CLAY CONTENT, BULK DENSITY AND CARBON STORAGE RELATIONSHIPS IN MANGROVE AND RAINFOREST SOILS DURING

The assessment of carbon stocks in soil is a necessary step in determining an ecosystem's carbon storage potential. At the Forestry Unit of the Rivers State University Teaching and Research Farm and the Eagle Island, a field study was conducted to quantify the impacts of vegetation and seasons on soil organic carbon, organic carbon stock, and other physical soil properties. Seasons and vegetation had no effect on soil texture, but they did have an impact on other soil attributes. In Mangrove soils during the peak of the dry season, bulk density was considerably low (p0.05) at 0.64 g cm-3. In Rainforest soil, saturated hydraulic conductivity (Ksat) was fairly fast (20.88 cm h-1) and moderately slow (15.59 cm h-1) compared to Mangrove soil. During the rains, soil organic carbon (SOC) was considerably greater (p0-05) in mangrove soils, at 53 g kg-1, compared to 16 g kg-1 in Rainforest soils. During the same season, the soil organic carbon stock (SOCS) in Rainforest soils was 65.4 kg m-2 (p0.05), compared to 8.4 kg m-2 in Mangrove soils. SOCS showed a positive relationship between bulk density (r = 0.679, p0.05) and clay content (r = 0.892, p0.01). SOCS and bulk density can be predicted using the model Y = 0.165+4.068x, and the effects of clay content on SOCS in the two soils may be predicted using the model Y = -0.246+0.361x. The Rainforest was discovered to have greater capacity for carbon storage in the soil than the Mangrove.

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