Optical and fluorescence properties of corn leaves from different nitrogen regimes

dc.contributor.authorMiddleton, Elizabeth M.
dc.contributor.authorMcMurtrey III, James E.
dc.contributor.authorCampbell, Petya Entcheva
dc.contributor.authorCorp, Lawrence A.
dc.contributor.authorButcher, L. Maryn
dc.contributor.authorChappelle, Emmett W.
dc.date.accessioned2023-07-13T18:55:17Z
dc.date.available2023-07-13T18:55:17Z
dc.date.issued2003-03-17
dc.descriptionInternational Symposium on Remote Sensing, 2002, Crete, Greeceen_US
dc.description.abstractThe important role of nitrogen (N) in limiting or enhancing vegetation productivity is relatively well understood, although the interaction of N with other environmental variables in natural and agricultural ecosystems needs more study. In 2001, a suite of optical, fluorescence, and biophysical measurements were collected on leaves of corn (Zea Mays L.) from field plots provided four N fertilizer application rates: 20%, 50%, 100% and 150% of optimal N levels. Two complementary sets of high-resolution (< 2 nm) optical spectra were acquired for both adaxial and abaxial leaf surfaces. The first was comprised of leaf optical properties (350-2500 nm) for reflectance, transmittance, and absorptance. The second was comprised of reflectance spectra (500-1000 nm) acquired with and without a long pass 665 nm filter to determine the fluorescence contribution to "apparent reflectance" in the 670-750 nm spectrum that includes the 685 and 740 nm chlorophyll fluorescence (ChlF) peaks. Two types of fluorescence measurements were also made on adaxial and abaxial surfaces: 1) fluorescence images in four 10 nm bands (blue, green, red, far-red) resulting from broadband irradiance excitation; and 2) emission spectra at 5 nm resolution produced by three excitation wavelengths (280, 380, and 532 nm). The strongest relationships between optical properties and foliar chemistry were obtained for a "red-edge" optical parameter versus C/N and chlorophyll b. Select optical indices and ChlF parameters were correlated. A significant contribution of steady-state ChlF to apparent reflectance was observed, averaging 10-25% at 685 nm and 2-6% at 740 nm over the range of N treatments. From all measurements assessing fluorescence, higher ChlF was measured from the abaxial leaf surfaces.en_US
dc.description.sponsorshipWe wish to acknowledge Dr. Craig S.T. Daughtry and Dr. Timothy J. Gish (Hydrology and Remote Sensing Laboratory, USDA, Beltsville MD, USA) for their coordination efforts in developing the large long-term field site and campaign entitled "Economic and Environmental Enhancement (OPE3)" of which the current study was a part. The research was conducted under the NASA Terrestrial Ecosystems Program and funded by grant NASA#622-9247.en_US
dc.description.urihttps://www.spiedigitallibrary.org/conference-proceedings-of-spie/4879/0000/Optical-and-fluorescence-properties-of-corn-leaves-from-different-nitrogen/10.1117/12.463087.shorten_US
dc.format.extent13 pagesen_US
dc.genreconference papers and proceedingsen_US
dc.identifierdoi:10.13016/m2ma1r-iibx
dc.identifier.citationElizabeth M. Middleton, James E. McMurtrey III, Petya K. Entcheva Campbell, Lawrence A. Corp, L. Maryn Butcher, and Emmett W. Chappelle "Optical and fluorescence properties of corn leaves from different nitrogen regimes", Proc. SPIE 4879, Remote Sensing for Agriculture, Ecosystems, and Hydrology IV, (17 March 2003); https://doi.org/10.1117/12.463087en_US
dc.identifier.urihttps://doi.org/10.1117/12.463087
dc.identifier.urihttp://hdl.handle.net/11603/28661
dc.language.isoen_USen_US
dc.publisherSPIEen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.relation.ispartofUMBC Geography and Environmental Systems Department
dc.relation.ispartofUMBC GESTAR II
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleOptical and fluorescence properties of corn leaves from different nitrogen regimesen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0002-0505-4951en_US

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