一、石灰性母质中的粘粒移动碳酸盐淋溶是土壤粘粒以淋溶方式迁移的一个必要条件(搏尔等,1980)。像Ca~(++)和Mg~(++)等二价阳离子具有强烈的凝聚作用,可抑制粘粒的淋溶。在湿润环境中,碳酸盐最终要被淋洗掉,当活性碳酸盐和交换性Ca~(++)淋洗到一定程度时,粘粒就不再以凝聚状态存在而开始移动,此时,碳酸盐和Ca~(++)的含量即可看作一种临界阈值。因为外界可变因素 1. The movement of clay in calcified parent material Carbonate leaching is a necessary condition for the leaching of soil clay (Le et al., 1980). Like divalent cations such as Ca ~ (++) and Mg ~ (++), they have a strong cohesion and inhibit the leaching of cosmids. In a humid environment, the carbonate is eventually eluted. When activated carbonate and exchangeable Ca ~ (++) are eluted to a certain extent, the clay begins to migrate no longer in the condensed state , The content of carbonate and Ca ~ (++) can be regarded as a critical threshold. Because of external variables