内蒙古是全国重要的马铃薯商品薯和种薯生产基地之一，马铃薯主粮化战略为内蒙古马铃薯生产的高产高效提出了新的挑战。盲目追求高产引起的氮肥过量投入已成为内蒙古马铃薯绿色发展的限制因子之一。此外，灌溉面积的增加导致以耐旱品种为主栽品种的种植结构向多元化转变。与其他品种相比，针对主栽品种的氮肥推荐模型已经建立。如若将仅主栽品种适用的氮肥推荐模型用于多个品种的氮素管理势必造成氮肥不合理施用及环境风险增加。因此，本研究以多个马铃薯品种为研究对象，以主动作物传感器GreenSeeker为诊断手段，以建立基于优化NDVI值的不同马铃薯品种的氮肥归一化推荐模型为目标，研究不同品种马铃薯的氮素需求规律，探究不同品种冠层光谱反射信息产生差异的机理，筛选可消除品种差异的优化NDVI值，建立基于优化NDVI值的不同品种氮肥推荐归一化模型，以期为马铃薯产业的绿色发展提供技术支撑。

Inner Mongolia is one of the important production bases of marketable and seed potato in China. The potato as the 4rd main grain strategy is a new challenge for the high-yield and high-efficiency for potato production in Inner Mongolia. One of the limiting factor for green development of potato in Inner Mongolia is excess nitrogen application aiming at tuber yield increase. Furthermore, the planting structure gradually changed from single drought tolerance variety which was local main cultivar to diversification by the increase irrigation area. Comparing with other varieties, the nitrogen recommendation for the main cultivar already established. If we make the nitrogen fertilizer decision for multiple cultivars by the nitrogen recommendation for the main cultivar, the unreasonable nitrogen application and environmental risk will occur. This research material and nitrogen diagnosis method is multiple potato cultivars and active crop canopy sensor - GreenSeeker, to investigate the regulation of nitrogen requirement for multiple potato cultivars, to explore the mechanism of spectral reflectance difference among multi-cultivar for potato canopy, to select the optimized NDVI which can eliminate the difference of cultivars，to establish the normalized nitrogen recommendation algorithm based on the optimized NDVI for different cultivars. Hoping to provide technical support for green development of potato production.