Abstract: Radial oxygen loss (ROL) is one of the most important mechanisms for rice to obtain nutrients from soil when living in waterlogging environment, being quite important for rice growth and development. Recently, ROL has been demonstrated to significantly affect the population and diversity of soil microbes, including anaerobic bacteria, aerobic bacteria and facultative anaerobic bacteria. Meanwhile, numerous studies have reported that rice ROL plays roles in the mineralization process of soil organic nitrogen. However, the internal interactions between the mineralization of soil organic nitrogen and soil microbial dynamics at rice rhizosphere regulated by ROL have been largely ignored. In this review, we summarized the ROL traits of rice root, as well as the effects of ROL on soil microbes and organic nitrogen mineralization. We then discussed the synergistic effects of soil organic nitrogen and soil microbial dynamics on rice nitrogen absorption and metabolism. Finally, we outlined the problems and the prospects of rice ROL for further research.

Key words: slope., SEBAL model, elevation, light utility efficiency model, net primary productivity