Sulphur dynamics in hydromorphic soils of Anambra State, southeastern Nigeria
DOI:
https://doi.org/10.55779/ng61534Keywords:
conservation, erosion, flooding, hydrology, wetland soilAbstract
Flooding of lowland soils affects several soil reactions, particularly those influencing nutrient uptake and availability, which directly affect plant growth and yield. This study was carried out to evaluate sulphur dynamics in hydromorphic soils of Anambra State, southeastern Nigeria. Soil samples were collected at a depth of 0–20 cm from seven different locations and subjected to standard laboratory analyses. The results showed that the soils were generally high in total S, available SO₄, and SO₄–S, but low in organic carbon and Zn content, while Cu levels were comparatively high. The soils were acidic, with pH values ranging from 3.3 to 5.9. Aggregate stability was generally high, and soil texture varied from loam to clay loam and sandy loam. The different forms of sulphur exhibited significant (P < 0.05) positive relationships among themselves, whereas their correlations with other chemical properties were either positive or negative and mostly non-significant. Sand showed highly significant (P < 0.01) negative correlations with silt, clay, mean weight diameter, dispersion ratio, and water-stable aggregates. The relationships between stability indices and chemical properties were generally weak and not statistically significant. Sulphur plays an important role in the nutrition of paddy rice, and the adoption of conservation-oriented practices, including reduced chemical inputs and incorporation of crop residues instead of burning, may improve soil fertility status and sulphur dynamics in these hydromorphic soils.
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