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@ARTICLE{Prata:45442,
author = {Prata, F. and Lavorenti, A. and Regitano, J. B. and
Vereecken, H. and Tornisielo, V. L. and Pelissari, A.},
title = {{G}lyphosate behavior in a rhodic oxisol under no-till and
conventional agricultural systems},
journal = {Revista brasileira de ciências do solo},
volume = {29},
issn = {0100-0683},
address = {Viçosa},
publisher = {Sociedade Brasileira de Ciência do Solo},
reportid = {PreJuSER-45442},
pages = {61 - 69},
year = {2005},
note = {Record converted from VDB: 12.11.2012},
abstract = {The behavior of glyphosate in a Rhodic Oxisol, collected
from fields under no-till and conventional management
systems in Ponta Grossa, Parana state (Brazil) was
investigated. Both agricultural systems had been in
production for 23 years. Glyphosate mineralization,
soil-bound forms, sorption and desorption kinetics,
sorption/desorption batch experiments, and soil glyphosate
phythoavailability (to Panicum maximum) were determined. The
mineralization experiment was set up in a completely
randomized design with a 2 x 2 factorial scheme (two
management systems and two C-14 radiolabelled positions in
the glyphosate), with five replicates. (CO2)-C-14 evolution
was measured in 7-day intervals during 63 days. The
glyphosate sorption kinetics was investigated in a batch
experiment, employing a glyphosate concentration of 0.84 mg
L-1. The equilibration solution was 0.01 mol L-1 CaCl2 and
the equilibration times were 0.84 10, 30, 60, 120, 240, and
360 min. Sorption/desorption of glyphosate was also
investigated using equilibrium batch experiments. Five
different concentrations of the herbicide were used for
sorption (0.42,0.84,1.68,3.36, and 6.72 mg L-1) and one
concentration for desorption. Glyphosate phytoavailability
was analyzed in a 2 x 5 factorial scheme with two management
systems and five glyphosate concentrations added to soil (0,
4.2, 8.4, 42.0, and 210.0 mu g g(-1)) in a completely
randomized design. Phytotoxicity symptoms in P. maximum were
evaluated for different periods. The soil under both
management systems showed high glyphosate sorption, which
impeded its desorption and impaired the mineralization in
the soil solution. Practically the total amount of the
applied glyphosate was quickly sorbed (over $90\%$ sorbed
within 10 min). Glyphosate bound to residues did not have
adverse effects on P. maximum growth. The mineralization of
glyphosate was faster under no-till and
aminomethylphosphonic. acid was the main glyphosate
metabolite.},
keywords = {J (WoSType)},
cin = {ICG-IV},
ddc = {630},
cid = {I:(DE-Juel1)VDB50},
pnm = {Chemie und Dynamik der Geo-Biosphäre},
pid = {G:(DE-Juel1)FUEK257},
shelfmark = {Soil Science},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000229525200007},
doi = {10.1590/S0100-06832005000100007},
url = {https://juser.fz-juelich.de/record/45442},
}