Volume 49, Issue 1 pp. 65-75
Research Article
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Influence of Compost Addition to Soil on the Behaviour of Herbicides

Enrique Barriuso

Corresponding Author

Enrique Barriuso

Unité de Science du Sol, I.N.R.A., 78850 Thiverval-Grignon, France

Unité de Science du Sol, I.N.R.A., 78850 Thiverval-Grignon, FranceSearch for more papers by this author
Sabine Houot

Sabine Houot

Unité de Science du Sol, I.N.R.A., 78850 Thiverval-Grignon, France

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Claire Serra-Wittling

Claire Serra-Wittling

Unité de Science du Sol, I.N.R.A., 78850 Thiverval-Grignon, France

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Abstract

The transformations of eight herbicides (atrazine, simazine, terbutryn, pendimethalin, carbetamide, 2,4-D, metsulfuron-methyl and dimefuron) in soil after compost addition were monitored during long-term laboratory incubations. The herbicides were applied to soil, compost and soil-compost mixtures. Herbicide sorption, their kinetics of mineralisation and the extractability of residues were compared in the different treatments. Compost addition to soil generally decreased herbicide mineralisation and favoured the stabilisation of herbicide residues. A fraction of the stabilised residues remained extractable and potentially available. However, most of them were unextractable and formed bound residues. Sorption could be at the origin of a kinetically limited biodegradation, mainly for the most highly-sorbed herbicides (atrazine, simazine, terbutryn, pendimethalin and dimefuron). Compost addition had little effects on the less sorbed herbicides (carbetamide, 2,4-D and metsulfuron- methyl). © 1997 SCI.

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