关键词: 马铃薯, 品种, 归一化, 氮肥养分管理, 研究进展

Abstract: Nitrogen is a key factor restricting the formation of potato yield and quality．Under the background of variety diversification，the blind unification of nitrogen fertilization have greatly limited the development of potato yield potential．Constructing a normalized nitrogen fertilizer recommendation schemes
among different varieties is the key for carrying out rational nitrogen fertilizer management．Different potato varieties have different nitrogen use efficiencies．This paper analyzed the reasons causing differences between varieties；discussed the normalized nitrogen nutrition management schemes between varieties and advantages and disadvantages，so as to provide a possible way for optimal management of potato nitrogen fertilizer．

Key words: potato, variety, normalized, nitrogen fertilizer management, research progress