Compost addition to polluted soils to ensure fruit and vegetable safety

Lesueur Jannoyer Magalie, Clostre Florence, Fernandes Paula, Woignier Thierry. 2015. Compost addition to polluted soils to ensure fruit and vegetable safety. In : XXIX IHC - Proceedings of the XVII International Symposium on Horticultural Economics and Management and V International Symposium on Improving the Performance of Supply Chains in the Transitional Economies. Batt Peter J. (ed.). ISHS. Louvain : ISHS, 189-195. (Acta Horticulturae, 1103) International Horticultural Congress. 29, Brisbane, Australie, 17 Août 2014/22 Août 2014.

Matériel d'accompagnement : 1 diaporama (17 vues)

Note générale : A l'occasion de ce congrès, s'est également déroulé le XVII International Symposium on Horticultural Economics and Management and V International Symposium on Improving the Performance of supply Chains in the Transitional Economies, Brisbane, Australie, du 17 au 22 août 2014

Résumé : Pollution affects food safety, environmental quality and human health. ln the case of persistent soil pollution such as chlordecone in the French West Indies, horticultural crops can be so polluted as to exceed maximum residue limits. Generally, there is no remediation solution for these polluted soils. Interactions between organic matter and pesticides are known to help reduce the bioavailability of pesticides in soils. Sequestering pesticides in soils by adding compost could be an alternative way of reducing their diffusion into food chains. We added 5% organic matter to the soil upper layer in horticultural fields and pots. The soil to crop transfer for radish, lettuce and cucumber decreased from 33 to 75% according to the crop and the soil type. We demonstrated that sequestration depended on the soil type and the clay physical properties. In nitisols, chlordecone sequestration was mainly due to chemical interactions with the compost particles whereas in andosols, it was partly due to the physical impact of the added compost (allophane collapse). Increasing soil organic matter content reduces pesticide mobility in the soil and hence its bioavailability for plants. Adding organic amendments to soils is a promising way to reduce the risk of pesticide contamination of food and thus decrease human exposure to potentially harmful chemicals.

Classification Agris : P02 - Pollution
H02 - Pesticides
F04 - Fertilisation
P36 - Érosion, conservation et récupération des sols

Auteurs et affiliations

• Lesueur Jannoyer Magalie, CIRAD-PERSYST-UPR HortSys (MTQ)
• Clostre Florence, PRAM (MTQ)
• Fernandes Paula, CIRAD-PERSYST-UPR HortSys (MTQ) ORCID: 0000-0001-7668-8700
• Woignier Thierry, IMBE (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/575845/)

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