Research of Light Use Efficiency for Paddy Rice Using Multi-Angle Hyperspectral Observations
Light use efficiency (LUE) is a critical variable for modeling gross primary production (GPP) of vegetation. The photochemical reflectance index (PRI) is based on reflectance at 531 and 570 nm, which has great potential in predicting the light use efficiency (LUE) and makes LUE related to plant opti...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2022-07-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.829315/full |
| _version_ | 1811292476328116224 |
|---|---|
| author | Jianmao Guo Jianmao Guo Zhanhao Zhang Caiyun Guo Shuyuan Jin |
| author_facet | Jianmao Guo Jianmao Guo Zhanhao Zhang Caiyun Guo Shuyuan Jin |
| author_sort | Jianmao Guo |
| collection | DOAJ |
| description | Light use efficiency (LUE) is a critical variable for modeling gross primary production (GPP) of vegetation. The photochemical reflectance index (PRI) is based on reflectance at 531 and 570 nm, which has great potential in predicting the light use efficiency (LUE) and makes LUE related to plant optical characteristics. Despite the great achievement in understanding the correlation of PRI and LUE on forests, the application of PRI in estimating LUE on crops has almost been ignored. The present study reported the ability of multi-angle PRI to track eddy covariance (EC)-based LUE in a rice field in East China. We found that PRI can estimate LUE in sunny days (R2 = 0.4; p < 0.05). The correlation of PRI and LUE was greater than that at OZA of 0° (R2 = 0.4; p < 0.05) after distinguishing different OZAs and scatter directions and was the greatest in the backscatter direction with an OZA of 60° (R2 = 0.7; p < 0.01). This correlation was also corrected by the bidirectional reflectance distribution function (BRDF), where R2 = 0.72 after correction. We noted that the relationship between PRI and LUE on cloudy days was poor, where R2 = 0.26. Photosynthetically active radiation (PAR) had an influence on the LUE and PRI, while vapor pressure deficit (VPD) and air temperature (Ta) had negative influences on the correlation of PRI and LUE. Our research suggests that PRI can efficiently track the LUE of the rice growth period when considering environmental factors and rice canopy structures. |
| first_indexed | 2024-04-13T04:45:52Z |
| format | Article |
| id | doaj.art-523204c21bc741b1b4a8f3427a9b1fcc |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-13T04:45:52Z |
| publishDate | 2022-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-523204c21bc741b1b4a8f3427a9b1fcc2022-12-22T03:01:50ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-07-011010.3389/feart.2022.829315829315Research of Light Use Efficiency for Paddy Rice Using Multi-Angle Hyperspectral ObservationsJianmao Guo0Jianmao Guo1Zhanhao Zhang2Caiyun Guo3Shuyuan Jin4College of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, ChinaJiangsu Key Laboratory of Agricultural Meteorology, Nanjing, ChinaCollege of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, ChinaCollege of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, ChinaCollege of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, ChinaLight use efficiency (LUE) is a critical variable for modeling gross primary production (GPP) of vegetation. The photochemical reflectance index (PRI) is based on reflectance at 531 and 570 nm, which has great potential in predicting the light use efficiency (LUE) and makes LUE related to plant optical characteristics. Despite the great achievement in understanding the correlation of PRI and LUE on forests, the application of PRI in estimating LUE on crops has almost been ignored. The present study reported the ability of multi-angle PRI to track eddy covariance (EC)-based LUE in a rice field in East China. We found that PRI can estimate LUE in sunny days (R2 = 0.4; p < 0.05). The correlation of PRI and LUE was greater than that at OZA of 0° (R2 = 0.4; p < 0.05) after distinguishing different OZAs and scatter directions and was the greatest in the backscatter direction with an OZA of 60° (R2 = 0.7; p < 0.01). This correlation was also corrected by the bidirectional reflectance distribution function (BRDF), where R2 = 0.72 after correction. We noted that the relationship between PRI and LUE on cloudy days was poor, where R2 = 0.26. Photosynthetically active radiation (PAR) had an influence on the LUE and PRI, while vapor pressure deficit (VPD) and air temperature (Ta) had negative influences on the correlation of PRI and LUE. Our research suggests that PRI can efficiently track the LUE of the rice growth period when considering environmental factors and rice canopy structures.https://www.frontiersin.org/articles/10.3389/feart.2022.829315/fullphotochemical reflectance index (PRI)light use efficiency (LUE)multi-angle observationremote sensingcarbon fluxesBRDF model |
| spellingShingle | Jianmao Guo Jianmao Guo Zhanhao Zhang Caiyun Guo Shuyuan Jin Research of Light Use Efficiency for Paddy Rice Using Multi-Angle Hyperspectral Observations Frontiers in Earth Science photochemical reflectance index (PRI) light use efficiency (LUE) multi-angle observation remote sensing carbon fluxes BRDF model |
| title | Research of Light Use Efficiency for Paddy Rice Using Multi-Angle Hyperspectral Observations |
| title_full | Research of Light Use Efficiency for Paddy Rice Using Multi-Angle Hyperspectral Observations |
| title_fullStr | Research of Light Use Efficiency for Paddy Rice Using Multi-Angle Hyperspectral Observations |
| title_full_unstemmed | Research of Light Use Efficiency for Paddy Rice Using Multi-Angle Hyperspectral Observations |
| title_short | Research of Light Use Efficiency for Paddy Rice Using Multi-Angle Hyperspectral Observations |
| title_sort | research of light use efficiency for paddy rice using multi angle hyperspectral observations |
| topic | photochemical reflectance index (PRI) light use efficiency (LUE) multi-angle observation remote sensing carbon fluxes BRDF model |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.829315/full |
| work_keys_str_mv | AT jianmaoguo researchoflightuseefficiencyforpaddyriceusingmultianglehyperspectralobservations AT jianmaoguo researchoflightuseefficiencyforpaddyriceusingmultianglehyperspectralobservations AT zhanhaozhang researchoflightuseefficiencyforpaddyriceusingmultianglehyperspectralobservations AT caiyunguo researchoflightuseefficiencyforpaddyriceusingmultianglehyperspectralobservations AT shuyuanjin researchoflightuseefficiencyforpaddyriceusingmultianglehyperspectralobservations |