长效及普通碳铵在土壤中的渗透转化特性

Percolation and Transformation Characteristics of Long-effect and Ordinary Ammonium Bicarbonate in Soil

碳铵肥料施入土壤后的渗透转化特性是决定以碳铵为载体实现土壤中CO_2固定的重要基础;采用土柱淋溶模拟试验,对比研究施用长效碳铵、普通碳铵后HCO_3^-、CO_3^(2-)在土壤中的渗透转化特性,结果表明施用长效碳铵HCO_3^-、CO_3^(2-)在土壤中的含量、贮存时间以及渗透距离均明显高于相应的普通碳铵;由此可推测以长效碳铵为载体固碳性能优于普通碳铵。

The percolation and transformation characteristics of ammonium bicarbonate（ ABC） and long-effect ammonium bicarbonate（ LEABC） in soil are important for carbon sequestration by the agricultural use of ABC or LEABC. The simulative soil columns were used to research the percolation and transformation of the two fertilizers in soil. It was found that the concentration of HCO3^- and CO3^2- in soil columns was much higher and the irons percolated much deeper fertilized with LEABC than that of ABC. So the results indicate much more portions of the HCO3^- and CO3^2- released from LEABC may percolate down into the aquifer and become sequestrated underground,and LEABC is better than ABC to sequestrate CO2.