Quantifying soil carbon stocks and humification through spectroscopic methods: a scoping assessment in EMBU-Kenya

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cg.authorship.typesCGIAR and developing country instituteen
cg.contributor.affiliationEmpresa Brasileira de Pesquisa Agropecuáriaen
cg.contributor.affiliationAgriEntech Ltda, Brazilen
cg.contributor.affiliationInternational Crops Research Institute for the Semi-Arid Tropicsen
cg.contributor.affiliationInternational Institute of Tropical Agricultureen
cg.contributor.affiliationInternational Potato Centeren
cg.contributor.crpMaize
cg.coverage.countryKenya
cg.coverage.iso3166-alpha2KE
cg.coverage.regionAfrica
cg.coverage.regionEastern Africa
cg.creator.identifierLieven Claessens: 0000-0003-2961-8990
cg.howPublishedFormally Publisheden
cg.identifier.doihttps://doi.org/10.1016/j.jenvman.2018.12.108en
cg.identifier.iitathemeNATURAL RESOURCE MANAGEMENT
cg.isijournalISI Journalen
cg.issn0301-4797en
cg.journalJournal of Environmental Managementen
cg.reviewStatusPeer Reviewen
cg.subject.iitaAGRONOMYen
cg.subject.iitaCROP SYSTEMSen
cg.subject.iitaNATURAL RESOURCE MANAGEMENTen
cg.volume234en
dc.contributor.authorSegnini, A.en
dc.contributor.authorPosadas, A.en
dc.contributor.authorSilva, W.T.L. daen
dc.contributor.authorMilori, D.M.en
dc.contributor.authorGavilan, C.en
dc.contributor.authorClaessens, Lievenen
dc.contributor.authorQuiróz, R.en
dc.date.accessioned2019-01-30T08:24:19Zen
dc.date.available2019-01-30T08:24:19Zen
dc.identifier.urihttps://hdl.handle.net/10568/99228
dc.titleQuantifying soil carbon stocks and humification through spectroscopic methods: a scoping assessment in EMBU-Kenyaen
dcterms.abstractA soil carbon assessment was performed comparing agricultural cropping systems with natural vegetation along a sampling transect spanning different agro-ecologies on the eastern foot slopes of Mount Kenya in Embu county, 125 km from Nairobi, Kenya. The aim was to determine differences in soil carbon stocks and carbon recalcitrance and relate these to soil textural class, altitude, climatic parameters and land use. Soils from main agricultural systems as tea, coffee and maize-based intercropping, as well as from natural vegetation cover were sampled in triplicates, in five layers from 0 to 30 cm in depth and processed for total carbon analysis. The whole soil samples were also analysed using Laser-Induced Fluorescence Spectroscopy (LIFS) to assess carbon humification. Prototype portable equipment intended for future in situ analysis was used in the lab to ascertain the structure of the most recalcitrant and stable carbon present in different agro-ecosystems. In addition, Near Infrared Spectroscopy (NIRS) was tested for the quantitative analysis of soil carbon, showing that it is a reproducible and low-cost method that provided satisfactory results under the processing conditions of the samples. Results showed wide variation in the level and quality of carbon stored in the soils, depending on soil texture, land use, elevation, climate, agricultural practices and land use history. Considering the heterogeneous nature of sampled soils and the performance of NIRS and LIFS, these results can be used as a basis for the development of fully portable systems able to provide rapid, clean and potentially cost-effective relevant information for soil management.en
dcterms.accessRightsLimited Access
dcterms.audienceScientistsen
dcterms.available2019-01-12
dcterms.bibliographicCitationSegnini, A., Posadas, A., da Silva, W.T.L., Milori, D.M., Gavilan, C., Claessens, L. & Quiroz, R. (2019). Quantifying soil carbon stocks and humification through spectroscopic methods: a scoping assessment in EMBU-Kenya. Journal of Environmental Management, 234, 476-483.en
dcterms.extent476-483en
dcterms.issued2019-03
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherElsevieren
dcterms.subjectagriculturalen
dcterms.subjectcropping systemsen
dcterms.subjectmonten
dcterms.subjectkenyaen
dcterms.subjectandosolsen
dcterms.subjectnitisolsen
dcterms.subjectsoilen
dcterms.subjectcarbonen
dcterms.subjectstocksen
dcterms.subjectspectroscopyen
dcterms.typeJournal Article

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