Estimation of Potato Plant Nitrogen Content Using UAV Multi-Source Sensor Information

doi:10.3964/j.issn.1000-0593(2022)10-3217-09

Journals >Spectroscopy and Spectral Analysis >Volume 42 >Issue 10 >Page 3217 > Article

Spectroscopy and Spectral Analysis
Vol. 42, Issue 10, 3217 (2022)

Estimation of Potato Plant Nitrogen Content Using UAV Multi-Source Sensor Information

DOI: 10.3964/j.issn.1000-0593(2022)10-3217-09 Cite this Article

Copy Citation Text

show less

Fig. 1. Potato field location and experiment design

Download full size | View in the Article

Fig. 2. Spectral reflectance curves of potato in tuber formation period

Download full size | View in the Article

Fig. 3. Comparative analysis of extracted plant height and measured plant height of potato

Download full size | View in the Article

Fig. 4. Comparative analysis of potato extraction coverage and measured coverage

Download full size | View in the Article

Fig. 5. Correlation analysis results of extraction parameters and plant nitrogen content at different growth stages
Note: dotted line represents the correlation significant at 0.01 level

Download full size | View in the Article

Fig. 6. PNC estimation of potato based on FFPs using PLSR

Download full size | View in the Article

Fig. 7. PNC estimation of potato based on FFPs using ANN

Download full size | View in the Article

数码相机传感器	参数值	高光谱传感器	参数值
类型	CMOS	型号	UHD185
镜头	FOV 84°	尺寸/(mm×mm×mm)	195×67×60
快门速度/s	8~1/8 000	相机质量/g	470
有效像素/万	2 000	波谱范围/nm	450~950
对焦距离/自动	1 m~无穷远	采样间隔/nm	4
照片尺寸	4 864×3 648	光谱分辨率/nm	8

Table 1. Sensor parameters

View in the Article

生育期	OGEP	建模			验证
生育期	OGEP	R²	RMSE/%	NRMSE/%	R²	RMSE/%	NRMSE/%
现蕾期	D_sum	0.54	0.55	14.97	0.77	0.37	14.21
块茎形成期	D_sum	0.44	0.46	14.53	0.80	0.37	14.32
块茎增长期	D_g/D_gmin	0.47	0.44	16.46	0.48	0.39	16.63
淀粉积累期	R_max	0.47	0.34	11.92	0.45	0.36	11.54
成熟期	D_sum	0.49	0.37	14.02	0.31	0.37	13.33

Table 2. PNC of potato estimated by using optimal green edge parameter

View in the Article

生育期	OFFP	建模			验证
生育期	OFFP	R²	RMSE/%	NRMSE/%	R²	RMSE/%	NRMSE/%
现蕾期	SD_g/1+VC_uav	0.68	0.46	12.50	0.77	0.38	11.29
块茎形成期	SD_g/1+VC_uav	0.67	0.35	11.07	0.86	0.25	10.41
块茎增长期	D_sum/1+VC_uav	0.78	0.281	0.52	0.76	0.25	10.14
淀粉积累期	D_sum/1+VC_uav	0.53	0.34	11.35	0.72	0.30	10.82
成熟期	D_g/1+VC_uav	0.30	0.43	16.47	0.47	0.38	16.43

Table 3. Estimated values of potato PNC with optimal fusion feature parameters

View in the Article

生育期	模型变量	PLSR						ANN
		建模			验证			建模			验证
		R²	RMSE /%	NRMSE /%	R²	RMSE /%	NRMSE /%	R²	RMSE /%	NRMSE /%	R²	RMSE /%	NRMSE /%
P1	GEPs	0.73	0.42	11.61	0.77	0.41	10.47	0.77	0.43	11.89	0.81	0.39	10.09
P1	FFPs	0.74	0.41	11.35	0.78	0.41	10.48	0.84	0.34	9.30	0.86	0.32	8.08
P2	GEPs	0.72	0.32	10.30	0.68	0.35	10.38	0.74	0.33	10.47	0.72	0.40	12.03
P2	FFPs	0.77	0.29	9.32	0.85	0.28	8.55	0.80	0.27	8.70	0.84	0.30	8.96
P3	GEPs	0.50	0.42	15.94	0.62	0.34	12.25	0.57	0.39	14.72	0.67	0.30	10.93
P3	FFPs	0.79	0.28	10.38	0.77	0.25	9.22	0.83	0.25	9.51	0.79	0.25	9.09
P4	GEPs	0.47	0.34	11.9	10.47	0.36	11.50	0.55	0.33	11.56	0.50	0.36	11.36
P4	FFPs	0.67	0.29	9.71	0.73	0.29	10.53	0.71	0.27	9.05	0.74	0.29	10.44
P5	GEPs	0.53	0.35	13.5	10.47	0.34	12.18	0.64	0.32	12.22	0.46	0.33	11.88
P5	FFPs	0.37	0.41	15.57	0.51	0.33	11.98	0.53	0.36	13.66	0.42	0.34	12.16

Table 4. PNC estimations of potato at different growth stages by using PLSR and ANN

Download Citation

Save the article for my favorites

Paper Information