Diagnosis of Nitrogen Nutrition in Flue-Cured Tobacco Based on UAV Visible Spectrum Platform

Zhi-wei SUN; Xiao-lin WANG; Qi-ming ZHANG; Ju-min YUAN; Shuang ZHANG; Hui-feng YAN; Shu-sheng WANG

doi:10.3964/j.issn.1000-0593(2021)02-0586-06

Journals >Spectroscopy and Spectral Analysis >Volume 41 >Issue 2 >Page 586 > Article

Spectroscopy and Spectral Analysis
Vol. 41, Issue 2, 586 (2021)

Diagnosis of Nitrogen Nutrition in Flue-Cured Tobacco Based on UAV Visible Spectrum Platform

Zhi-wei SUN^1、1、*, Xiao-lin WANG^1、1, Qi-ming ZHANG^1、1, Ju-min YUAN^1、1, Shuang ZHANG^1、1, Hui-feng YAN^1、1, and Shu-sheng WANG^1、1

Author Affiliations

¹[in Chinese]

¹1. Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture and Rural Affairs, Qingdao 266101, China

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DOI: 10.3964/j.issn.1000-0593(2021)02-0586-06 Cite this Article

Zhi-wei SUN, Xiao-lin WANG, Qi-ming ZHANG, Ju-min YUAN, Shuang ZHANG, Hui-feng YAN, Shu-sheng WANG. Diagnosis of Nitrogen Nutrition in Flue-Cured Tobacco Based on UAV Visible Spectrum Platform[J]. Spectroscopy and Spectral Analysis, 2021, 41(2): 586 Copy Citation Text

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Fig. 1. Regression analysis between canopy color indexes and tobacco nitrogen indexes

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Relationship between predicted and actual nitrogen concentrations in shoot and leaf of flue-cured tobacco using color index as independent variables

Fig. 2. Relationship between predicted and actual nitrogen concentrations in shoot and leaf of flue-cured tobacco using color index as independent variables

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颜色指标类型	颜色指标及计算方法	参考文献
归一化颜色指标	NRI=R/(R+G+B)	[8]
	NGI=G/(R+G+B)	[4]
	NBI=B/(R+G+B)	[9]
比颜色指标	G/R	[8]
	G/B	[5]
	G/(R+B)	[10]
归一化差分颜色指标	(G-R)/(R+G+B)	[11]
	(R-B)/(R+G+B)	[10]
	(G-B)/(R+G+B)	[12]
	ExG=(2G-R-B)/(G+R+B)	[11]

Table 1. Classification and calculation of color indexes

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处理	团棵期			旺长后期			下部叶成熟期
处理	红光值R	绿光值G	蓝光值B	红光值R	绿光值G	蓝光值B	红光值R	绿光值G	蓝光值B
N0	98.63 a	125.66 a	109.99 a	120.52 a	146.63 a	85.81 a	95.64 a	113.94 a	66.32 a
N1	97.13 a	126.08 a	108.37 a	104.21 b	141.53 a	78.42 b	118.28 a	133.26 a	79.70 a
N2	93.85 a	124.55 a	105.93 a	93.96 c	133.71 b	75.10 c	104.57 a	120.59 a	66.57 a
N3	95.15 a	124.20 a	107.41 a	88.02 cd	128.93 bc	74.61 c	105.65 a	122.38 a	66.79 a
N4	94.61 a	124.67 a	106.42 a	81.46 de	123.62 cd	73.85 c	108.54 a	124.75 a	67.60 a
N5	94.53 a	124.96 a	107.11 a	80.60 e	122.18 d	74.00 c	96.23 a	111.95 a	64.51 a

Table 2. Difference analysis of canopy image color standard values in different growth stages

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色彩指标	地上部生物量	叶片生物量	地上部氮浓度	叶片氮浓度	叶片SPAD值
NRI	-0.560^**	-0.693^**	-0.828^**	-0.870^**	-0.930^**
NGI	0.672^**	0.703^**	0.672^**	0.701^**	0.673^**
NBI	0.274	0.454^*	0.691^**	0.732^**	0.851^**
G/R	0.606^**	0.720^**	0.822^**	0.862^**	0.899^**
G/B	0.092	-0.076	-0.350	-0.375	-0.520^**
G/(R+B)	0.672^**	0.700^**	0.673^**	0.699^**	0.669^**
(G-R)/(R+G+B)	0.631^**	0.731^**	0.810^**	0.849^**	0.878^**
(G-B)/(R+G+B)	0.300	0.158	-0.088	-0.102	-0.236
(R-B)/(R+G+B)	-0.465^*	-0.622^**	-0.804^**	-0.847^**	-0.934^**
ExG	0.672^**	0.703^**	0.672^**	0.701^**	0.673^**

Table 3. Interdependency between canopy color indexes and tobacco nitrogen indexes

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