DOI: 10.1016/j.jag.2014.04.019
Scopus记录号: 2-s2.0-84904735075
论文题名: Leaf and canopy water content estimation in cotton using hyperspectral indices and radiative transfer models
作者: Yi Q ; , Wang F ; , Bao A ; , Jiapaer G
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2014
卷: 33, 期: 1 起始页码: 67
结束页码: 75
语种: 英语
英文关键词: Cotton
; Ewt
; Ewtcanopy
; Hyperspectral vegetation indices
; PROSPECT-5 model
Scopus关键词: canopy
; cotton
; growing season
; leaf area index
; radiative transfer
; spectral analysis
; vegetation index
; water content
英文摘要: In present study some vegetation indices for estimating leaf EWT and EWT canopy were investigated using simulations and field measurements. Leaf and canopy spectral reflectance as well as leaf EWT and EWT canopy were measured in cotton during the growing seasons of 2010 and 2011. The PROSPECT-5 model was coupled with the SAILH model to explore the performance of water-related vegetation indices for leaf EWT and EWT canopy estimation. The vegetation indices evaluated were published formulations and new simple ratio vegetation indices formulated with wavebands at 1060nm and 1640nm. The sensitivities of these indices to leaf internal structural N and LAI effects were assessed. Simulation results indicated that all of the water-related vegetation indices were insensitive to leaf internal structural N, with the highest coefficient of determination R2 < 0.15 and the proposed index SR1640(R1060/R1640) and published index SR2 (R1070/R1340) showed the lowest relationships (R2 < 0.35) with LAI of all the vegetation indices. Furthermore, coefficients of determination between simulated leaf EWT as well as EWT canopy and vegetation indices tested revealed that the new simple-ratio vegetation indices proposed in this study (SR1060: R1640/R1060 and SR1640) were found to be significantly related with leaf EWT (R2 >0.9; P< 0.001) and EWT canopy (R2 >0.8; P< 0.001). Results obtained with field measurements were in agreement with simulation results, with the coefficient of determination R2 = 0.5 (P< 0.001) for leaf EWT and R2 = 0.57 (P< 0.001) for EWTcanopy by the new simple ratio indices. This study provides a new candidate for leaf EWT and EWTcanopy estimation using hyperspectral vegetation indices. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79725
Appears in Collections: 气候变化事实与影响
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作者单位: Xinjiang Institute of Ecology, Geography Chinese Academy of Sciences, 818 Beijing South Road, Urumqi, Xinjiang 830011, China; Institute of Hydrology and Water Resources, Zhejiang University, Hangzhou, Zhejiang 310058, China
Recommended Citation:
Yi Q,, Wang F,, Bao A,et al. Leaf and canopy water content estimation in cotton using hyperspectral indices and radiative transfer models[J]. International Journal of Applied Earth Observation and Geoinformation,2014-01-01,33(1)