title: Major controlling factors and predictions for cadmium transfer from the soil into spinach plants.
abstract: Predicting the mobility, bioavailability and transfer of cadmium (Cd) in the soil-plant system is of great importance with regards to food safety and environmental management. In this study, the transfer characteristics of Cd (exogenous salts) from a wide range of Chinese soils to spinach (Spinacia oleracea L.) were investigated. The major controlling factors and prediction equations for Cd transfer in the soil-plant system were also investigated. The results showed that plant Cd concentration was positively correlated with soil Cd concentration. The maximum transfer factor (ratio of the Cd concentration in the plant to that in the soil) was found in acid soils. The extended Freundlich-type function was able to describe the Cd transfer from soil to spinach plants. Combining soil total Cd, pH and organic carbon (OC) content in the prediction equation greatly improved the correlation performance compared with predictions based on total Cd only. A slight protection effect of OC on Cd uptake was observed at low soil Cd concentrations. The results are a useful tool that can be used to predict Cd transfer from soil to plant.
authors: National Soil Fertility and Fertilizer Effects Long-term Monitoring Network/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
authors: Zhenfei
authors: Z
authors: Liang
authors: Qiong
authors: Q
authors: Ding
authors: Dongpu
authors: D
authors: Wei
authors: Jumei
authors: J
authors: Li
authors: Shibao
authors: S
authors: Chen
authors: Yibing
authors: Y
authors: Ma
mesh_terms: D000383:Agriculture; D002104:Cadmium / Q000032:analysis* / Q000378:metabolism; D005506:Food Contamination / Q000032:analysis; D018570:Risk Assessment; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis* / Q000378:metabolism; D018724:Spinacia oleracea / Q000737:chemistry* / Q000378:metabolism
chemical_list: D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium