Long-term application of low C:N residues enhances maize yield and soil nutrient pools across Kenya

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cg.authorship.typesCGIAR and advanced research institute
cg.contributor.affiliationOhio State University
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.crpAgriculture for Nutrition and Health
cg.contributor.crpMaize
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.crpGrain Legumes
cg.coverage.countryKenya
cg.coverage.iso3166-alpha2KE
cg.coverage.regionAfrica
cg.coverage.regionEastern Africa
cg.creator.identifierMoses Thuita: 0000-0002-6731-9492
cg.creator.identifierbernard vanlauwe: 0000-0001-6016-6027
cg.howPublishedFormally Published
cg.identifier.doihttps://doi.org/10.1007/s10705-019-10005-4
cg.identifier.iitathemeNATURAL RESOURCE MANAGEMENT
cg.isijournalISI Journal
cg.issn1385-1314
cg.issue3
cg.journalNutrient Cycling in Agroecosystems
cg.reviewStatusPeer Review
cg.subject.iitaNATURAL RESOURCE MANAGEMENT
cg.volume114
dc.contributor.authorSprunger, C.D.
dc.contributor.authorCulman, S.W.
dc.contributor.authorPalm, Cheryl A.
dc.contributor.authorThuita, Moses N.
dc.contributor.authorVanlauwe, Bernard
dc.date.accessioned2019-07-11T10:09:34Zen
dc.date.available2019-07-11T10:09:34Zen
dc.identifier.urihttps://hdl.handle.net/10568/102155
dc.titleLong-term application of low C:N residues enhances maize yield and soil nutrient pools across Kenyaen
dcterms.abstractDeclines in soil fertility and limited access to inorganic nitrogen (N) fertilizer constrain crop production in Sub-Saharan Africa. The incorporation of organic residues could increase nutrient mineralization and replenish soil carbon (C), however, the effect that long-term residue management (10+ years) has on maize (Zea mays L.) yields and soil nutrient pools (C and N) is largely unknown. In four identical long-term trials in Kenya that differ by soil type and climate, we compared maize yield and soil C (0–0.15 m) across four treatments comparing organic inputs of contrasting C:N ratios: tithonia [Tithonia diversifolia (Hemsl.) A. Gray] + N (120 kg N ha−1); tithonia − N (0 kg N ha−1); maize stover + N (120 kg N ha−1); maize stover − N (0 kg N ha−1). On average, maize yields were 92% greater under tithonia compared to maize stover at the sandy sites and in general followed this trend: tithonia + N > tithonia − N = stover + N > stover − N. The continuous application of tithonia also increased soil C and N pools; for instance, mineralizable C was up to 57% greater than that of maize stover at the sandy sites. Increases in yield and nutrient pools under tithonia were less apparent at the clay sites. When exploring the relationship between soil C and maize yield, we found that both mineralizable and processed pools were related to agronomic performance. Our findings demonstrate that low C:N residues could significantly benefit crop production and enhance soil organic matter at sandy sites across Kenya.en
dcterms.accessRightsLimited Access
dcterms.audienceScientists
dcterms.available2019-06-05
dcterms.bibliographicCitationSprunger, C.D., Culman, S.W., Palm, C.A., Thuita, M. & Vanlauwe, B. (2019). Long-term application of low C: N residues enhances maize yield and soil nutrient pools across Kenya. Nutrient Cycling in Agroecosystems, 114, 261–276en
dcterms.extent261-276
dcterms.issued2019-07
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherSpringer
dcterms.subjectmaizeen
dcterms.subjectcrop productionen
dcterms.subjectsoil organic matteren
dcterms.subjectnutrientsen
dcterms.subjectcyclingen
dcterms.subjectagroecosystemsen
dcterms.subjectsoil fertilityen
dcterms.subjectafrica south of saharaen
dcterms.typeJournal Article

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