on the growing environment. Weed suppression was significantly higher at 100% and 150% seed density than 50%, but no significant differences were determined between 100% and 150% seed density. After mulching, no density effect was observed on CCB and WB. In conclusion, AC and BM can be used as a keystone species on weed suppression for sustainable agriculture as they possess plasticity to suppress weeds when higher biomass productivity is limited by environmental conditions. However, their diversity effects are time and condition dependent. Appropriate seed density and mulching can successfully be employed in weed management, but seed density may not have an effect after mulching.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.subjectasynchronyeng
dc.subjectcrop diversificationeng
dc.subjectforage legumeeng
dc.subjectfunctional traitseng
dc.subjectinterspecific interactioneng
dc.subjectmixed croppingeng
dc.subjectweed controleng
dc.subject.ddc630 Landwirtschaft und verwandte Bereichenone
dc.titleWeed Suppression in Only-Legume Cover Crop Mixturesnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/21631-2
dc.identifier.doihttp://dx.doi.org/10.18452/20915
dc.type.versionpublishedVersionnone
local.edoc.container-titleAgronomynone
local.edoc.pages19none
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-nameMDPInone
local.edoc.container-publisher-placeBaselnone
local.edoc.container-volume9none
local.edoc.container-issue10none
dc.description.versionPeer Reviewednone
local.edoc.container-articlenumber648
dc.identifier.eissn2073-4395

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