Researching | Estimation of Potato Above Ground Biomass Based on UAV Multispectral Images

Journals >Spectroscopy and Spectral Analysis >Volume 41 >Issue 8 >Page 2549 > Article

Spectroscopy and Spectral Analysis
Vol. 41, Issue 8, 2549 (2021)

Estimation of Potato Above Ground Biomass Based on UAV Multispectral Images

DOI: 10.3964/j.issn.1000-0593(2021)08-2549-07 Cite this Article

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波段	中心波长/nm	带宽/nm
绿	550	40
红	660	40
红边	735	10
近红外	790	40

Table 1. Band parameters of multispectral sensor

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光谱变量	计算公式	参考文献
GREVI	GREVI=GRE	本工作
REDVI	REDVI=RED	本工作
REGVI	REGVI=REG	本工作
NIRVI	NIRVI=NIR	本工作
RVI	RVI=NIR/RED	[10]
MSR	MSR=(NIR/RED-1)/(NIR/RED+1)^1/2	[11]
GNDVI	GNDVI=(NIR-GRE)/(NIR+GRE)	[11]
NLI	NLI=(NIR²-RED)/(NIR²+RED)	[7]
SAVI	SAVI=1.5×(NIR-RED)/(NIR+RED+0.5)	[10]
RDVI	RDVI=(NIR-RED)/(NIR+RED)^1/2	[7]
OSAVI	OSAVI=1.16×(NIR-RED)/(NIR+RED+0.16)	[11]
DVI	DVI=NIR-RED	[7]
NDVI	NDVI=(NIR-RED)/(NIR+RED)	[11]

Table 2. Model parameters

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模型参数	块茎形成期	块茎增长期	淀粉积累期
GREVI	0.686	0.659	0.672
REDVI	0.421	0.621	0.494
REGVI	0.703	0.721	0.727
NIRVI	0.684	0.731	0.724
RVI	0.750	0.727	0.744
MSR	0.739	0.741	0.746
GNDVI	0.718	0.762	0.759
NLI	0.716	0.748	0.747
SAVI	0.712	0.748	0.747
RDVI	0.712	0.749	0.747
OSAVI	0.711	0.747	0.747
DVI	0.710	0.750	0.746
NDVI	0.711	0.745	0.747
REGHL	0.709	0.711	0.700
REGLH	0.695	0.734	0.678
REGLL	0.721	0.744	0.732
Hdsm	0.606	0.682	0.564

Table 3. The correlation coefficients of vegetation indices and Hdsm with potato AGB

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生育期	模型参数	PLSR				RR
		建模		验证		建模		验证
		R²	NRMSE/%	R²	NRMSE/%	R²	NRMSE/%	R²	NRMSE/%
块茎形成期	SVIs	0.48	20.12	0.59	19.21	0.46	21.61	0.55	20.14
块茎形成期	MVIs	0.61	18.34	0.64	17.37	0.59	19.58	0.62	18.83
块茎增长期	SVIs	0.58	18.26	0.61	17.18	0.53	19.58	0.58	18.78
块茎增长期	MVIs	0.65	17.48	0.68	16.71	0.62	18.42	0.65	17.75
淀粉积累期	SVIs	0.46	23.68	0.54	22.84	0.42	24.09	0.49	23.87
淀粉积累期	MVIs	0.59	21.45	0.62	20.96	0.56	23.34	0.60	22.85

Table 4. Estimation of potato AGB using partial least squares regression and ridge regression based on vegetation indices

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生育期	模型参数	PLSR				RR
		建模		验证		建模		验证
		R²	NRMSE/%	R²	NRMSE/%	R²	NRMSE/%	R²	NRMSE/%
块茎形成期	VIs+Hdsm	0.65	17.42	0.67	16.16	0.60	18.86	0.65	17.19
块茎形成期	VIs+HFI	0.68	16.56	0.70	15.46	0.62	17.61	0.68	16.74
块茎增长期	VIs+Hdsm	0.68	16.07	0.71	15.84	0.65	17.58	0.69	16.95
块茎增长期	VIs+HFI	0.72	15.44	0.74	15.33	0.67	16.34	0.70	15.62
淀粉积累期	VIs+Hdsm	0.62	20.34	0.64	19.53	0.58	21.03	0.63	20.72
淀粉积累期	VIs+HFI	0.63	19.36	0.66	18.85	0.61	20.17	0.65	19.98

Table 5. Estimation of potato AGB using partial least squares regression and ridge regression based on vegetation indices combined with HFI or Hdsm

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生育期	模型参数	PLSR				RR
		建模		验证		建模		验证
		R²	NRMSE/%	R²	NRMSE/%	R²	NRMSE/%	R²	NRMSE/%
块茎形成期	VIs+Hdsm+HFI	0.70	16.46	0.71	15.08	0.66	16.98	0.68	16.33
块茎增长期	VIs+Hdsm+HFI	0.73	15.22	0.75	14.62	0.69	15.56	0.71	15.47
淀粉积累期	VIs+Hdsm+HFI	0.65	18.83	0.68	17.62	0.64	19.17	0.67	18.26

Table 6. Estimation of potato AGB using partial least squares regression and ridge regression based on vegetation indices combined with HFI and Hdsm

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