根据蓬莱镇组(J_3p)、遂宁组(J_3s),城墙岩群(K_1cg)沙溪庙组 (J_2s)四种紫色岩形成土壤的棉花生产现状、母岩特征、营养基础等问题,初步探索了四川植棉土壤的肥力特性背景.结果表明,多年平均产量以蓬莱镇组紫色土最高,其次为城墙岩群、遂宁组、沙溪庙组紫色土,棉花质量差异也具同一趋势.棉花的产量、品质差异与四种母岩特性、矿质元素的有效含量关系较大. According to the cotton production status, characteristics of mother rocks and nutrition foundation of four purple rock formations, such as Penglaizhen Formation (J_3p), Suining Formation (J_3s) and J_2s Sandstone Group (J_2s) The fertility characteristics of cotton-growing soils in Sichuan Province were studied.The results showed that for many years, the average yield of purple soil was the highest in Penglaizhen Formation, followed by the wall-rock group, the purple soil in Suining Formation and Shaximiao Formation, and the same trend in cotton quality , Quality differences and the four characteristics of the mother rock, mineral elements of the effective content of a larger relationship.