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Guang Pu Xue Yu Guang Pu Fen Xi. 2013 Nov;33(11):3092-7.

[Active crop canopy sensor-based nitrogen diagnosis for potato].

[Article in Chinese]

Author information

1
College of Agronomy, Inner Mongolia Agricultural University, Huhhot 010019, China. jingyuhappyday@163.com
2
College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Huhhot 010019, China.
3
College of Agronomy, Inner Mongolia Agricultural University, Huhhot 010019, China.

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.

PMID:
24555388
[Indexed for MEDLINE]
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