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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

GC - Pěstování rostlin, osevní postupy

OECD FORD obor

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Projekt

<a href="/cs/project/QI111A133" target="_blank" >QI111A133: Zlepšení využití odrůdového potenciálu obilnin na základě časové a prostorové analýzy spektrálních charakteristik porostu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Poľnohospodárstvo = Agriculture

ISSN

0551-3677

e-ISSN

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Svazek periodika

60

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

10

Strana od-do

50-59

Kód UT WoS článku

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EID výsledku v databázi Scopus

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