In-Season Monitoring of Maize Leaf Water Content Using Ground-Based and UAV-Based Hyperspectral Data
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Site
2.2. Spectral Data Acquisition and Processing
2.3. Leaf Water Content
2.4. Spectral Data Analysis
2.4.1. Single Wavelengths for LWC Monitoring
2.4.2. Broadband Reflectance and Vegetation Indices for LWC Monitoring
2.4.3. Narrowband Vegetation Indices for LWC Monitoring
2.4.4. Partial Least Squares Regression (PLSR) for LWC Monitoring
3. Results and Discussion
3.1. Maize Leaf Water Content
3.2. Maize Leaf and Canopy Reflectance
3.3. Single Wavelengths for LWC Monitoring
3.4. Broadband Reflectance and Vegetation Indices for LWC Monitoring
3.5. Narrowband Vegetation Indices for LWC Monitoring
3.6. Partial Least Squares Regression Models for LWC Monitoring
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Spectral Band | Central Wavelength (nm) | Bandwidth (nm) |
---|---|---|
BLUE | 492.4 | 66 |
GREEN | 559.8 | 36 |
RED | 664.6 | 31 |
RE1 | 704.1 | 15 |
RE2 | 740.5 | 15 |
RE3 | 782.8 | 20 |
NIR | 832.8 | 106 |
SWIR1 | 1373.5 | 31 |
SWIR2 | 1613.7 | 91 |
SWIR3 | 2202.4 | 175 |
Index | Formula | Reference |
---|---|---|
BNDVI | Wang et al. [34] | |
GNDVI | Gitelson et al. [35] | |
NDVI | Rouse et al. [36] | |
NDRE1 | Gitelson and Merzlyak [37] | |
NDRE2 | Mehdaoui and Anane [38] | |
NDRE3 | Mehdaoui and Anane [38] | |
NDWI | Gao [39] | |
NDII | Hardisky et al. [40] | |
NDII 2 | Hardisky et al. [40] |
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Crusiol, L.G.T.; Sun, L.; Sun, Z.; Chen, R.; Wu, Y.; Ma, J.; Song, C. In-Season Monitoring of Maize Leaf Water Content Using Ground-Based and UAV-Based Hyperspectral Data. Sustainability 2022, 14, 9039. https://doi.org/10.3390/su14159039
Crusiol LGT, Sun L, Sun Z, Chen R, Wu Y, Ma J, Song C. In-Season Monitoring of Maize Leaf Water Content Using Ground-Based and UAV-Based Hyperspectral Data. Sustainability. 2022; 14(15):9039. https://doi.org/10.3390/su14159039
Chicago/Turabian StyleCrusiol, Luís Guilherme Teixeira, Liang Sun, Zheng Sun, Ruiqing Chen, Yongfeng Wu, Juncheng Ma, and Chenxi Song. 2022. "In-Season Monitoring of Maize Leaf Water Content Using Ground-Based and UAV-Based Hyperspectral Data" Sustainability 14, no. 15: 9039. https://doi.org/10.3390/su14159039