四川农业大学学报 ›› 0, Vol. ›› Issue (): 151-156.doi: 10.16036/j.issn.1000-2650.1984.02.008

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四川紫色土和黄壤中铬和砷两种元素背景值的判定

刘守恒, 王泽洲   

  1. 四川农学院农化系
  • 收稿日期:1984-08-14 出版日期:1984-06-30

BACKGROUND VALUESOF Cr AND As IN SICHUAN AGRICULTURAL PURPLISH SOILS AND YELLOW EARTH

Lin Shouheng, Wang Zezhou   

  1. Sichuan Agricultural College, Ya'an Sichuan, China
  • Received:1984-08-14 Online:1984-06-30

摘要: 紫色土是在紫色岩风化物上发育形成的土壤。紫色岩是侏罗纪和自垩纪时期厚度较大的湖积物,其风化特点以物理风化为主,化学风化弱,因此,风化物的性质与母岩相近。形成的土壤肥沃,富含磷、钾及微量元素,是四川省的主要农业耕作土壤。

Abstract: The data of Cr and As in the sampls of agricultural purplish soils and yellow earth assume formal distribution. Differences of Cr content were signific cant while a nhose of As were not, However, the contents of Cr and As varied in different parent materials. The different data would be arranged in the following order; shale purplish soil> sandstone purplish soil; flood deposit yellow earth> lime concretion yellow earth> old fluviogenie yellow earth. Heavier soil texture caused greater content levels of Cr aud As. The contents of Cr and As in the surface horione and sudsoil were almost in the same amounts. The variable range of background values would be expressed as x ±2δ.

Key words: SOIL, CHROMIUM, ARSENIC, SOIL CONSTITUENT