Soluble Potassium Transport and Concentration Change in Reclaimed Soil Filled with Fly Ash
The early transport characteristics and long-term concentration tendency of soil soluble potassi-um were studied in reclaimed soil profiles filled with fly ash, based on soil column experiment and HYDRUS-1D program. The results showed that the vast majority of soluble potassium in reclaimed soil could rapidly transport together with moisture infiltration to the underlying soil layers or groundwater with-in 10 days if there was field irrigation or heavy rainfall in the beginning of the reclamation,soil potassium loss was serious,and high enrichment potassium in fly ash could not be utilized for plants. Groundwater ta-ble in the reclamation soil profiles had a major impact on long-term process of soluble potassium concen-tration. Potassium concentration in the soil solution would increase under the condition of high groundwater table( -115 cm ) , little precipitation and much evaporation. At the same time, the plants could better make use of potassium nutrient,but the contamination risk of coversoil from salinity and heavy metals also increased correspondingly.
fly ashreclaimed soilsoluble potassiumsoil column experimentHYDRUS-1 D
国家科技期刊平台
NSTL
万方数据
维普
