Chickpea Residue Properties Controlling Decomposition Dynamics and nitrogen Availability in Some Tropical Acid Soils

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dc.contributor.authorDanga, B. O.
dc.contributor.authorHadas, A.
dc.contributor.authorWakindiki, I.
dc.contributor.authorOuma, J. P.
dc.contributor.authorBar-Tal, A.
dc.date.accessioned2015-07-09T12:43:51Z
dc.date.available2015-07-09T12:43:51Z
dc.date.issued2013
dc.descriptionResearch Articleen_US
dc.description.abstractChickpea (Cicer arietinum) grown in a rotation can contribute significant nitrogen (N) if its decomposition and nutrient-release dynamics are known and synchronised with the maximum demand by the succeeding crop. The aims of the study were to investigate the decomposition rates of two chickpea residues, mature (CHR) and green manure (GM), and use their properties to predict N dynamics in acid soils. The N dynamics were predicted by the NCSOIL model using neutral and acidic detergent fibres (NDF and ADF, respectively) measured by near-infrared reflectance spectroscopy (NIRS) for defining residue pools. The GM released 50ā€“60% of total N in 84 d, whereas CHR immobilised N. Simulations based on the two residue pools indicated that NIRS predicted the carbon (C) and N dynamics reasonably well for both residues. The decay rate constants of the NDF āˆ’ soluble pool varied between 0.5 and 0.2 dāˆ’1. Adding an intermediate pool NDF ļ€« ADF improved the prediction of C and N dynamics for CHR but not for GM. Therefore, successful prediction of N dynamics required the search of N partitioning among pools by NCSOIL, as long as no chemical analysis of N was suitable for this purpose.en_US
dc.identifier.citationSouth African Journal of Plant and Soil, 2013, 30(4): 203ā€“212en_US
dc.identifier.issn0257-1862
dc.identifier.urittp://dx.doi.org/10.1080/02571862.2013.861030
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/13139
dc.language.isoenen_US
dc.publisherTaylor & Francis; NISC (Pty) Ltden_US
dc.subjectC and N mineralisationen_US
dc.subjectDecomposition rateen_US
dc.subjectNCSOIL modelen_US
dc.subjectNear-infrared spectroscopyen_US
dc.subjectN immobilisationen_US
dc.titleChickpea Residue Properties Controlling Decomposition Dynamics and nitrogen Availability in Some Tropical Acid Soilsen_US
dc.typeArticleen_US
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