Effect of Rhizosphere Dissolved Oxygen on Nitrogen Utilization of Rice

Low rhizosphere dissolved oxygen in waterlogged paddy,leads to a series of changes in soil physical and chemical properties and soil microbial community structure,directly or indirectly affecting the nitrogen cycling and utilizing process,including nitrification,de-nitrification,mineralization,as well as the ratio of nitrogen forms in soil(NH4+-N and NO3--N).This circumstance is unfavorable to N absorption and utilization.This review summarized the progresses in research at home and abroad from three aspects such as absorption and utilization of different forms of nitrogen,the effect of rhizosphere dissolved oxygen on nitrogen absorption and metabolism in rice.Also,by considering the results of research on rice nitrogen oxygen interaction mechanism of our team in recent years,the future research was discussed.