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Alley cropping in the moist savanna of West Africa III. Soil organic matter fractionation and soil productivity

dc.contributor.authorVanlauwe, Bernard
dc.contributor.authorAman, S.
dc.contributor.authorAihou, K.
dc.contributor.authorTossah, B.K.
dc.contributor.authorAdebiyi, V.
dc.contributor.authorSanginga, N.
dc.contributor.authorLyasse, O.
dc.contributor.authorDiels, J.
dc.contributor.authorMerckx, R.
dc.date.accessioned2019-12-04T11:23:38Z
dc.date.available2019-12-04T11:23:38Z
dc.date.issued1999
dc.identifier.citationVanlauwe, B., Aman, S., Aihou, K., Tossah, B. K., Adebiyi, V., Sanginga, N., ... & Merckx, R. (1998). Alley cropping in the moist savanna of West-Africa: III. Soil organic matter fractionation and soil productivity. Agroforestry Systems, 42(3), 245-264.
dc.identifier.issn0167-4366
dc.identifier.urihttps://hdl.handle.net/20.500.12478/4076
dc.description.abstractIn cropping systems with limited amounts of external inputs, the soil organic matter pool (SOM) may contribute significantly to plant nutrition. The impact of organic inputs on total SOM and particulate organic matter (POM) N contents as affected by soil type and the relationships between sources of N and maize N uptake were assessed for a set of alley cropping trials in the West- African moist savanna. The trials were established in Niaouli (Bénin Republic), in Glidji, Amoutchou, and Sarakawa (Togo), and in Bouaké and Ferkessédougou (Côte d‘ Ivoire). The total soil N content, averaged over all treatments and years, varied between 324 and 1140 mg N kg−1 soil. The POM-N content varied between 50 and 160 mg N kg−1 soil. The average proportion of soil N belonging to the POM pool ranged between 9% and 29%. This was significantly related to the annual N inputs from maize stover and prunings, when averaged over the different alley cropping treatments. The trial ‘age‘ also appeared to be related to the impact of the different treatments on the POM-N content. The Ferkessédougou soil contained a relatively higher proportion of total soil N in the POM pool because of its relatively high silt and clay content, compared to the other sites. The relative change in POM-N content between 1996 and the initial sampling was about twice the relative change in total soil N content. This suggests that N incorporated in the POM is relatively labile, compared to N incorporated in the other SOM fractions. Maize N uptake was related to the amount of add pruning-N (partial r2 of 27%), the rainfall during the growing season (partial r2 of 17%), the POM-N content (partial r2 of 14%), and to a lesser degree to the POM N concentration (partial r2 of 5%), the fertilizer N addition rate (partial r2 of 3%), and the silt and clay content of the soil (partial r2 of 3%). The POM-N content was shown to be influenced by organic matter additions and soil characteristics and to contribute significantly to maize N supply. This pool may be an important indicator for the soil fertility status of savanna soils.
dc.description.sponsorshipDirectorate-General for Development Cooperation and Humanitarian Aid, Belgium
dc.language.isoen
dc.subjectAlbie Lebbeck
dc.subjectGliricidia Sepium
dc.subjectLeucaena Leucocephala
dc.subjectSoil Organic Matter
dc.subjectParticle Size
dc.subjectSenna Siamea
dc.subjectCropping Systems
dc.subjectAlley Cropping
dc.titleAlley cropping in the moist savanna of West Africa III. Soil organic matter fractionation and soil productivity
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationInstitut des Savannes, Côte d'Ivoire
cg.contributor.affiliationInstitut National des Recherches Agricoles du Bénin
cg.contributor.affiliationInstitut National des Sols, Togo
cg.contributor.affiliationLaboratory for Soil Fertility and Soil Biology, Belgium
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryBenin
cg.coverage.countryCote D'Ivoire
cg.coverage.countryTogo
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectSoil Information
cg.iitasubjectClimate Change
cg.iitasubjectCrop Systems
cg.accessibilitystatusLimited Access
local.dspaceid99362


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