高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (7): 768.

• 研究简报 • 上一篇    下一篇

土壤胡敏酸的13C核磁共振研究

窦森1, 华士英2, 朱涛2   

  1. 1. 吉林农业大学土壤化学系;
    2. 吉林大学理论化学研究所
  • 收稿日期:1988-09-26 出版日期:1990-07-24 发布日期:1990-07-24
  • 通讯作者: 华士英

13C NMR Studies of Humic Acids from Soils

Dou Sen1, Hua Shiying2, Zhu Tao2   

  1. 1. Department of Soil Science and Agricultural Chemistry, Jilin Agricultural University, Changchun;
    2. Institute of Theoretical Chemistry, Jilin University, Changchun
  • Received:1988-09-26 Online:1990-07-24 Published:1990-07-24

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摘要： 胡敏酸(HA)是土壤有机质的重要组分,其结构性质与土壤形成和肥力特性有密切关系,长期以来一直是土壤化学研究的难点和重点之一。

关键词: 土壤, 胡敏酸, 芳香度

Abstract: The 13C NMR spectra were measured for humic acids from several cultivated soil (black, brown forest, meadow and paddy soil) in the Northeast of China. Acomparison between humic acids from peat and those from pig manure was also made. The results show that humic acids of soils mainly consist of four types of carbon: corbonyl, aromatical, alkoxy and polymethylene. Their aromaticity is less than 40%. There are some differences among various humic acids from different soils. Humic acids from peat and pig manure are characterized by lower molecular weight and lower degree of oxidation compared with soil humic acids. The aromaticity of the humic acid from peat is much higher than that from pig manure. The results also show that the 13C NMR spectrometry can be considered as one. of the most effective methods for investigating the structural characterization of humic substances.

Key words: Soil, Humic acid, Aromaticity

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