Maize grain yield and grain zinc concentration response to zinc fertilization: A meta-analysis

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cg.authorship.typesCGIAR and developing country institute
cg.contributor.affiliationInternational Center for Tropical Agriculture
cg.contributor.affiliationKenyatta University
cg.contributor.donorCGIAR Trust Fund
cg.contributor.initiativeExcellence in Agronomy
cg.creator.identifierDominic Mutambu: 0000-0002-5394-5230
cg.creator.identifierJob Kihara: 0000-0002-4394-9553
cg.creator.identifierPeter BOLO: 0000-0002-4202-7557
cg.creator.identifierMichael Kinyua: 0000-0001-6106-3599
cg.identifier.doihttps://doi.org/10.1016/j.heliyon.2023.e16040
cg.isijournalISI Journal
cg.issn2405-8440
cg.issue5
cg.journalHeliyon
cg.numbere16040
cg.reviewStatusPeer Review
cg.subject.actionAreaResilient Agrifood Systems
cg.subject.impactAreaEnvironmental health and biodiversity
cg.subject.sdgSDG 2 - Zero hunger
cg.volume9
dc.contributor.authorMutambu, Dominic
dc.contributor.authorKihara, Job Maguta
dc.contributor.authorMucheru-Muna, Monicah
dc.contributor.authorBolo, Peter Omondi
dc.contributor.authorKinyua, Michael
dc.date.accessioned2023-09-12T08:50:28Zen
dc.date.available2023-09-12T08:50:28Zen
dc.identifier.urihttps://hdl.handle.net/10568/131827
dc.titleMaize grain yield and grain zinc concentration response to zinc fertilization: A meta-analysisen
dcterms.abstractZinc deficiency in agricultural soils is a current global agroecosystems challenge. Maize exhibits elevated susceptibility to Zn deficiency and low response to zinc fertilization. As a result, there are contradicting literature reports on the crop response to zinc fertilization. This meta-analysis synthesized the current evidence on maize response to zinc fertilization from different studies and highlighted the potential innovations to improve the crop response to zinc application. Systematic literature searches were conducted on the Web of Science and Google Scholar for peer-reviewed publications. From the selected publications, data extracted were maize grain yield and maize grain zinc concentration. The meta-analysis was conducted in R statistical environment using the metafor package. The ratio of means was the chosen effect size measure used. The assessment of effect size heterogeneity showed that the study effect sizes were significantly heterogeneous and also publication bias was evident. The analysis showed 17% and 25% maize grain yield and grain zinc concentration response to zinc fertilization. As a result, zinc fertilization was associated with yield increments of up to 1 t ha-1 and 7.19 mg kg-1 grain zinc concentration over the control (no zinc application). Despite the observed maize grain response to zinc application, the median concentration of grain Zn was below the 38 mg kg-1 recommended maize grain zinc concentration to combat human zinc deficiency (hidden hunger). As a result, potential innovations likely to achieve sufficient maize grain zinc content were highlighted including the use of nano-particulate zinc oxide, foliar zinc application, timing of zinc application, precision fertilization and zinc micro-dosing. Due to scanty literature on the progress of these innovations in maize, follow-up studies are recommended to evaluate their potential success in the agronomic bio-fortification of maize with zinc.en
dcterms.accessRightsOpen Access
dcterms.bibliographicCitationMutambu, D.; Kihara, J.; Mucheru-Muna, M.; Bolo, P.; Kinyua, M. (2023) Maize grain yield and grain zinc concentration response to zinc fertilization: A meta-analysis. Heliyon 9(5): e16040. ISSN: 2405-8440en
dcterms.issued2023-05
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherElsevier
dcterms.subjectmaizeen
dcterms.subjectyieldsen
dcterms.subjectzincen
dcterms.subjectsoil deficienciesen
dcterms.subjectsoil qualityen
dcterms.subjectdata analysisen
dcterms.subjectmicronutrient fertilizersen
dcterms.typeJournal Article

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