Active Crop Canopy Sensor-Based Nitrogen Diagnosis for Potato

作者：Yu Jing; Li Fei; Qin Yong lin; Fan Ming shou^*

来源：Spectroscopy and Spectral Analysis, 2013, 33(11): 3098-3103.

DOI：10.3964/j.issn.1000-0593(2013)11-3092-06

• Potato
• Nitrogen diagnosis
• Plant N concentration
• Plant N uptake
• NDVI

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(R-2=0.665) before tuber bulking stage and were linearly related to plant N concentration(R-2=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.

• 出版日期2013-11
• 单位内蒙古农业大学