Journal article

Publication year: 2002

Pages: 183-195

Journal: Soil & Tillage Research

Volume number: 66

Issue number: 2

ISSN: 0167-1987

DOI Link: https://doi.org/10.1016/S0167-1987(02)00026-0

Publisher: Elsevier

Abstract: 
Pollutants can be introduced to soil through the application of organic
and inorganic fertilizers and pesticides and through atmospheric
depositions. The objective of this research was to evaluate the
influence of long-term (9-17 years) tillage systems on the behavior of
pollutants in soils. Bioavailability and enrichment of heavy metals,
arsenic, and organics, i.e. polychlorinated biphenyls (PCB's) and a
chlorinated phenol (2,4-DCP) were measured in a Eutric Cambisol and a
Luvisol under conventional tillage (CT), reduced tillage (RT), and
no-tillage (NT). Soil samples were collected from 0 to 3, 3 to 10, and
10 to 25cm depths.The upper layer of NT soils was enriched in
pollutants, but concentrations decreased with increasing soil depth.
Atmospheric deposition of pollutants and input via organic fertilizers
was noticeable in soils under long-term NT. Total amount of zinc (59mgkg
^{- 1} ) was significantly enriched in
the 0-3cm depth of the Luvisol under NT and this was attributed to
higher sorption capacity for heavy metal input via liquid manure. In the
Eutric Cambisol, NT resulted in significant increase of cadmium
extracted by aqua regia in the arable layer of 0-25cm. As a result of
higher soil organic C, long-term accumulation of PCB's in NT soils was
more pronounced than in plowed soils. In plowed soils the mixing effect
resulted in homogeneous distribution of pollutants within a soil depth
of 0-25cm.The enrichment of organic C in RT and NT soils emphasizes the
role of soils as a sink for pollutants, buffering the contaminants
against leaching and transfer into crops.

Harvard Citation style: Düring, R., Hoß, T. and Gäth, S. (2002) Depth distribution and bioavailability of pollutants in long-term differently tilled soils, Soil & Tillage Research, 66(2), pp. 183-195. https://doi.org/10.1016/S0167-1987(02)00026-0

APA Citation style: Düring, R., Hoß, T., & Gäth, S. (2002). Depth distribution and bioavailability of pollutants in long-term differently tilled soils. Soil & Tillage Research. 66(2), 183-195. https://doi.org/10.1016/S0167-1987(02)00026-0