Broadband Normalized Difference Reflectance Indices and the Normalized Red–Green Index as a Measure of Drought in Wheat and Pea Plants
Global climatic changes increase areas that are influenced by drought. Remote sensing based on the spectral characteristics of reflected light is widely used to detect the action of stressors (including drought) in plants. The development of methods of improving remote sensing is an important applie...
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MDPI AG
2024-12-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/14/1/71 |
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| author | Ekaterina Sukhova Yuriy Zolin Alyona Popova Kseniya Grebneva Lyubov Yudina Vladimir Sukhov |
| author_facet | Ekaterina Sukhova Yuriy Zolin Alyona Popova Kseniya Grebneva Lyubov Yudina Vladimir Sukhov |
| author_sort | Ekaterina Sukhova |
| collection | DOAJ |
| description | Global climatic changes increase areas that are influenced by drought. Remote sensing based on the spectral characteristics of reflected light is widely used to detect the action of stressors (including drought) in plants. The development of methods of improving remote sensing is an important applied task for plant cultivation. Particularly, this improvement can be based on the calculation of reflectance indices and revealing the optimal spectral bandwidths for this calculation. In the current work, we analyzed the sensitivity of broadband-normalized difference reflectance indices and RGB indices to the action of soil drought on pea and wheat plants. Analysis of the heat maps of significant changes in reflectance indices showed that increasing the spectral bandwidths did not decrease this significance in some cases. Particularly, the index RI(659, 553) based on the red and green bandwidths was strongly sensitive to drought action in plants. The normalized red–green index (NRGI), which was the RGB-analog of RI(659, 553) measured by a color camera, was also sensitive to drought. RI(659, 553) and NRGI were strongly related. The results showed that broadband and RGB indices can be used to detect drought action in plants. |
| format | Article |
| id | doaj-art-3f42616aa7654d8e91adf558f07d3416 |
| institution | Kabale University |
| issn | 2223-7747 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj-art-3f42616aa7654d8e91adf558f07d34162025-01-10T13:19:39ZengMDPI AGPlants2223-77472024-12-011417110.3390/plants14010071Broadband Normalized Difference Reflectance Indices and the Normalized Red–Green Index as a Measure of Drought in Wheat and Pea PlantsEkaterina Sukhova0Yuriy Zolin1Alyona Popova2Kseniya Grebneva3Lyubov Yudina4Vladimir Sukhov5Department of Biophysics, N.I. Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, RussiaDepartment of Biophysics, N.I. Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, RussiaDepartment of Biophysics, N.I. Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, RussiaDepartment of Biophysics, N.I. Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, RussiaDepartment of Biophysics, N.I. Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, RussiaDepartment of Biophysics, N.I. Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, RussiaGlobal climatic changes increase areas that are influenced by drought. Remote sensing based on the spectral characteristics of reflected light is widely used to detect the action of stressors (including drought) in plants. The development of methods of improving remote sensing is an important applied task for plant cultivation. Particularly, this improvement can be based on the calculation of reflectance indices and revealing the optimal spectral bandwidths for this calculation. In the current work, we analyzed the sensitivity of broadband-normalized difference reflectance indices and RGB indices to the action of soil drought on pea and wheat plants. Analysis of the heat maps of significant changes in reflectance indices showed that increasing the spectral bandwidths did not decrease this significance in some cases. Particularly, the index RI(659, 553) based on the red and green bandwidths was strongly sensitive to drought action in plants. The normalized red–green index (NRGI), which was the RGB-analog of RI(659, 553) measured by a color camera, was also sensitive to drought. RI(659, 553) and NRGI were strongly related. The results showed that broadband and RGB indices can be used to detect drought action in plants.https://www.mdpi.com/2223-7747/14/1/71droughtheat mapsmultispectral imagingRGB imagingRGB indicesremote sensing |
| spellingShingle | Ekaterina Sukhova Yuriy Zolin Alyona Popova Kseniya Grebneva Lyubov Yudina Vladimir Sukhov Broadband Normalized Difference Reflectance Indices and the Normalized Red–Green Index as a Measure of Drought in Wheat and Pea Plants Plants drought heat maps multispectral imaging RGB imaging RGB indices remote sensing |
| title | Broadband Normalized Difference Reflectance Indices and the Normalized Red–Green Index as a Measure of Drought in Wheat and Pea Plants |
| title_full | Broadband Normalized Difference Reflectance Indices and the Normalized Red–Green Index as a Measure of Drought in Wheat and Pea Plants |
| title_fullStr | Broadband Normalized Difference Reflectance Indices and the Normalized Red–Green Index as a Measure of Drought in Wheat and Pea Plants |
| title_full_unstemmed | Broadband Normalized Difference Reflectance Indices and the Normalized Red–Green Index as a Measure of Drought in Wheat and Pea Plants |
| title_short | Broadband Normalized Difference Reflectance Indices and the Normalized Red–Green Index as a Measure of Drought in Wheat and Pea Plants |
| title_sort | broadband normalized difference reflectance indices and the normalized red green index as a measure of drought in wheat and pea plants |
| topic | drought heat maps multispectral imaging RGB imaging RGB indices remote sensing |
| url | https://www.mdpi.com/2223-7747/14/1/71 |
| work_keys_str_mv | AT ekaterinasukhova broadbandnormalizeddifferencereflectanceindicesandthenormalizedredgreenindexasameasureofdroughtinwheatandpeaplants AT yuriyzolin broadbandnormalizeddifferencereflectanceindicesandthenormalizedredgreenindexasameasureofdroughtinwheatandpeaplants AT alyonapopova broadbandnormalizeddifferencereflectanceindicesandthenormalizedredgreenindexasameasureofdroughtinwheatandpeaplants AT kseniyagrebneva broadbandnormalizeddifferencereflectanceindicesandthenormalizedredgreenindexasameasureofdroughtinwheatandpeaplants AT lyubovyudina broadbandnormalizeddifferencereflectanceindicesandthenormalizedredgreenindexasameasureofdroughtinwheatandpeaplants AT vladimirsukhov broadbandnormalizeddifferencereflectanceindicesandthenormalizedredgreenindexasameasureofdroughtinwheatandpeaplants |