title: The influence of maize residues on the mobility and binding of benazolin: investigating physically extracted soil fractions.
abstract: The amount of non-extractable residues and the distribution of benazolin and its metabolites were evaluated three months after herbicide application (14C-labelled) in physically extracted soil fractions of topsoil layers of undisturbed soil columns with and without incorporated maize straw (14C-labelled). In addition, a variety of wet-chemical and spectroscopic methods were used to characterise the structure of organic carbon within the different soil fractions. The addition of crop residues increased the amount of dissolved organic carbon, enhanced the aromaticity of the organic carbon structure and enforced the aggregation of organomineral complexes. After incorporation of crop residues, an increase in the formation of metabolic compounds of benazolin and of non-extractable residues was detected. These results indicate that the addition of crop residues leads to a decrease in mobility and bioaccessibility of benazolin and its metabolites.
authors.affiliation: Agrosphere, ICG IV, Institute of Chemistry and Dynamics of the Geosphere, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany. f.schnitzler@fz-juelich.de
authors.forename: Frauke
authors.initials: F
authors.lastname: Schnitzler
authors.forename: Arquimedes
authors.initials: A
authors.lastname: Lavorenti
authors.forename: Anne E
authors.initials: AE
authors.lastname: Berns
authors.forename: Norbert
authors.initials: N
authors.lastname: Drewes
authors.forename: Harry
authors.initials: H
authors.lastname: Vereecken
authors.forename: Peter
authors.initials: P
authors.lastname: Burauel
mesh_terms: D004784:Environmental Monitoring / Q000379:methods; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006540:Herbicides / Q000032:analysis*; D007093:Imidazoles / Q000032:analysis* / Q000378:metabolism; D012989:Soil Pollutants / Q000032:analysis*; D003313:Zea mays / Q000378:metabolism
chemical_list: D006540:Herbicides; D007093:Imidazoles; D012989:Soil Pollutants; C010242:metizoline