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当前位置: 首页 > 文章 > Derivation and validation of soil total and extractable cadmium criteria for safe vegetable production 农业科学学报 (英文) 2023,22 (12)
Position: Home > Articles > Derivation and validation of soil total and extractable cadmium criteria for safe vegetable production Journal of Integrative Agriculture 2023,22 (12)

Derivation and validation of soil total and extractable cadmium criteria for safe vegetable production

作  者：
Li, Li-jun;Li, Kun;Jiang, Bao;Li, Ju-mei;Ma, Yi-bing
单  位：
Sichuan Acad Forestry, Chengdu 610081, Sichuan, Peoples R China;Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China;Beijing Municipal Res Inst Environm Protect, Natl Urban Environm Pollut Control Engn Res Ctr, Beijing 100037, Peoples R China;Macau Univ Sci & Technol, Macao Environm Res Inst, Natl Observat & Res Stn Coastal Ecol Environm Maca, Macau 999078, Peoples R China
关键词：
Cd;vegetables;soil criteria;species sensitivity distribution;soil extractable Cd criteria
摘  要：
Determining the appropriate soil cadmium (Cd) criteria for vegetable production is important for ensuring that the Cd concentrations of the vegetables meet food safety standards. The soil extractable Cd criteria for vegetable production are also essential for both food safety and environmental management, especially in areas with a high natural background level. In the present study, soil total and extractable Cd criteria were derived using the approach of species sensitivity distribution integrated with soil aging and bioavailability as affected by soil properties. A dataset of 90 vegetable species planted in different soils was compiled by screening the published in literature in five bibliographic databases using designated search strings. The empirical soil-plant transfer model was applied to normalize the bioaccumulation data. After normalization, the intra-species variability was reduced by 18.3 to 84.4%. The soil Cd concentration that would protect 95% (HC5) of the species was estimated by species sensitivity distribution curves that were fitted by the Burr III function. The soil Cd criteria derived from the added approach for risk assessment were proposed as continuous criteria based on a combination of organic carbon and pH in the soil. Criteria for total Cd and EDTA-extractable Cd in the soil ranged from 0.23 to 0.61 mg kg-1 and from 0.09 to 0.25 mg kg-1, respectively. Field experimental data were used to validate the applicability and validity of these criteria. Most of the predicted HC5 values in the field experimental sites were below the 1:1 line. These results provide a scientific basis for soil Cd criteria for vegetable production that will ensure food safety.

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