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四川盆南紫色土颗粒深受母质的影响,红棕紫泥和灰棕紫泥具有适宜的颗粒组成。紫色土粘粒矿物以伊利石为主,其中的一部份是在土壤形成过程中形成的。红紫泥具有明显的富铁铝化过程。
The purple soil particles in the basin are deeply influenced by the parent material, and the reddish purple and grayish purple purples have the suitable particle composition. Purple soil clay minerals are mainly illite, some of which are formed during soil formation. Red purple purplish red with a clear iron and aluminum process.