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Nitrogen budgets and nitrogen use efficiency as agricultural performance indicators in Lake Victoria basin

dc.contributor.authorNtinyari, W.
dc.contributor.authorGweyi-Onyango, J.
dc.contributor.authorGiweta, M.
dc.contributor.authorMutegi, J.
dc.contributor.authorMochoge, B.
dc.contributor.authorNziguheba, G.
dc.contributor.authorMasso, C.
dc.date.accessioned2023-03-30T10:35:54Z
dc.date.available2023-03-30T10:35:54Z
dc.date.issued2022-10-21
dc.identifier.citationNtinyari, W., Gweyi-Onyango, J., Giweta, M., Mutegi, J., Mochoge, B., Nziguheba, G. & Masso, C. (2022). Nitrogen budgets and nitrogen use efficiency as agricultural performance indicators in Lake Victoria basin. Frontiers in Sustainable Food Systems, 6:1023579, 1-14.
dc.identifier.issn2571-581X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/8114
dc.description.abstractToo little nitrogen (N) is a threat to crop productivity and soil fertility in subSaharan Africa (SSA). Nitrogen budgets (NB) and nitrogen use e ciency (NUE) are critical tools for assessing N dynamics in agriculture and have received little or no attention in the region. Data were collected from smallholder farmers clustered into two categories, farmers applying and farmers not applying N fertilizers. NB were calculated using the Coupled Human and Natural Systems (CHANS) model approach for field and farm spatial scales. The results showed spatial variabilities in NB and NUE at the field level (maize and rice) across all the catchments. At the field level, N balances were negative for the two crops in all the catchments. Similarly, at the farm gate, a deficit of −78.37 kg N ha−1 was observed, an indicator of soil N mining. NUE values at the field scale varied across the catchments for both crops, with values for maize grown without N ranging from 25.76 to 140.18%. Even with the application of mineral N at higher levels in rice fields compared to maize fields, NUE values ranged between 81.92 and 224.6%. Our study revealed that the Lake Victoria region suers from ine cient N cycling due to depleted soil N pools and low synchrony between N input and N removal. Therefore, a challenge lies in exploiting more sustainable N sources for farmers in the region for sustainable farming systems. The NB and NUE provide critical information to agriculture stakeholders to develop environmental, agronomic, and economically viable N management solutions.
dc.description.sponsorshipInternational Nitrogen Management System
dc.format.extent1-14
dc.language.isoen
dc.subjectCropping Systems
dc.subjectFertilizers
dc.subjectNitrogen
dc.subjectNutrient Management
dc.subjectSoil Exhaustion
dc.subjectEast Africa
dc.titleNitrogen budgets and nitrogen use efficiency as agricultural performance indicators in Lake Victoria basin
dc.typeJournal Article
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationKenyatta University
cg.contributor.affiliationAfrican Plant Nutrition Institute
cg.coverage.regionAfrica
cg.coverage.regionCentral Africa
cg.coverage.regionEast Africa
cg.coverage.countryBurundi
cg.coverage.countryKenya
cg.coverage.countryRwanda
cg.coverage.countryTanzania
cg.coverage.countryUganda
cg.coverage.hubCentral Africa Hub
cg.researchthemeNatural Resource Management
cg.identifier.bibtexciteidWINNIE:2022b
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectCrop Systems
cg.iitasubjectFood Security
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Production
cg.iitasubjectSoil Fertility
cg.journalFrontiers in Sustainable Food Systems
cg.notesOpen Access Journal; Published online: 21 Oct 2022
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://doi.org/10.3389/fsufs.2022.1023579
cg.iitaauthor.identifierGenerose Nziguheba: 0000-0003-4227-2242
cg.iitaauthor.identifierCargele Masso: 0000-0002-3980-6832
cg.futureupdate.requiredNo
cg.identifier.issue1023579
cg.identifier.volume6


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