Relating X-band SAR backscattering to leaf area index of rice in different phenological phases
The objective of this study is to provide complete information on the dynamic relationship between X-band (3.11 cm) backscattering intensity (σ°) and rice crop’s leaf area index (LAI) at all growth phases. Though the relationship between X-band σ° and LAI has been previously explored, details on the...
| Autores principales: | , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2019
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/164665 |
| _version_ | 1855524353130627072 |
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| author | Asilo, Sonia Nelson, Andrew de Bie, Kees Skidmore, Andrew Laborte, Alice Maunahan, Aileen Quilang, Eduardo Jimmy P. |
| author_browse | Asilo, Sonia Laborte, Alice Maunahan, Aileen Nelson, Andrew Quilang, Eduardo Jimmy P. Skidmore, Andrew de Bie, Kees |
| author_facet | Asilo, Sonia Nelson, Andrew de Bie, Kees Skidmore, Andrew Laborte, Alice Maunahan, Aileen Quilang, Eduardo Jimmy P. |
| author_sort | Asilo, Sonia |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The objective of this study is to provide complete information on the dynamic relationship between X-band (3.11 cm) backscattering intensity (σ°) and rice crop’s leaf area index (LAI) at all growth phases. Though the relationship between X-band σ° and LAI has been previously explored, details on the relationship at the reproductive phase remain unstudied. LAI at the reproductive phase is important particularly at the heading stage where LAI reaches its maximum as it is closely related to grain yield, and at flowering stage where the total leaf area affects the amount of photosynthates. Therefore, this study examined the relationship of increasing LAI (vegetative to reproductive phase) and decreasing LAI (ripening phase) with TerraSAR-X (TSX) ScanSAR (3.11 cm) σ° at HH polarisation and 45° incidence angle. The results showed a statistically significant (R2 = 0.51, p value < 0.001) non-linear relationship of LAI with σ° at the vegetative to reproductive phase while no significant linear relationship was found at the ripening phase. This study completes the response curve of X-band σ° to LAI by filling in the information on the reproductive phase which more accurately characterises the dynamic relationship between the rice crop’s LAI and X-band’s σ°. This contributes to improved knowledge on the use of X-band data for estimating LAI for the whole crop cycle which is essential for the modelling of crop growth and estimation of yield. |
| format | Journal Article |
| id | CGSpace164665 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1646652024-12-22T05:44:52Z Relating X-band SAR backscattering to leaf area index of rice in different phenological phases Asilo, Sonia Nelson, Andrew de Bie, Kees Skidmore, Andrew Laborte, Alice Maunahan, Aileen Quilang, Eduardo Jimmy P. yields plant growth stages heading date flowering The objective of this study is to provide complete information on the dynamic relationship between X-band (3.11 cm) backscattering intensity (σ°) and rice crop’s leaf area index (LAI) at all growth phases. Though the relationship between X-band σ° and LAI has been previously explored, details on the relationship at the reproductive phase remain unstudied. LAI at the reproductive phase is important particularly at the heading stage where LAI reaches its maximum as it is closely related to grain yield, and at flowering stage where the total leaf area affects the amount of photosynthates. Therefore, this study examined the relationship of increasing LAI (vegetative to reproductive phase) and decreasing LAI (ripening phase) with TerraSAR-X (TSX) ScanSAR (3.11 cm) σ° at HH polarisation and 45° incidence angle. The results showed a statistically significant (R2 = 0.51, p value < 0.001) non-linear relationship of LAI with σ° at the vegetative to reproductive phase while no significant linear relationship was found at the ripening phase. This study completes the response curve of X-band σ° to LAI by filling in the information on the reproductive phase which more accurately characterises the dynamic relationship between the rice crop’s LAI and X-band’s σ°. This contributes to improved knowledge on the use of X-band data for estimating LAI for the whole crop cycle which is essential for the modelling of crop growth and estimation of yield. 2019-06-20 2024-12-19T12:54:09Z 2024-12-19T12:54:09Z Journal Article https://hdl.handle.net/10568/164665 en Open Access MDPI Asilo, Sonia; Nelson, Andrew; de Bie, Kees; Skidmore, Andrew; Laborte, Alice; Maunahan, Aileen and Quilang, Eduardo Jimmy P. 2019. Relating X-band SAR backscattering to leaf area index of rice in different phenological phases. Remote Sensing, Volume 11 no. 12 p. 1462 |
| spellingShingle | yields plant growth stages heading date flowering Asilo, Sonia Nelson, Andrew de Bie, Kees Skidmore, Andrew Laborte, Alice Maunahan, Aileen Quilang, Eduardo Jimmy P. Relating X-band SAR backscattering to leaf area index of rice in different phenological phases |
| title | Relating X-band SAR backscattering to leaf area index of rice in different phenological phases |
| title_full | Relating X-band SAR backscattering to leaf area index of rice in different phenological phases |
| title_fullStr | Relating X-band SAR backscattering to leaf area index of rice in different phenological phases |
| title_full_unstemmed | Relating X-band SAR backscattering to leaf area index of rice in different phenological phases |
| title_short | Relating X-band SAR backscattering to leaf area index of rice in different phenological phases |
| title_sort | relating x band sar backscattering to leaf area index of rice in different phenological phases |
| topic | yields plant growth stages heading date flowering |
| url | https://hdl.handle.net/10568/164665 |
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