Nitrogen is the largest demand for crop growth and development of mineral elements.However, excessive application of nitrogen fertilizer is in production, nitrogen use efficiencynot only led to decreased production costs, but can also cause groundwater contamination, soit is more and more brought to the attention of the people. Efficient use of breeding maizevarieties is the most economical and effective way.Based on the earlier researches,choosingmaize inbred lines in our group, we get six nitrogen accumul...