紫色土在四川盆地分布最广,占全省总面积的28%,占耕地总面积的68.7%,是该省粮食生产基地,粮食产量约占全省总量的70%。这种土壤除种植粮食作物外,还适宜种植蔗、棉、油、桑和水果。紫色土生产潜力极大,但也存在不少问题。从三十年代以来,许多土壤学者对紫色土进行过一系列研究,一致认为紫色土肥力与母质特性关系密切。本文以底土或岩石风化碎屑(即母质,C)为基本材料,同时用表土(A)和岩石(R)作辅助样品,研究了紫色土肥力与母质特性的关系。 Purple soil is the most widely distributed in the Sichuan Basin, accounting for 28% of the total area of ​​the province and accounting for 68.7% of the total area of ​​cultivated land. It is the province’s grain production base, accounting for about 70% of the total grain output. In addition to the cultivation of food crops such as soil, but also suitable for planting cane, cotton, oil, mulberry and fruit. Purple soil has great potential for production, but there are also many problems. Since the 1930s, many soil scientists conducted a series of studies on purple soil, agreeing that purple soil fertility is closely related to the parent material. In this paper, the relationship between purple soil fertility and parent material characteristics was studied by using the topsoil or rock weathered debris (ie, parent material, C) as the basic material, with surface soil (A) and rock (R) as auxiliary samples.