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Lowland rice yield and profit response to fertilizer application in Rwanda

dc.contributor.authorNabahungu, N.L.
dc.contributor.authorCyamweshi, A.R.
dc.contributor.authorKayumba, J.
dc.contributor.authorKokou, K.
dc.contributor.authorMukuralinda, A.
dc.contributor.authorCirhuza, J.M.
dc.contributor.authorWortmann, C.S.
dc.date.accessioned2020-08-06T14:25:46Z
dc.date.available2020-08-06T14:25:46Z
dc.date.issued2019-12-10
dc.identifier.citationNabahungu, N.L., Cyamweshi, A.R., Kayumba, J., Kokou, K., Mukuralinda, A., Cirhuza, J.M. & Wortmann, C.S. (2020). Lowland rice yield and profit response to fertilizer application in Rwanda. Agronomy Journal, 112(2), 1423-1432.
dc.identifier.issn0002-1962
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6917
dc.description.abstractRice (Oryza sativa ) production in Rwanda increased by 70% while yield ha−1 decreased during the past decade. Yield has biotic and abiotic constraints including inadequate nutrient supply. Yield response functions for N, P, and K were determined in eight marshlands grouped into four clusters. Additional treatment allowed for the diagnosis of response to Mg–S–Zn–B (MgSZnB). Rice grain yield with no fertilizer applied was 2.27 Mg ha−1. Mean yield increases were 2.35, 1.53, and 1.71 Mg ha−1 with N, P, and K application, respectively. The mean economically optimal rates (EOR) were 58 to >150, 11–30, and 21–35 kg ha−1 for N, P, and K, respectively, depending on cluster and the cost of fertilizer. Yield responses to nutrient rates were similar across marshland clusters, and a single response function for each of P and K can serve all four clusters, while the response to N differed for Cluster B compared with A, BC, and C. Net returns to applied P and K were greater than for N, but the application of N is likely needed for such responses to P and K. The MgSZnB resulted in a mean grain yield increase of 1.72 Mg ha−1 with increases in all marshlands, but the information was not sufficient to determine which nutrients of MgSZnB were deficient or their optimal application rates. Fertilizer use can be very profitable for rice production in Rwanda. Profit can be enhanced with the application at less than EOR when fertilizer use is financially constrained.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.description.sponsorshipAlliance for a Green Revolution in Africa
dc.language.isoen
dc.subjectOryza Sativa
dc.subjectRwanda
dc.subjectYields
dc.subjectProfit
dc.subjectCosts
dc.subjectFertilizers
dc.subjectBiotic Factors
dc.subjectAbiotic Factors
dc.titleLowland rice yield and profit response to fertilizer application in Rwanda
dc.typeJournal Article
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.crpRice
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationRwanda Agricultural Board
cg.contributor.affiliationWorld Agroforestry Centre
cg.contributor.affiliationUniversity of Nebraska-Lincoln
cg.coverage.regionAfrica
cg.coverage.regionCentral Africa
cg.coverage.countryRwanda
cg.coverage.hubCentral Africa Hub
cg.researchthemeNatural Resource Management
cg.identifier.bibtexciteidNABAHUNGU:2020
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgribusiness
cg.iitasubjectAgronomy
cg.iitasubjectFarm Management
cg.iitasubjectFood Security
cg.iitasubjectIntegrated Soil Fertility Management
cg.iitasubjectSoil Fertility
cg.journalAgronomy Journal
cg.notesOpen Access Journal
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1002/agj2.20006
cg.iitaauthor.identifierNsharwasi Nabahungu: 0000-0002-2104-3777


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