Ionic Mobility of Cations as Affected by Redox Status of Two Different Soil Textures
2021
Dayo-Olagbende, G.O. | Ewulo, B.S
Movement of ions within the soil plays a key role in nutrient availability as well assoil management. Various reactions in the soil contribute to soil ionic mobility andconsequently nutrient availability, one of which is the oxidation-reduction reaction. Hence,this study sets out to evaluate the effect of redox status of the soil on ionic mobility of cations.A 3x2x2 factorial experiment was set up on two different soil types (clay loam and sandy clayloam), arranged in a Randomzed complete Block design (RCBD) with three replicates. Thetreatment combination involved three levels of poultry manure (0 tha-1, 6 tha-1 and 8 tha-1),two levels of NPK 15-15-15 (0 gha-1, 200 kgha-1) and two water regimes (field capacity andwaterlogging). Twelve treatments were obtained giving rise to different redox potential.Redox potential was measured using a redox meter, electrical conductivity using aconductivity meter; Ionic mobility was calculated using the mobility equation.Results from this study show that ionic mobility was highest under highly reducedconditions, also ionic mobility was highest in sandy clay loam than clayey loam andpotassium ion has the highest mobility while magnesium has the lowest mobility. It wasconcluded that soils can be subjected to reduction process to increase the mobility of cationshence there availability to plant. However care must be taken to avoid the loss of highlymobile ions like potassium.
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