The Effects Of Arsenic Contamination On Soil Quality, Fertility And Productivity

1488 Words6 Pages
Kerosene contamination affected soil physicochemical properties such as pH, total phosphorus and microbial biomass which are important indicators for assessing soil quality, fertility and productivity. Findings show that the soil used was a loamy soil and is know to belong to the alfisol series of the USDA soil taxonomic system of classification (Ibia et al., 2002). The study shows that the higher kerosene contamination levels, significantly delayed emergence and inhibited the germination of some seeds. The poor emergence obtained at higher pollution levels of the oil treatment can be attributed to poor aeration. In addition, the inhibition of germination may be due to the absorption of the oil by the seeds, which caused them to be swollen…show more content…
The decrease in the relative growth rate of Zea Mays in this study due to kerosene oil treatment of soil shows that the oil interrupted the growth of the plant. According to Kathirvelan and Kalaiselvan (2007) the leaf surface area determines in large part the amount of carbon gained through photosynthesis and the amount of water lost through transpiration and ultimately the crop yield. Reduction in the leaf and plant height as was observed in this study implies that there would be low photosynthetic efficiency of the plant as much of the solar energy emitted by the sun would not be absorbed by plant for photosynthesis. This definitely leads to low yield of the plant with subsequent low availability of food and poor economy due to low sales of such plant’s products. Since the relative growth rate measures the efficiency of seedling (Brand, 1991), the reduction in the relative growth rate of Zea mays reported in this study imply that kerosene oil reduces the efficiency of the plant. This study also shows that Zea mays did better in the polluted soil left for six months than in the polluted soil left for three months and than the soil polluted and immediately planted on. This confirms that with time, natural biodegradation occur and the kerosene polluted environment has ability to purify itself, if and only if the source of pollutant is not intermittent. Figure 1 to 6 shows that the lower kerosene contaminated soil did better than the
Open Document