Plant Diversity and Nutrient Variations in Erosion Site

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Author(s) Ezekiel, A. G., Ogbemudia, F. O. and Ubom, R. M.
Pages 469-473
Volume 4
Issue 10
Date October, 2015
Keywords Plant Diversity, Soil Erosion, Akwa Ibom, Soil Physicochemical, Variance

Plant diversity and nutrient variations in an erosion site were studied. The parameters measured included number of plant species, frequency and density in each quadrat along 3 transects identified as transect-below, middle, and above. Soil samples were collected for determination of physicochemical properties. The results showed that 14 plant species were identified in transects-below and middle; and 13 plant species in transect-above. Generally, number of plant species (diversity) was slightly higher in transect-below than other transects and most of the plant species identified were annuals with negligible height and cover. Physicochemical analyses showed that the soil pH was neutral in transect-below and middle to slightly acidic in transect-above. Total Nitrogen was very low with a mean value of 0.01 ± 0.00% in the middle transect and 0.02 ± 0.00% in transect-below and above. Available phosphorus showed increasing trend from transect-below (18.61± 2.99 mg/kg) to transect-above (21.25± 1.23mg/kg). Effective Cation Exchange Capacity was low and invariably low Exchangeable Basic Cations were obtained in the 3 transects. Iron had a greater portion in all transects among the micronutrients. Clay and silt contents were low while sand had the highest proportion in all transects. Soil texture was sandy loam. Analysis of variance performed on the soil parameters showed that they were significant at p=0.05. The results revealed that number of plant species and plant nutrients were influenced by the processes of erosion.

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