Temporal pools of individual organic substances in soil

Eric Lichtfouse (1)

1 ASD - Agronomy for Sustainable Development

Two pools of plant-derived C31 n-alkane occurring respectively as free and humin-bound forms in the same soil have been distinguished by 13C/12C analyses. The results show that the humin-bound molecule is on the average 7 years older than the free molecule. These findings indicate that apolar organic substances can be trapped temporarily into the soil matrix by weak forces.

Mots clés: humin; n-alkane; maize; humic substances; carbon dynamics; humic acids; soil; relative dating; 13C

Domaines: Science des sols

Eric Lichtfouse. Temporal pools of individual organic substances in soil. Analusis, 1999, 27 (5), pp.442-444. ⟨hal-00262449⟩