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    Impact of residue characteristics on phosphorus availability in West African moist savanna soils

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    Date
    2004
    Author
    Nwoke, O.C.
    Vanlauwe, Bernard
    Diels, J.
    Sanginga, Nteranya
    Osonubi, O.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    The role of residue characteristics in enhancing the availability of P was investigated in a greenhouse study using two soils from the northern Guinea savanna (NGS) and four from the derived savanna (DS) zones of the West African moist savanna. Eight organic residues of varying C-to-P ratio were used and maize ( Zea mays) was grown for 7 weeks. The effect of the organic residues on P availability (measured as resin P and maize P accumulation) differed among the soils. On average, the increase in resin P, calculated as {[(soil+residue)?control]/(control)×100}, was between 8% (Davié, DS) and 355% (Danayamaka, NGS). Maize P accumulation was increased by ca. 11% in Davié and Niaouli (DS) soils and 600% in Danayamaka soil. The increase in maize total dry matter yield (DMY) ranged from 2% to 649%. Residues with C-to-P ratio >200 produced lower DMY than those with lower ratios. Residue organic P (Po) extractable with 0.2 N H2SO4 (acid-Po) accounted for 92% ( P =0.0001) of the variation in DMY in a step-wise regression with residue parameters as independent variables and mean DMY as the dependent variable. The residue Po extractable with 0.5 M NaHCO3 (HCO3-Po) correlated significantly with DMY in Danayamaka and Davié soils, and with P accumulation in Danayamaka soil. The relationships between the residue Po and DMY might imply that Po fractions in decomposing residues contribute to P availability. However, the suitability of using the Po content of organic residues to predict their agronomic value with respect to P nutrition needs further evaluation.
    https://dx.doi.org/10.1007/s00374-004-0731-9
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/609
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1007/s00374-004-0731-9
    Agrovoc Terms
    Soil Fertility; Savannas; Crop Residues; Quality; Phosphorus; Fertilidad Del Suelo; Sabanas; Residuos De Cosechas; Calidad; Fósforo
    Regions
    West Africa
    Journals
    Biology and Fertility of Soils
    Collections
    • Journal and Journal Articles4835
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