Nitrogen nutrition diagnosis of winter wheat based on the UAV remote sensing
LIU Changhua
MA Wenyu
CHEN Zhichao
WANG Chunyang
LU Junjun
YUE Xuezhi
WANG Zhe
FANG Zheng
MIAO Yuxin
Abstract：Unmanned aerial vehicles remote sensing(UAVRS) has features of real time,flexibility and low coast.It is widely used in crop growth monitoring and precision agriculture management.In order to achieve high yield and high efficiency of winter wheat,the winter wheat in Laoling of Shandong province is monitored and its nitrogen nutrition is diagnosed by using UAV carrying Tetracam Mini-MCA 6 multi-spectral camera.The results are as follows:(1)the remote sensing image data acquired by unmanned aerial vehicle (UAV)is processed and the average accuracy of the mosaic image is 99.3％;(2)the vegetation indices(VIs) can accurately estimate above-ground biomass and plant nitrogen uptake of winter wheat (R2 =0.94;R2 =0.91).For the plant N concentration,the estimation effect is weak with R2 =0.73;(3) by using the nitrogen sufficiency index (NSI) to normalized the vegetation indices(VIs),the estimation ability of NSI-VIs for the nitrogen nutritional index(NNI) is better than original VIs with R2 =0.85.by using the range of NSI-MNDI to estimate NNI is as follows:NSI-MNDI ＜ 1.006 indicates lack of nitrogen,NSI-MNDI ＞ 1.020 indicates overdose of nitrogen,1.006 ～ 1.020 indicates suitable of nitrogen.(4) the indirectly method to estimate the N nutrition index by using the estimated ABG and PNC has the highest precision and the consistency between the estimated value and the observed value is 85％.
Keywords：unmanned aerial vehicle remote sensingnitrogen nutritional indexnitrogen sufficiency indexnitrogen nutrition diagnosiswinter wheat
Publication Date：2018-05-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 45-53 )