title: [Active crop canopy sensor-based nitrogen diagnosis for potato].
abstract: In the present study, two potato experiments involving different N rates in 2011 were conducted in Wuchuan County and Linxi County, Inner Mongolia. Normalized difference vegetation index (NDVI) was collected by an active GreenSeeker crop canopy sensor to estimate N status of potato. The results show that the NDVI readings were poorly correlated with N nutrient indicators of potato at vegetative Growth stage due to the influence of soil background. With the advance of growth stages, NDVI values were exponentially related to plant N uptake (R2 = 0.665) before tuber bulking stage and were linearly related to plant N concentration (R2 = 0.699) when plant fully covered soil. In conclusion, GreenSeeker active crop sensor is a promising tool to estimate N status for potato plants. The findings from this study may be useful for developing N recommendation method based on active crop canopy sensor.
authors.affiliation: College of Agronomy, Inner Mongolia Agricultural University, Huhhot 010019, China. jingyuhappyday@163.com
authors.forename: Jing
authors.initials: J
authors.lastname: Yu
authors.affiliation: College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Huhhot 010019, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Li
authors.affiliation: College of Agronomy, Inner Mongolia Agricultural University, Huhhot 010019, China.
authors.forename: Yong-Lin
authors.initials: YL
authors.lastname: Qin
authors.affiliation: College of Agronomy, Inner Mongolia Agricultural University, Huhhot 010019, China.
authors.forename: Ming-Shou
authors.initials: MS
authors.lastname: Fan
mesh_terms: D002681:China; D009584:Nitrogen / Q000032:analysis*; D012987:Soil / Q000737:chemistry; D011198:Solanum tuberosum / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: D012987:Soil; D009584:Nitrogen