Balance and distribution of sulphur in volcanic ash-derived soils in Chile

Aguilera, M.; Mora, MD; Borie, G; Peirano P.; Zunino, H

Abstract

Sulphur distribution with an insight in S-organic fractions was studied in volcanic-ash derived soils of Chile (Typic Dystrandepts, Palehumult) by isolating each fraction and measuring S directly by instrumental elemental analysis. S-pattern followed closely C and N distribution in these soils. Light organic-S forms accounted for more than 40% of total S in soil, indicating that this S-form is the actual vehicle through which mineralization to S-SO4 occurs. The role of this type of S-molecules, especially of those with lower molecular weight, needs to be clarified regarding its direct availability for plant roots. In younger Andisol soils, the main fraction of organic S was linked to high molecular weight humins (20-34%). In Ultisol soil, apparently a final degradation step occurs where organic soluble-S has almost disappeared and S is nearly exclusively represented by S in humic acid (HA), fulvic acid (FA) and humin (H). © 2002 Elsevier Science Ltd. All rights reserved.

Más información

Título según WOS: Balance and distribution of sulphur in volcanic ash-derived soils in Chile
Título según SCOPUS: Balance and distribution of sulphur in volcanic ash-derived soils in Chile
Título de la Revista: SOIL BIOLOGY & BIOCHEMISTRY
Volumen: 34
Número: 9
Editorial: PERGAMON-ELSEVIER SCIENCE LTD
Fecha de publicación: 2002
Página de inicio: 1355
Página final: 1361
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S0038071702000809
DOI:

10.1016/S0038-0717(02)00080-9

Notas: ISI, SCOPUS