Spectroscopy and Spectral Analysis, Volume. 41, Issue 2, 586(2021)
Diagnosis of Nitrogen Nutrition in Flue-Cured Tobacco Based on UAV Visible Spectrum Platform
Figures & Tables(5)
Fig. 1. Regression analysis between canopy color indexes and tobacco nitrogen indexes
Fig. 2. Relationship between predicted and actual nitrogen concentrations in shoot and leaf of flue-cured tobacco using color index as independent variables
Table 1. Classification and calculation of color indexes
View tableView in ArticleTable 1. Classification and calculation of color indexes
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 2. Difference analysis of canopy image color standard values in different growth stages
View tableView in ArticleTable 2. Difference analysis of canopy image color standard values in different growth stages
处理 团棵期 旺长后期 下部叶成熟期 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 3. Interdependency between canopy color indexes and tobacco nitrogen indexes
View tableView in ArticleTable 3. Interdependency between canopy color indexes and tobacco nitrogen indexes
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**
Tools
Get Citation
Copy Citation Text
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
Paper Information
Category: Research Articles
Received: Dec. 27, 2019
Accepted: Mar. 16, 2020
Published Online: Apr. 8, 2021
The Author Email: SUN Zhi-wei (732667191@qq.com)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20