ABSTRACT
Selenium (Se) is known as an important trace element. Enshi in Central China has abundant Se resources and is recognized as the “World Capital of Selenium,” a title given at the 14th International Symposium on Trace Elements in Man and Animals in 2011. Methods of land resource safety zoning were established based on element concentrations of the crop as a bridge and considering the crop–human dose effect and the relationship between the concentrations of crops and topsoil. Combined with previous dose-response data and models, a Se-enriched safe utilization area was planned based on the provisions of the Action Plan for Soil Pollution Control. Soil Se and cadmium were highly associated with each other in the study area. The ecological effect and the dose limit model were used to calculate the elemental limit value. The safe use area of the Se-enriched land was then zoned, which is greatly enlarged than the original Soil Ten Articles referred.
