Ageing processes and soil microbial community effects on the biodegradation of soil C-13-2,4-D nonextractable residues

Abstract : The biodegradation of nonextractable residues (NER) of pesticides in soil is still poorly understood. The aim of this study was to evaluate the influence of NER ageing and fresh soil addition on the microbial communities responsible for their mineralisation. Soil containing either 15 or 90-day-old NER of C-13-2,4-D (NER15 and NER90, respectively) was incubated for 90 days with or without fresh soil. The addition of fresh soil had no effect on the mineralisation of NER90 or of SOM, but increased the extent and rate of NER15 mineralisation. The analyses of C-13-enriched FAME (fatty acids methyl esters) profiles showed that the fresh soil amendment only influenced the amount and structure of microbial populations responsible for the biodegradation of NER15. By coupling biological and chemical analyses, we gained some insight into the nature and the biodegradability of pesticide NER.
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Environmental Pollution, Elsevier, 2009, 157, pp.2985-2993
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Contributeur : Naoise Nunan <>
Soumis le : mardi 10 novembre 2009 - 10:09:38
Dernière modification le : mardi 24 avril 2018 - 17:20:12

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  • HAL Id : bioemco-00430838, version 1

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Thomas Z. Lerch, Marie-France Dignac, Naoise Nunan, Enrique Barriuso, André Mariotti. Ageing processes and soil microbial community effects on the biodegradation of soil C-13-2,4-D nonextractable residues. Environmental Pollution, Elsevier, 2009, 157, pp.2985-2993. 〈bioemco-00430838〉

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