Organic wastes from bioenergy and ecological sanitation as a soil fertility improver: a field experiment in a tropical Andosol

dc.contributor.authorKrause, Ariane
dc.contributor.authorNehls, Thomas
dc.contributor.authorGeorge, Eckhard
dc.contributor.authorKaupenjohann, Martin
dc.date.accessioned2019-04-11T12:49:47Z
dc.date.available2019-04-11T12:49:47Z
dc.date.issued2016
dc.description.abstractAndosols require the regular application of phosphorus (P) to sustain crop productivity. On an Andosol in NW Tanzania, we studied the short-term effects of amending standard compost, biogas slurry and CaSa compost (containing biochar and sanitized human excreta) on (i) the soil's physico-chemical properties, on (ii) biomass growth and crop productivity, and on (iii) the plants' nutrient status. The practice-oriented experiment design included the intercropping of seven locally grown crop species planted on 9m2 plots with five repetitions arranged as a Latin rectangle. Differences in plant growth (biomass production and crop yield, e.g., of Zea mays) and crop nutrition (total C, N, P, K, Ca, Mg, Zn, etc.) were related to pH, CEC (cation exchange capacity), total C and the availability of nutrients (N, P, K, etc.) and water (water retention characteristics, bulk density, etc.) in the soil. None of the amendments had any significant effect on soil water availability, so the observed variations in crop yield and plant nutrition are attributed to nutrient availability. Applying CaSa compost increased the soil pH from 5.3 to 5.9 and the level of available P from 0.5 to 4.4mg per kg. Compared to the control, adding biogas slurry, standard compost and CaSa compost increased the aboveground biomass of Zea mays by, respectively, 140, 154 and 211%. The grain yields of maize on soil treated with biogas slurry, standard compost and CaSa compost were, respectively, 2.63, 3.18 and 4.40tha−1, compared to only 1.10tha−1 on unamended plots. All treatments enhanced crop productivity and increased the uptake of nutrients into the maize grains. The CaSa compost was most effective in mitigating P deficiency and soil acidification. We conclude that all treatments are viable as a substitute for synthetic fertilizers. Nevertheless, further steps are required to integrate the tested soil amendments into farm-scale nutrient management and to balance the additions and removals of nutrients, so that the cycle can be closed.en
dc.identifier.eissn2199-398X
dc.identifier.issn2199-3971
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/9311
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-8384
dc.language.isoenen
dc.relation.ispartof10.14279/depositonce-8104
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/en
dc.subject.ddc629 Andere Fachrichtungen der Ingenieurwissenschaftende
dc.subject.ddc577 Ökologiede
dc.subject.otherorganic wasteen
dc.subject.otherbioenergyen
dc.subject.otherecological sanitationen
dc.subject.othersoil improvementen
dc.subject.othersoil fertility managementen
dc.subject.otherorganischer Abfallde
dc.subject.otherBioenergiede
dc.subject.otherökologische Sanitärversorgungde
dc.subject.otherBodenverbesserungde
dc.subject.otherBodenfruchtbarkeitsmanagementde
dc.titleOrganic wastes from bioenergy and ecological sanitation as a soil fertility improver: a field experiment in a tropical Andosolen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.5194/soil-2-147-2016en
dcterms.bibliographicCitation.journaltitleSoilen
dcterms.bibliographicCitation.originalpublishernameCopernicus Publ.en
dcterms.bibliographicCitation.originalpublisherplaceGöttingenen
dcterms.bibliographicCitation.pageend162en
dcterms.bibliographicCitation.pagestart147en
dcterms.bibliographicCitation.volume2en
tub.accessrights.dnbfreeen
tub.affiliationFak. 6 Planen Bauen Umwelt>Inst. Landschaftsarchitektur und Umweltplanung>FG Umweltprüfung und Umweltplanungde
tub.affiliation.facultyFak. 6 Planen Bauen Umweltde
tub.affiliation.groupFG Umweltprüfung und Umweltplanungde
tub.affiliation.instituteInst. Landschaftsarchitektur und Umweltplanungde
tub.publisher.universityorinstitutionTechnische Universität Berlinen
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