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The combined application of nitrogen and biochar reduced microbial carbon limitation in irrigated soils of West African urban horticulture

dc.date.accessioned2023-01-20T16:44:10Z
dc.date.available2023-01-20T16:44:10Z
dc.date.issued2022-07-16
dc.identifierdoi:10.17170/kobra-202301207419
dc.identifier.urihttp://hdl.handle.net/123456789/14381
dc.description.sponsorshipGefördert durch den Publikationsfonds der Universität Kassel
dc.language.isoeng
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectVegetable productioneng
dc.subjectWastewater irrigationeng
dc.subjectMicrobial biomasseng
dc.subjectFunctional diversityeng
dc.subjectAcidificationeng
dc.subject.ddc630
dc.titleThe combined application of nitrogen and biochar reduced microbial carbon limitation in irrigated soils of West African urban horticultureeng
dc.typeAufsatz
dcterms.abstractBackground: Intensive wastewater irrigated urban horticulture in sub-Saharan West Africa receives high nutrient inputs, which lead to large gaseous and leaching losses. The addition of biochar to the usually sandy soils may reduce these losses and improve the habitat conditions for soil microorganisms. Two similar experiments focused on crop yields and nutrient balances have been carried out over a 2-year period in semi-arid Ouagadougou, Burkina Faso, and in sub-humid Tamale, Ghana, representing to some extent different but typical locations in West Africa. // Methods Biochar and N fertilization effects were measured on soil microbial biomass carbon (MBC), fungal ergosterol, and functional diversity, estimated by multi-substrate-induced respiration. It was additionally possible to study the effects of clean water irrigation on the respective microbial properties in Tamale soil. // Results Sole biochar addition did not affect any soil chemical or soil biological properties analyzed. In contrast, biochar application with N fertilization increased the mean respiratory response of the 11 substrates added by 23% in the Ouagadougou soil and by 13% in the Tamale soil. N fertilization decreased soil pH in both cities by 1.1 units. However, a pH-H₂O of 4.7 led to reduced MBC and ergosterol contents at Tamale. Also, the Shannon index of the respiratory response was positively correlated with the soil pH. Clean water irrigation decreased the ergosterol content and increased the respiratory response to organic acids. Conclusions Biochar addition with N fertilization improved habitat conditions for soil microorganisms. An N fertilizer-induced decline in soil pH < 5 should be avoided, as it decreased MBC and microbial functional diversity.eng
dcterms.accessRightsopen access
dcterms.creatorFritz, Anne-Louise
dcterms.creatorJannoura, Ramia
dcterms.creatorBeuschel, René
dcterms.creatorSteiner, Christoph
dcterms.creatorBürkert, Andreas
dcterms.creatorJörgensen, Rainer Georg
dc.relation.doidoi:10.1186/s40538-022-00312-4
dc.subject.swdWestafrikager
dc.subject.swdPflanzenkohleger
dc.subject.swdGemüsebauger
dc.subject.swdAbwasserverwertungger
dc.subject.swdBodenversauerungger
dc.type.versionpublishedVersion
dcterms.source.identifiereissn:2196-5641
dcterms.source.journalChemical and Biological Technologies in Agricultureeng
dcterms.source.volumeVolume 9
kup.iskupfalse
dcterms.source.articlenumber48


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