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研究了土壤胡敏酸（Humicacid）对红壤和黄棕壤以及高岭矿和蒙脱矿粘粒分散的影响。研究结果表明：土壤HA对Na+饱和的土壤及矿物粘粒分散作用很大。用H2O2除去土壤有机质后，粘粒分散明显下降。然而，添加少量HA后，又能显著地提高粘粒的分散性。这种现象在两种土壤中，红壤表现更为突出。Na+饱和的高岭矿粘粒分散性很差，而蒙脱矿粘粒分散性很强，这与它们所带电荷量有关。但是，添加少量HA后，高岭矿粘粒分散性急剧提高，而蒙脱矿的变化却很小。试验结果进一步表明：有机质HA对土壤和矿物粘粒分散作用受矿物类型的影响。
The effects of Humicacid on red clay, yellow brown soil, kaolinite and montmorillonite clay were studied. The results show that soil HA has a great effect on the dispersion of clay and Na + in soil saturated with Na +. After removal of soil organic matter with H2O2, clay particles decreased significantly. However, the addition of a small amount of HA, but also significantly improve the dispersibility of clay. This phenomenon in two kinds of soil, red soil is more prominent. Na + saturated kaolinite clay particles are poorly dispersible, whereas montmorillonite clay particles are highly dispersible, depending on the amount of charge they carry. However, with the addition of a small amount of HA, the dispersibility of kaolinite clay dramatically increases, whereas the change of montmorillonite is small. The experimental results further show that the dispersibility of soil organic matter and clay minerals is affected by the mineral type.