Monosaccharide composition of four humus fractions in an Andosol and a Cambisol

  1. Kazuhito ITOH1,
  2. Akira WATANABE2,
  3. Kiyoshi TSUTSUKI3,
  4. Shozo KUWATSUKA2,†

Article first published online: 11 JAN 2007

DOI: 10.1111/j.1747-0765.2007.00111.x

Issue

Soil Science & Plant Nutrition

Soil Science & Plant Nutrition

Volume 53, Issue 1, pages 7–11, February 2007

Additional Information

How to Cite

ITOH, K., WATANABE, A., TSUTSUKI, K. and KUWATSUKA, S. (2007), Monosaccharide composition of four humus fractions in an Andosol and a Cambisol. Soil Science & Plant Nutrition, 53: 7–11. doi: 10.1111/j.1747-0765.2007.00111.x

Author Information

  1. 1

    Faculty of Life and Environmental Science, Shimane University, Shimane 690-8504,

  2. 2

    Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, and

  3. 3

    Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan

  1. †

    Professor Emeritus.

* : A. WATANABE, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan. E-mail: akiraw@agr.nagoya-u.ac.jp

Publication History

  1. Issue published online: 11 JAN 2007
  2. Article first published online: 11 JAN 2007
  3. Received 6 December 2004. Accepted for publication 23 August 2006.

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Keywords:

  • fulvic acid;
  • humic acid;
  • humin;
  • monosaccharide composition;
  • soil saccharide

Abstract

The composition of seven neutral monosaccharides (glucose, galactose, mannose, xylose, arabinose, fucose and rhamnose) released by acid hydrolysis with 0.5 mol L−1 H2SO4 was compared among four humus fractions, including humic acids (HAs), fulvic acids (FAs), water-soluble non-humic substances (WS-NHS; XAD-8-non-adsorbed fraction of the FA fraction) and humin, for two representative types of Japanese soils, an Umbric Andosol (ando soil) and a Dystric Cambisol (brown forest soil). Although more than 58% of the hexoses and pentoses in the soil were recovered in humin, 29–57% of fucose and rhamnose were found in WS-NHS. In the principal component analysis, humin was separated from the other three fractions because of larger proportions of glucose and xylose and smaller proportions of fucose and rhamnose. The HAs contained a larger proportion of arabinose than the other fractions. The monosaccharide composition of the FAs and WS-NHS was similar in each soil type. As deoxyhexoses and pentoses in soil are known to originate mainly from microorganisms and higher plants, respectively, the contribution of microorganism-derived saccharides to total neutral saccharides was considered to be greater in the order of WS-NHS and FAs > HAs > humin.

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