objective of this study was to evaluate the potential use of oyster shell and biochar derived from wood wastes for the
remediation of acidified soil by acid-spilled accidents. The initial soil was spiked with 1 N H2SO4 solution to reach
the final soil pH of 3.73, as an artificial acidic soil or control in this study. Single or combination of oyster shell and
biochar was used at the rates of 2.5 and 2.0%, respectively. After 45 days incubation, the exchangeable cations in the
control soil were sharply decreased by due to nutrient leaching by acidic soil pH. For the soil amended with oyster
shell, the soil pH increased to 5.97 and the cation exchangeable capacity (CEC) also increased by 10 times greater
than the control. The CO2 emission was the highest in the soil treated with combination of oyster shell and biochar
compared to the control or other amendments. It can be explained with increasing soil microbial activity with oyster
shell and biochar. This finding speculates that the combined use of oyster shell and biochar may induce the
enhancement of soil microbial activity by their interaction. In summary, the combined use of oyster shell and biochar
could be the best in neutralizing acidic soil pH and enhancing soil microbial activity.
2-옥용식_1.pdf
