Changes in vertical distribution of spectral reflectance within spring barley canopy as an indicator of nitrogen nutrition, canopy structure and yield parameters.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F14%3A00228274" target="_blank" >RIV/62156489:43210/14:00228274 - isvavai.cz</a>
Result on the web
<a href="http://www.degruyter.com/view/j/agri.2014.60.issue-2/agri-2014-0006/agri-2014-0006.xml" target="_blank" >http://www.degruyter.com/view/j/agri.2014.60.issue-2/agri-2014-0006/agri-2014-0006.xml</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.2478/agri-2014-0006" target="_blank" >10.2478/agri-2014-0006</a>

Result language
angličtina
Original language name
Changes in vertical distribution of spectral reflectance within spring barley canopy as an indicator of nitrogen nutrition, canopy structure and yield parameters.
Original language description
The main objective of this study was to evaluate the spectral reflectance in the vertical profile of spring barley canopy at the booting growth stage and to determine how the reflectance gradient changes in relation to crop density and nitrogen (N) nutrition. Vertical gradients of spectral reflectance were studied in field trials with three sowing densities (2, 4 and 6 million of germinating seeds/ha)and two levels of N nutrition (0 and 90 kg/ha). It was found that differences in vegetation indices caused by N nutrition are most pronounced in the second and third leaf from the top, and these increase with increasing sowing density. The vertical gradient of reflectance, specifically the ratio between the leaves F-3/F-1 for vegetation indices based on red-edge reflectance, represents a reliable indicator of number of ears per area unit (R = --0.87 for Normalised Red Edge-Red Index (NRERI) and --0.93 for Zarco-Tejada and Miller Simple Ratio Index (ZM)). A close relationship to ear product
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
GC - Plant growing, crop rotation
OECD FORD branch
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Project
<a href="/en/project/QI111A133" target="_blank" >QI111A133: Improvement of cereal variety potential realisation using temporal and spatial analysis of stand spectral characteristic</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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