[Estimation of rice LAI by using NDVI at different spectral bandwidths].
Identifieur interne : 000A53 ( Main/Exploration ); précédent : 000A52; suivant : 000A54[Estimation of rice LAI by using NDVI at different spectral bandwidths].
Auteurs : Fu-Min Wang [République populaire de Chine] ; Jing-Feng Huang ; Yan-Lin Tang ; Xiu-Zhen WangSource :
- Ying yong sheng tai xue bao = The journal of applied ecology [ 1001-9332 ] ; 2007.
English descriptors
- KwdEn :
- MESH :
- growth & development : Oryza, Plant Leaves.
- instrumentation : Spectrum Analysis.
- metabolism : Oryza, Plant Leaves.
- methods : Environmental Monitoring, Spectrum Analysis.
- physiology : Photosynthesis.
Abstract
The canopy hyperspectral reflectance data of rice at its different development stages were collected from field measurement, and the corresponding NDVIs as well as the correlation coefficients of NDVIs and LAI were computed at extending bandwidth of TM red and near-infrared (NIR) spectra. According to the variation characteristics of best fitted R2 with spectral bandwidth, the optimal bandwidth was determined. The results showed that the correlation coefficients of LAI and ND-VI and the maximum R2 of the best fitted functions at different spectral bandwidths had the same variation trend, i.e., decreased with increasing bandwidth when the bandwidth was less than 60 nm. However, when the bandwidth was beyond 60 nm, the maximum R2 somewhat fluctuated due to the effect of NIR. The analysis of R2 variation with bandwidth indicated that 15 nm was the optimal bandwidth for the estimation of rice LAI by using NDVI.
PubMed: 18260445
Affiliations:
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Le document en format XML
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sortKey="Huang, Jing Feng" sort="Huang, Jing Feng" uniqKey="Huang J" first="Jing-Feng" last="Huang">Jing-Feng Huang</name></author><author><name sortKey="Tang, Yan Lin" sort="Tang, Yan Lin" uniqKey="Tang Y" first="Yan-Lin" last="Tang">Yan-Lin Tang</name></author><author><name sortKey="Wang, Xiu Zhen" sort="Wang, Xiu Zhen" uniqKey="Wang X" first="Xiu-Zhen" last="Wang">Xiu-Zhen Wang</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2007">2007</date><idno type="RBID">pubmed:18260445</idno><idno type="pmid">18260445</idno><idno type="wicri:Area/PubMed/Corpus">000349</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000349</idno><idno type="wicri:Area/PubMed/Curation">000349</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">000349</idno><idno type="wicri:Area/PubMed/Checkpoint">000349</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" 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Sensing & Information System Application, Zhejiang University, Hangzhou 310029</wicri:regionArea><placeName><settlement type="city">Hangzhou</settlement><region type="province">Zhejiang</region></placeName><orgName type="university">Université de Zhejiang</orgName><placeName><settlement type="city">Hangzhou</settlement><region type="province">Zhejiang</region></placeName></affiliation></author><author><name sortKey="Huang, Jing Feng" sort="Huang, Jing Feng" uniqKey="Huang J" first="Jing-Feng" last="Huang">Jing-Feng Huang</name></author><author><name sortKey="Tang, Yan Lin" sort="Tang, Yan Lin" uniqKey="Tang Y" first="Yan-Lin" last="Tang">Yan-Lin Tang</name></author><author><name sortKey="Wang, Xiu Zhen" sort="Wang, Xiu Zhen" uniqKey="Wang X" first="Xiu-Zhen" last="Wang">Xiu-Zhen Wang</name></author></analytic><series><title level="j">Ying yong sheng tai xue bao = The journal of applied ecology</title><idno type="ISSN">1001-9332</idno><imprint><date when="2007" type="published">2007</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Environmental Monitoring (methods)</term><term>Oryza (growth & development)</term><term>Oryza (metabolism)</term><term>Photosynthesis (physiology)</term><term>Plant Leaves (growth & development)</term><term>Plant Leaves (metabolism)</term><term>Spectrum Analysis (instrumentation)</term><term>Spectrum Analysis (methods)</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Oryza</term><term>Plant Leaves</term></keywords><keywords scheme="MESH" qualifier="instrumentation" xml:lang="en"><term>Spectrum Analysis</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Oryza</term><term>Plant Leaves</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Environmental Monitoring</term><term>Spectrum Analysis</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Photosynthesis</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The canopy hyperspectral reflectance data of rice at its different development stages were collected from field measurement, and the corresponding NDVIs as well as the correlation coefficients of NDVIs and LAI were computed at extending bandwidth of TM red and near-infrared (NIR) spectra. According to the variation characteristics of best fitted R2 with spectral bandwidth, the optimal bandwidth was determined. The results showed that the correlation coefficients of LAI and ND-VI and the maximum R2 of the best fitted functions at different spectral bandwidths had the same variation trend, i.e., decreased with increasing bandwidth when the bandwidth was less than 60 nm. However, when the bandwidth was beyond 60 nm, the maximum R2 somewhat fluctuated due to the effect of NIR. The analysis of R2 variation with bandwidth indicated that 15 nm was the optimal bandwidth for the estimation of rice LAI by using NDVI.</div></front></TEI><affiliations><list><country><li>République populaire de Chine</li></country><region><li>Zhejiang</li></region><settlement><li>Hangzhou</li></settlement><orgName><li>Université de Zhejiang</li></orgName></list><tree><noCountry><name sortKey="Huang, Jing Feng" sort="Huang, Jing Feng" uniqKey="Huang J" first="Jing-Feng" last="Huang">Jing-Feng Huang</name><name sortKey="Tang, Yan Lin" sort="Tang, Yan Lin" uniqKey="Tang Y" first="Yan-Lin" last="Tang">Yan-Lin Tang</name><name sortKey="Wang, Xiu Zhen" sort="Wang, Xiu Zhen" uniqKey="Wang X" first="Xiu-Zhen" last="Wang">Xiu-Zhen Wang</name></noCountry><country name="République populaire de Chine"><region name="Zhejiang"><name sortKey="Wang, Fu Min" sort="Wang, Fu Min" uniqKey="Wang F" first="Fu-Min" last="Wang">Fu-Min Wang</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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