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@ARTICLE{Kasteel:11425,
author = {Kasteel, R. and Pütz, T. and Vanderborght, J. and
Vereecken, H.},
title = {{F}ate of two herbicides in zero-potential lysimeters and
in field soil},
journal = {Journal of environmental quality},
volume = {39},
issn = {0047-2425},
address = {Madison, Wis.},
publisher = {ASA [u.a.]},
reportid = {PreJuSER-11425},
pages = {1451 - 1466},
year = {2010},
note = {Record converted from VDB: 12.11.2012},
abstract = {In Germany, zero-tension lysimeters are used as parr of the
registration requirements in case pesticides pose a
potential threat to conrtaminate the groundwater However,
the water regime and the method of pesticide sampling differ
between the lysimeters and the field We monitored the
transport of the two herbicides ethidimuron [1-(5-
erhylsulfonyl-1,3,4-thiadiazol-1-2-yl)-1,3-dimethylurea]
(ETD) and methabenzthiazuron
[1-benzothiazol-2-yl-1,3-dimethyl-urea] (MBT) and their main
metabolite, accompanied with bromide as conservative tracer,
in zero-tension lysimeters filled with undisturbed soil and
in the field The herbicides were applied as a short pulse to
the bare soil surface Herbicide concentrations were analyzed
in the drainage water of the 1 2-m-deep lysimeters and from
soil cores taken from the field during six campaigns Soil
coring in the field emphasized matrix flow and allowed us to
estimate the field-based dissipation and sorption parameters
Based on mass recovery calculations, the field fine was 870
d for ETD compared with 389 d for its main metabolite The
initially fast field-based dissipation of MBT with a
half-life value of approximately 1 mo was followed by a much
slower dissipation The retardation factor was estimated from
the concentration profiles by Inversely solving the
convection dispersion equation and yielded 18 2 +/- 1.3 for
ETD and 36 9 +/- 17 5 for MBT For the lysimeters, a leaching
period of 2 1/2 yr was too short to monitor bulk herbicide
mass through the sod matrix Only $1.7\%$ of the applied EDT
and 1 $4\%$ of the applied MBT were sampled in the drainage
water at 1.2 m depth. Despite contrasting sorption and
dissipation properties. both herbicides appeared fast and at
the same time in the drainage water, hinting at preferential
flow phenomena. Compared with field fare of herbicides
measured by soil coring, zero-potential lysimeters emphasize
the transport of small amounts of herbicides triggered by
preferential flow events.},
keywords = {J (WoSType)},
cin = {ICG-4 / JARA-ENERGY / JARA-HPC},
ddc = {333.7},
cid = {I:(DE-Juel1)VDB793 / $I:(DE-82)080011_20140620$ /
$I:(DE-82)080012_20140620$},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Environmental Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000279514200034},
doi = {10.2134/jeq2009.0236},
url = {https://juser.fz-juelich.de/record/11425},
}