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dc.contributor.authorVan Asten, P.
dc.contributor.authorVan't Zelfde, J.A.
dc.contributor.authorVan der Zee, A.
dc.contributor.authorHammecker, C.
dc.date.accessioned2019-12-04T11:36:27Z
dc.date.available2019-12-04T11:36:27Z
dc.date.issued2004
dc.identifier.citationVan Asten, P., Van't Zelfde, J.A., Van der Zee, A. & Hammecker, C. (2004). The effect of irrigated rice cropping on the alkalinity of two alkaline rice soils in the Sahel. Geoderma, 119(3-4), 233-247.
dc.identifier.issn0016-7061
dc.identifier.urihttps://hdl.handle.net/20.500.12478/6247
dc.description.abstractIrrigated rice cropping is practiced to reclaim alkaline-sodic soils in many parts of the world. This practice is in apparent contrast with earlier studies in the Sahel, which suggests that irrigated rice cropping may lead to the formation of alkaline-sodic soils. Soil column experiments were done with some of Sahel's most alkaline-sodic rice soils from the Office du Niger (Mali) and Foum Gleita (Mauritania). Soils were irrigated using non-saline carbonate-rich irrigation water typical for the Sahel and percolation was maintained at 3–4 mm day−1. After one cropping season, soils had turned from sodic to non-sodic, and pH had dramatically decreased, most notably in the upper soil layers. The changes were most important in the Office du Niger soil due to its small buffering capacity (small CEC and CaCO3). Alkalinity consumed by above-ground matter of the rice plants (grain and straw) equaled or exceeded alkalinity added via irrigation in a zero percolation scenario. Hence, for a climate and irrigation water that are typical for the Sahel, removal of straw and grain prevents or substantially reduces further alkalinization of the soils if percolation is absent. However, in case of some percolation, straw can best be incorporated in the topsoil of calcareous soils as it accelerates de-alkalinization and de-sodication through increased dissolution of calcite. No evidence was found indicating that ferrolysis altered the short-term alkalinity balance of the studied soils to any extent. Our results are in line with recent field studies and suggest a de-alkalinization of sodic-alkaline flooded (rice) soils in the Sahel.
dc.language.isoen
dc.subjectAlkalinization
dc.subjectSodic Soils
dc.subjectIrrigated Rice
dc.subjectSahel
dc.subjectStraw
dc.titleThe effect of irrigated rice cropping on the alkalinity of alkaline soils in West Africa
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationWest Africa Rice Development Association
cg.contributor.affiliationWageningen University and Research Centre
cg.contributor.affiliationInstitut de Recherche pour le Développement, Senegal
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNiger
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectSoil Fertility
cg.iitasubjectSoil Health
cg.iitasubjectSoil Surveys And Mapping
cg.accessibilitystatusLimited Access
local.dspaceid107529
cg.identifier.doihttps://doi.org/10.1016/j.geoderma.2003.08.002


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