Abstract:

The interaction and mechanism of selenium and heavy metals in the rhizosphere environment were summarized, the main forms and influencing factors of selenium and heavy metals in the rhizosphere were clarified, and the effects of the rhizosphere environment on the selenium and heavy metals were discussed. Direct interaction between selenium and heavy metals and indirect interaction between them through environmental factors such as iron plaque, soil solid phase, Eh, pH, rhizosphere microorganism, and root exudates were described in detail, and the physical and chemical factors of soil causing the change of morphological transformation and content of selenium and heavy metals in the rhizosphere were analyzed. On this basis, it is pointed out that the research on the interaction between selenium and heavy metals in soil should focus on the rhizosphere environment, and the role of root exudates and rhizosphere microbial community structure characteristics in the interaction between selenium and heavy metals should be studied by combining techniques such as chromatography and high-throughput sequencing. At the same time, it is suggested that applying the research results of the interaction between selenium and heavy metals to the heavy metals contaminated farmland will not only expand the application of selenium in the agricultural ecological environment but also provide new methods for the green restoration of heavy metal contaminated farmland.

Key words: selenium, heavy metals, rhizosphere, soil, crop