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dc.date.accessioned2016-01-30T17:38:18Z
dc.date.available2016-01-30T17:38:18Z
dc.date.created2013-10-01T07:49:01Z
dc.date.issued2013
dc.identifier.citationCornelissen, Gerard Martinsen, Vegard Shitumbanuma, Victor Alling, Vanja Karin Gunilla Breedveld, Gijs D. Rutherford, W. Sparrevik, Lars Magnus Hale, Sarah Obia, Alfred Mulder, Jan . Biochar Effect on Maize Yield and Soil Characteristics in Five Conservation Farming Sites in Zambia. Agronomy. 2013, 3(2), 256-274
dc.identifier.urihttp://hdl.handle.net/10852/48830
dc.description.abstractBiochar addition to agricultural soils can improve soil fertility, with the added bonus of climate change mitigation through carbon sequestration. Conservation farming (CF) is precision farming, often combining minimum tillage, crop rotation and residue retention. In the present farmer-led field trials carried out in Zambia, the use of a low dosage biochar combined with CF minimum tillage was tested as a way to increase crop yields. Using CF minimum tillage allows the biochar to be applied to the area where most of the plant roots are present and mirrors the fertilizer application in CF practices. The CF practice used comprised manually hoe-dug planting 10-L sized basins, where 10%–12% of the land was tilled. Pilot trials were performed with maize cob biochar and wood biochar on five soils with variable physical/chemical characteristics. At a dosage as low as 4 tons/ha, both biochars had a strong positive effect on maize yields in the coarse white aeolian sand of Kaoma, West-Zambia, with yields of 444% ± 114% (p = 0.06) and 352% ± 139% (p = 0.1) of the fertilized reference plots for maize and wood biochar, respectively. Thus for sandy acidic soils, CF and biochar amendment can be a promising combination for increasing harvest yield. Moderate but non-significant effects on yields were observed for maize and wood biochar in a red sandy clay loam ultisol east of Lusaka, central Zambia (University of Zambia, UNZA, site) with growth of 142% ± 42% (p > 0.2) and 131% ± 62% (p > 0.2) of fertilized reference plots, respectively. For three other soils (acidic and neutral clay loams and silty clay with variable cation exchange capacity, CEC), no significant effects on maize yields were observed (p > 0.2). In laboratory trials, 5% of the two biochars were added to the soil samples in order to study the effect of the biochar on physical and chemical soil characteristics. The large increase in crop yield in Kaoma soil was tentatively explained by a combination of an increased base saturation (from <50% to 60%–100%) and cation exchange capacity (CEC; from 2–3 to 5–9 cmol/kg) and increased plant-available water (from 17% to 21%) as well as water vapor uptake (70 mg/g on maize cob biochar at 50% relative humidity).en_US
dc.languageEN
dc.language.isoenen_US
dc.publisherMDPI AG
dc.rightsAttribution 3.0 Unported
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/
dc.titleBiochar Effect on Maize Yield and Soil Characteristics in Five Conservation Farming Sites in Zambiaen_US
dc.typeJournal articleen_US
dc.creator.authorCornelissen, Gerard
dc.creator.authorMartinsen, Vegard
dc.creator.authorShitumbanuma, Victor
dc.creator.authorAlling, Vanja Karin Gunilla
dc.creator.authorBreedveld, Gijs D.
dc.creator.authorRutherford, W.
dc.creator.authorSparrevik, Lars Magnus
dc.creator.authorHale, Sarah
dc.creator.authorObia, Alfred
dc.creator.authorMulder, Jan
cristin.unitcode185,15,22,0
cristin.unitnameInstitutt for geofag
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.cristin1054173
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Agronomy&rft.volume=3&rft.spage=256&rft.date=2013
dc.identifier.jtitleAgronomy
dc.identifier.volume3
dc.identifier.issue2
dc.identifier.startpage256
dc.identifier.endpage274
dc.identifier.doihttp://dx.doi.org/10.3390/agronomy3020256
dc.identifier.urnURN:NBN:no-52668
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn2073-4395
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/48830/1/Cornelissen_Martinsen_etal.pdf
dc.type.versionPublishedVersion


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