四川盆地紫色土矿质元素的含量与分布  

CONTENTS AND DISTRIBUTION OF MINERAL-FORMING ELEMENTS IN PURPLE SOILS FROM THE SICHUAN BASIN

作　　者：田光龙[1] 唐时嘉[1] 

机构地区：[1]中国科学院成都分院土壤研究室,成都610015

出　　处：《地球化学》1991年第1期70-78,共9页Geochimica

摘　　要：紫色土是我国的一种独特土壤类型,矿质元素的含量与分布异于间一地区地带性土壤。铝、钙、镁、钾、钠、磷和锰高于我国土壤平均值,其中铝、钙、钾、钠和镁还高于世界土壤平均值;硅、铁和钛低于我国土壤平均值。紫色土矿质元素分布受成土母岩,元素自身迁移能力和成土条件影响。镁、钾、铁、钛的迁移能力较弱,分布较均一。含量主要受成土条件影响的有钙、钠、铝、磷、锰,在土壤中变化较大。紫色土硅的含量和分布基本上取决于沉积相。四川盆地镁、钾、锰、硅的区域分异比钙、钠、铝、磷、钛、铁要小。The contents of mineral-forming elements in purple soils from the Sichuan Basin and their distributions in various regions, different kinds of soil and soil profiles have been studied in detail. The mean values of SiO2,Al2O3,Fe2O3,TiO2,K2O,Na2O,CaO,MgO, MnO2 and P2O5are 58.74%, 14.36%,5.85% ,0.76% ,2.42% , 1.04%,5.50 % ,2.01%, 0.08% and 0.132%, respectively. Changes of Mg, K, Fe and Ti in the purple soils are less remarkable than those of Ca, Na, Al, P and Mn. The amount of Si is highly dependent on the type of purple rock. The formation conditions of soils have significant influence on the distribution of Ca, Na, Al, P and Mn. The distribution of K, Mn and Si in various parts of the Sichuan Basin is more uniform than that of the others. The purple soils are characterized as being rich in K and Ca.

关 键 词：矿质元素 紫色 土 含量 四川盆地 

分 类 号：S155.25[农业科学—土壤学]