地理研究

地理研究 ›› 1990, Vol. 9 ›› Issue (4): 17-25.doi: 10.11821/yj1990040005

• 论文 • 上一篇    下一篇

我国土壤中结合态硒的含量和分布规律

侯少范, 李德珠, 王丽珍, 王五一, 谭见安   

  1. 中国科学院、国家计划委员会地理研究所
  • 收稿日期:1989-09-20 修回日期:1990-01-20 出版日期:1990-12-15 发布日期:1990-12-15

A STUDY ON ASSOCIATION FORMS OF SELENIUM IN CHINESE SOILS

Hou Shaofan, Li Dezhu, Wang Lizhen, Wang Wuyi, Tan Jianan   

  1. Institute of Geography; Chinese Academy of Sciences and State Planning Commission of the People's Republic of China
  • Received:1989-09-20 Revised:1990-01-20 Online:1990-12-15 Published:1990-12-15

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150 | 15

摘要： 本文提出并建立了Jackson法系统分离土壤中不同形态硒的实验程序,研究了我国几种土壤表层(0—20cm)中硒的结合形态及其地理分布规律,并对植物可利用性作了评价。

关键词: 闭蓄性硒, 土壤硒的浓度, 硒对植物的可利用性

Abstract: The experimental procedure to separate different species of soil selenium was proposed according to Jackson,Relationships between contents of 7 selenium species, distribution and availability to plants was studied in major soil in China,The results revealed that the concentration of water soluble selenium in alkaline soils are significantly higher than that in acid soils. Amount of unenveloped selenium form is correlated with total soil selenium. And amount of unavailable enveloped selenium form is interrelated with iron and aluminium in soil, which demonstrate that the unavailable enveloped selenium is mostly fixed by Fe oxides and Al oxides. The percentages of residue selenium vary slightly in different soils. The availabilities of selenium in soils in low selenium belt are similar to those in normal area. Therefore, low selenium content in plants results from low level of total soil selenium.

Key words: enveloped selenium form, selenium concentration in soil, selenium availability to plants