Nitrogen cycling in regional grain production and consumption and its export to the environment

Global warming, eutrophication, and acidification are serious ecological and environmental problems faced by humans. Research has shown that these problems are caused by an increase in nitrogen and carbon cycling and an increase in environmental output. Especially, the input of nitrogen into farmland is increasing year by year, and the occurrence of N2O and N-NO is rapidly increasing, which has an increasingly serious impact on the atmosphere and groundwater. Based on the current research status of nitrogen cycling, this article focuses on explaining the constituent elements of the nitrogen circulation revenue and expenditure model, how to estimate the remaining and abandoned nitrogen in farmland based on the nitrogen circulation revenue and expenditure model, and briefly explains the process and mechanism of nitrogen output to the environment causing red tide, global warming, and acidification.