关键词: 硒, 生态地球化学, 分布特征, 来源

Abstract: Selenium (Se) is one of the important life elements which are beneficial for the animals, plants and human health. In this paper, a research approach of multi-purposes regional eco-geochemistry was introduced. Combined with previous studies, the distribution characteristics of soil Se levels were systematically analyzed. The results showed that the average Se concentration of soil in the main farming area of China was 0.217 mg/kg, while the higher concentrations distributed around Central and South China. The distributions of Se-rich soil were dominated by factors such as coal-related stratum, black shale, soil organic matters, sedimentation and parent rocks.

Key words: selenium, eco-geochemistry, distribution characteristics, origin