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Effective Striga control and yield intensification on maize farms in western Kenya with N fertilizer and herbicide-resistant variety

dc.contributor.authorRoobroeck, D.
dc.contributor.authorKimutai, G.
dc.contributor.authorKanampiu, F.
dc.contributor.authorNg'etich, W.
dc.contributor.authorRoing de Nowina, K.
dc.contributor.authorVanlauwe, B.
dc.date.accessioned2023-04-11T08:49:56Z
dc.date.available2023-04-11T08:49:56Z
dc.date.issued2023-05-15
dc.identifier.citationRoobroeck, D., Kimutai, G., Kanampiu, F., Ng'etich, W., Roing de Nowina, K. & Vanlauwe, B. (2023). Effective Striga control and yield intensification on maize farms in western Kenya with N fertilizer and herbicide-resistant variety. Field Crops Research, 296: 108924, 1-8.
dc.identifier.issn0378-4290
dc.identifier.urihttps://hdl.handle.net/20.500.12478/8123
dc.description.abstractContext Maize production in western Kenya is limited by the spread of parasitic weed Striga hermonthica and depletion of soil nutrient stocks. Nitrogen (N) fertilizer and imidazolinone resistant (IR) maize are key elements in the agronomic toolbox to control infestations and enhance yields Research question The circumstances under which their use, individually or combined, is most effective on farmer fields have not been well documented. Inappropriate management decisions and low returns on investments arise from this knowledge gap, causing hunger and poverty in smallholder communities to persist. Methods Experiments were carried out on 60 fields in three different agroecosystems of western Kenya using full-factorial treatments with non-herbicide treated maize (DH) and herbicide treated maize (IR), and N fertilizer omission and application. Trials were stratified on a field with low and high soil fertility within individual farms and repeated over two seasons. Results Cultivating IR maize instead of DH maize decreased the emergence of Striga with 13 shoots m−2 on average while applying N fertilizer on DH maize led to a reduction of 5 shoots m−2 on average. Decreases of Striga by use of IR maize and N fertilizer were between 6 and 23 shoots m−2 larger at the site with high levels of infestation than at the sites with medium or low emergence. Input of N fertilizer increased grain harvests by 0.59 ton ha−1 on average while use of IR maize enhanced the productivity with 0.33 ton ha−1 on average. Use of N fertilizer had similar yield effects in all three sites, whereas use of IR maize at the site with high Striga emergence increased maize production by 0.26–0.39 ton ha−1 more than at the sites with medium or low emergence. Conclusions The greater Striga responses to IR maize and the greater yield responses to N fertilizer demonstrate their use could be optimized according to field conditions and management goals. Combining IR maize and N fertilizer has larger added yield benefits where their individual effects on grain productivity are smaller. Significance Findings from this study indicate that farmers in western Kenya require guidance on how to align the use of herbicide resistant maize and inorganic N inputs with the level of Striga infestation and maize yield on their fields for effectively controlling the pernicious weed and enhancing food production.
dc.description.sponsorshipSwedish University of Agricultural Sciences
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-8
dc.language.isoen
dc.subjectWeed Control
dc.subjectSoil Fertility
dc.subjectMaize
dc.subjectStriga
dc.subjectSustainable Intensification
dc.subjectKenya
dc.titleEffective Striga control and yield intensification on maize farms in western Kenya with N fertilizer and herbicide-resistant variety
dc.typeJournal Article
cg.contributor.crpGrain Legumes
cg.contributor.crpMaize
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Eldoret
cg.contributor.affiliationGOPA Worldwide Consultants, Germany
cg.contributor.affiliationSwedish University of Agricultural Sciences
cg.contributor.affiliationConsultative Group on International Agricultural Research
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryKenya
cg.coverage.hubCentral Africa Hub
cg.researchthemeNatural Resource Management
cg.identifier.bibtexciteidROOBROECK:2023
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectDisease Control
cg.iitasubjectFood Security
cg.iitasubjectMaize
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.iitasubjectSoil Fertility
cg.journalField Crops Research
cg.notesOpen Access Article; Published online: 04 Apr 2023
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://doi.org/10.1016/j.fcr.2023.108924
cg.iitaauthor.identifierDries Roobroeck: 0000-0003-3176-4444
cg.iitaauthor.identifierFred Kanampiu: 0000-0002-2480-6813
cg.iitaauthor.identifierbernard vanlauwe: 0000-0001-6016-6027
cg.futureupdate.requiredNo
cg.identifier.issue108924
cg.identifier.volume296


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