【摘要】 本文通过理论计算和田间灌溉试验，研究了矿化灌溉水和土壤系统中CaCO3、MgCO3的沉淀与溶解，离子的吸附与解吸。根据电解质溶液理论，提出判断CaCO3、MgCO3沉淀与溶解平衡的△GCaCO3、△GMgCO3的计算方法。矿化灌溉水进入土壤后，产生盐效应，提高土壤中CaCO3、MgCO3溶解度，增加土壤水溶性Ca2+、Mg2+含量。在田间条件下，明显降低作物吸附Na+的Gapon常数，减少土壤对灌溉水中Na+的吸附。更多还原

【Abstract】 Through theoretic calculation and field irrigation experiment the deposition and dissolution of CaCO3 and MgCO3 of soil and the adsorption and desorption of ions in generalized irrigation water-soil system were studied in this work. A calculating method of △GCaCO3 and △GMgCO3 for judging the deposition and dissolution equilibria of CaCO3 and MgCO3 was established according to the theory of electrolyte solution. The measured results in field experiment confirm to the theoretic calculating results of △GCaCO3 and △GMgCO3 of different itrigation water. The solubility of CaCO3 and MgCO3 of soil was increased due to salt effect of mineralized inigahon water. The soluble calcium and magnesium contents of soil increased after the soil was irrigated with generalized water. Planting reduces the K value of sodium adsorption Gapon equation and decreases the adsorption of sodium from irrigation water by soil in field condition.更多还原