Yield variation of rainfed rice as affected by field water availability and N fertilizer use in central Benin

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cg.authorship.typesCGIAR and advanced research institute
cg.contributor.affiliationAfrica Rice Center
cg.contributor.affiliationUniversity of Bonn
cg.contributor.affiliationLeibniz-Zentrum für Agrarlandschaftsforschung
cg.contributor.affiliationJapan International Research Center for Agricultural Sciences
cg.contributor.affiliationOlam International Ltd
cg.contributor.crpRice
cg.coverage.countryBenin
cg.coverage.iso3166-alpha2BJ
cg.coverage.regionAfrica
cg.coverage.regionSub-Saharan Africa
cg.coverage.regionWestern Africa
cg.howPublishedFormally Published
cg.identifier.doihttps://doi.org/10.1007/s10705-017-9898-y
cg.isijournalISI Journal
cg.issn1385-1314
cg.issn1573-0867
cg.issue2
cg.journalNutrient Cycling in Agroecosystems
cg.reviewStatusPeer Review
cg.volume110
dc.contributor.authorNiang, A.
dc.contributor.authorBecker, M.
dc.contributor.authorEwert, F.
dc.contributor.authorTanaka, A.
dc.contributor.authorDieng, I.
dc.contributor.authorSaito, Kazuki
dc.date.accessioned2019-07-02T14:56:57Zen
dc.date.available2019-07-02T14:56:57Zen
dc.identifier.urihttps://hdl.handle.net/10568/102025
dc.titleYield variation of rainfed rice as affected by field water availability and N fertilizer use in central Beninen
dcterms.abstractRice is mainly grown under rainfed conditions in West Africa. Unpredictable and variable rainfall, poor soil quality, and suboptimal crop management practices are the main determinants of low productivity. We assessed the effects of soil water availability and fertilizer application, and their interaction on the yield of rainfed rice in Glazoué, Department of Zou-Collines, central Benin between 2010 and 2013. On-farm fertilizer management trials and field surveys were conducted in 13–39 farmers' fields per year. Field water conditions were visually assessed three times per week during the rice-growing season and flood and drought indices were calculated on the basis of number of days with ponded water and dry surface soil relative to the total number of days for the vegetative, the reproductive and whole rice-growing period. Variations in flood and drought indices were related to the sand content of the soil. While nitrogen was the most limiting nutrient, average response to N fertilizer application was low with an agronomic N use efficiency of only 7–9 kg grain per kg of N applied. Year-to-year variation in rainfall and spatial variation in field water status affected both rice yield and response to N fertilizer. Some 47% of the observed yield variation was explained by field water status and the amounts of N fertilizer applied, with rice response to N fertilizer being less when water was limited. We conclude that the prevailing blanket fertilizer recommendations are unlikely to contribute to yield increases in rainfed systems of West Africa. There is a need for field-specific recommendations that consider soil texture and the spatial–temporal dynamics of water availability.en
dcterms.accessRightsLimited Access
dcterms.available2017-12-15
dcterms.bibliographicCitationNiang, A., Becker, M., Ewert, F., Tanaka, A., Dieng, I., and Saito, K. 2018. Yield variation of rainfed rice as affected by field water availability and N fertilizer use in central Benin. Nutrient Cycling in Agroecosystems 110(2): 293–305en
dcterms.extentpp. 293-305
dcterms.issued2018-03
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherSpringer
dcterms.subjectdroughten
dcterms.subjectwest africaen
dcterms.typeJournal Article

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