Soil thresholds and a decision tool to manage food safety of crops grown in chlordecone polluted soil in the French West Indies.

摘要: Due to the persistent pollution of soils by an organochlorine, chlordecone (CLD also known as Kepone ©) in French West Indies, some crops may be contaminated beyond European regulatory threshold, maximum residue limit (MRL). Farmers need able foresee risk not complying with threshold each field and for crop, if not, farmers whose fields are would have stop cultivating certain concerned. To help make right choices, we studied relationship between contamination soil crops. We showed that a crop CLD depended on concerned, content type soil. grouped products three categories: (i) non-uptakers low-uptakers, (ii) medium-uptakers, (iii) high-uptakers, according their level resulting exceeding MRL. Using simulation model, computed required ensure MRL was sufficiently low product type. Threshold values ranged from 0.02 μgkg-1 dasheen grown nitisol 1.7 μgkg-1 yam andosol high-uptake category, 1 μgkg-1 lettuce 45 μgkg-1 leaves spring onions medium-uptake category. Contamination low-uptakers did depend contamination. With these results, built easy-to-use decision support tool based two thresholds (0.1 1 μgkg-1) enable growers adapt cropping system hence continue farming.