抄録
It is required to sequestrate CO2 for mitigating global warming at present. Recently, large-scale desert afforestation has been suggested as a measure of CO2 fixation. The hydraulic water coefficients, depth of soil, salt concentration of soil and water source of trees were measured at a specific site. As the results of these analyses and measurements, it was found that Eucalyptus camaldulensis has the highest carbon fixation ability of 300kg-Carbon/tree. Thus, it is necessary to predict salt and water movement for E. camaldulensis afforestation. Long-term accumulation predictions have been also reported. However, evaluation of relationship between the prediction in soils and growth year of E. camaldulensis has not been reported yet. From this viewpoint, this paper predicted the water and salt movement in soil using simulation software HYDRUS (U. S. salinity laboratory). Furthermore, long term change in salt concentrations in soil of Leonora area were also predicted using the data measured at the specific site such as hydraulic conductivity, salt concentration, depth of soil, precipitation and evaporation in many precipitation patterns. It was predicted that time of salt accumulations in soil surface without E. camaldulensis was from 50 to 90 years.
