关键词: 根际；非根际；重金属；铜；化学行为

Abstract:

Copper is an essential trace mineral for plants and animals, but excessive copper will seriously affect the growth of plants and animals. Recently, with the development of industry and agriculture, copper pollution in soil has become one of the important soil and environment problems. Studies on copper pollution have expanded to rhizosphere domains. Rhizosphere is a soil micro region where is significantly affected by plant root system and plant growth activities. Rhizosphere has great impact on the porphologic change and migration of heavy metal owing to its special physical, chemical and biological properties. Therefore, this paper summarized the research progress made on rhizosphere chemical behavior under the influence of rhizosphere pH and Eh, the root exudates, rhizosphere organic matter and microbial changes. And then, the future study should be further deepened either on single or multiple rhizosphere environment factors (pH, Eh, root exudates, rhizosphere organic matters, etc.) about its/their influence on the morphological changes of copper. This study provided guidance for assessing the risk of copper release in soil, and expounding the mechanism of copper contaminated soil chemistry and biological repairing mechanism as well.

Key words: rhizosphere, non\, ehizosphere, heavy metal, copper, chemical behavior