The average N accumulation quantity（Y） of every corn plant in different yield treatments increased with the days（X） of each sampling stage,which can be described with the equation of Logistic Y=K/1+e^（a-bx）,moreover the highest rate of increase and the day of emerge can be calculated from the equation.The highest rate of nutrient absorption and the total quantity of nutrient absorbed was in the high yield treatment.The rate of nutrient absorption and the total quantity of nutrient absorbed was the least in non-fertilizer treatment.The N accumulation speed in leaf and stalk of all different yield treatments showed the same fast-slow-fast pattern.The N accumulation quantity in leaf and stalk of different yield treatments showed high yield treatment ＞ midterm yield treatment ＞ non-fertilizer treatment.