globalchange  > 气候变化事实与影响
DOI: 10.1016/j.jag.2013.05.013
Scopus记录号: 2-s2.0-84897866472
论文题名:
Understanding the optical responses of leaf nitrogen in mediterranean holm oak (Quercus ilex) using field spectroscopy
作者: Pacheco-Labrador J; , González-Cascón R; , Pilar Martín M; , Riaño D
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2014
卷: 26, 期:1
起始页码: 105
结束页码: 118
语种: 英语
英文关键词: Field spectroscopy ; Leaf nitrogen ; Quercus ilex ; Spectral index
Scopus关键词: absorption ; bootstrapping ; chlorophyll ; correlation ; empirical analysis ; evergreen tree ; leaf ; nitrogen ; remote sensing ; vegetation
英文摘要: The direct estimation of nitrogen (N) in fresh vegetation is challenging due to its weak influence on leaf reflectance and the overlaps with absorption features of other compounds. Different empirical modelsrelate in this work leaf nitrogen concentration ([N]Leaf) on Holm oak to leaf reflectance as well as derivedspectral indices such as normalized difference indices (NDIs), the three bands indices (TBIs) and indices previously used to predict leaf N and chlorophyll. The models were calibrated and assessed their accuracy, robustness and the strength of relationship when other biochemicals were considered. Red edge was the spectral region most strongly correlated with [N]Leaf, whereas most of the published spectral indexesdid not provide accurate estimations. NDIs and TBIs based models could achieve robust and acceptableaccuracies (TBI1310,1720,730: R2= 0.76, [0.64,0.86]; RMSE (%) = 9.36, [7.04,12.83]). These models sometimesincluded indices with bands close to absorption features of N bonds or nitrogenous compounds, but also of other biochemicals. Models were independently and inter-annually validated using the bootstrap method, which allowed discarding those models non-robust across different years. Partial correlationanalysis revealed that spectral estimators did not strongly respond to [N]Leaf but to other leaf variablessuch as chlorophyll and water, even if bands close to absorption features of N bonds or compounds werepresent in the models. © 2013 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79643
Appears in Collections:气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: Laboratorio de Espectro-radiometría y Teledetección Ambiental (SpecLab), Instituto de Economía, Geografía y Demografía, Centro de Ciencias Humanas y Sociales, Consejo Superior de Investigaciones Científicas (CSIC), C/Albasanz 26-28, 28037 Madrid, Spain; Departamento de Medio Ambiente, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Ctra. Coruña, Km. 7,5, 28040 Madrid, Spain; Center for Spatial Technologies and Remote Sensing (CSTARS), Department of Land, Air and Water Resources, University of California, One Shields Avenue, Davis, CA 95616-8617, United States

Recommended Citation:
Pacheco-Labrador J,, González-Cascón R,, Pilar Martín M,et al. Understanding the optical responses of leaf nitrogen in mediterranean holm oak (Quercus ilex) using field spectroscopy[J]. International Journal of Applied Earth Observation and Geoinformation,2014-01-01,26(1)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Pacheco-Labrador J]'s Articles
[, González-Cascón R]'s Articles
[, Pilar Martín M]'s Articles
百度学术
Similar articles in Baidu Scholar
[Pacheco-Labrador J]'s Articles
[, González-Cascón R]'s Articles
[, Pilar Martín M]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Pacheco-Labrador J]‘s Articles
[, González-Cascón R]‘s Articles
[, Pilar Martín M]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.