基于无人机多光谱数据和氮素空间分异的玉米冠层氮浓度估算
郝琪, 陈天陆, 王富贵, 王振, 白岚方, 王永强, 王志刚

Estimation of canopy nitrogen concentration in maize based on UAV multi- spectral data and spatial nitrogen heterogeneity
HAO Qi, CHEN Tian-Lu, WANG Fu-Gui, WANG Zhen, BAI Lan-Fang, WANG Yong-Qiang, WANG Zhi-Gang
表8 玉米不同层位叶片氮浓度与冠层氮浓度的回归精度
Table 8 Regression accuracy of leaf nitrogen concentration and canopy nitrogen concentration at different levels of maize
数据集
Data Set
评估指标
Evaluation indicator
V9 V12 R1 R3
训练集
Training set
R2 0.85 0.89 0.87 0.91
RMSE (%) 0.15 0.14 0.15 0.12
NRMSE (%) 6.27 5.98 7.67 6.84
MAE (%) 0.12 0.11 0.12 0.10
测试集
Test set
R2 0.43 0.58 0.73 0.82
RMSE (%) 0.28 0.26 0.22 0.16
NRMSE (%) 11.64 11.79 11.32 9.44
MAE (%) 0.22 0.18 0.17 0.11