Abstract To provide a theoretical foundation for the management practices in the later stage, as well as to assess the quality of Camellia oleifera seed oil, we determined the heavy metal(loid) (HM) concentrations in the rock–soil–plant system of C. oleifera plantation, Ceheng County, Guizhou Province, China. There is a slight contamination of soil Cd on the C. oleifera plantation in Ceheng County, with no pollution risk for the other soil HMs. In contrast, soil Mn demonstrated pure migration from rock to soil (migration accumulation coefficient < 1), while the soil relatively accumulates As, Cd, Pb, Zn, and Cr. Camellia oleifera exhibits a strong ability to absorb and tolerate Mn, particularly in its old leaves, where concentrations reached 1580.83 mg kg −1 . Notably, the Ni concentration in C. oleifera seeds averaged 2.44 mg kg −1 , which exceeds its standard, while the other HMs are lower than their standards. Although the Cd concentration in the C. oleifera seed is safe, it is necessary to strengthen monitoring and prevent soil Cd in the study area. Therefore, there should be a monitoring of the Cd and Ni concentrations in C. oleifera seed oil within the research area.
Song et al. (Fri,) studied this question.