Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 321547
Title Mean residence time of soil organic matter associated with kaolinite and smectite
Author(s) Wattel-Koekkoek, E.J.W.; Buurman, P.; Plicht, J. van der; Wattel, J.T.; Breemen, N. van
Source European Journal of Soil Science 54 (2003). - ISSN 1351-0754 - p. 269 - 278.
Department(s) Laboratory of Soil Science and Geology
International Agricultural Centre
Publication type Refereed Article in a scientific journal
Publication year 2003
Keyword(s) radiocarbon measurements - carbon - turnover - dynamics - complexes - pools - size - land - age
Abstract To gain insight into the effect of clay mineralogy on the turnover of organic matter, we analysed the C-14 activity of soil organic matter associated with clay in soils dominated by kaolinite and smectite in natural savanna systems in seven countries. Assuming that carbon inputs and outputs are in equilibrium in such soils, we took the C-14 age as mean residence time of the organic matter. We corrected the C-14 activity for the Suess effect, Bomb effect and difference between date of sampling and date of C-14 measurement. Organic matter associated with kaolinite turned over fast (360 years on average). Organic matter associated with smectite turned over relatively slowly, with an average mean residence time for the whole clay-size fraction of 1100 years. Multiple linear regression indicates that clay mineralogy is the main factor explaining differences in the mean residence time of the organic matter extracted.
There are no comments yet. You can post the first one!
Post a comment
Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.