Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/25141
COMPARTIR / EXPORTAR:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Título

Spatial variability in the degradation of isoproturon in soil

AutorWalker, A.; Jurado-Expósito, Montserrat CSIC ORCID ; Bending, Gary D.; Smith, V. J. R.
Palabras claveSoils
Herbicides
Isoproturon
Biodegradation
Persistence
Fecha de publicaciónmar-2001
EditorElsevier
CitaciónEnvironmental Pollution, 111: 407-415, 2001
ResumenThirty samples of soil were taken at 50-m intersections on a grid pattern over an area of 250×200 m within a single field with nominally uniform soil characteristics. Incubations of isoproturon (3-(4-isopropylphenyl)-1,1-dimethylurea) under standard conditions (15oC; −33 kPa soil water potential) indicated considerable variation in degradation rate of the herbicide, with the time to 50% loss (DT50) varying from 6.5 to 30 days. The kinetics of degradation also varied between the sub-samples of soil. In many of them, there was an exponential decline in isoproturon residues; in others, exponential loss was followed by more rapid rates of decline; in a few soil samples, rapid rates of loss began shortly after the start of the incubations. In more detailed studies with soils from a smaller number of sub-sites (20), measurements were again made of isoproturon degradation rate, and the soils were analysed for organic matter content, pH, and nutrient status (N, P, K). Measurements were also made of isoproturon adsorption by the soils and of soil microbial biomass. Patterns of microbial metabolism were assessed using 95 substrates in Biolog GN plates. Soils showing rapid biodegradation were generally of higher pH and contained more available potassium than those showing slower degradation rates. They also had a larger microbial biomass and greater microbial metabolic diversity as determined by substrate utilisation on Biolog GN plates. The implications of the results for the efficacy and environmental behaviour of isoproturon are discussed.
Descripción9 pages, 3 tables, 4 figures
Versión del editorhttp://dx.doi.org/10.1016/S0269-7491(00)00092-0
URIhttp://hdl.handle.net/10261/25141
DOI10.1016/S0269-7491(00)00092-0
ISSN0269-7491
Aparece en las colecciones: (IAS) Artículos

Mostrar el registro completo

CORE Recommender

SCOPUSTM   
Citations

147
checked on 27-mar-2024

WEB OF SCIENCETM
Citations

147
checked on 16-feb-2024

Page view(s)

290
checked on 28-mar-2024

Google ScholarTM

Check

Altmetric

Altmetric


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.