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Lacer-induced Chlorophyll Fluorescence - a Tool for Online Detecting Nitrogen Status in Crop Stands

Sticksel, E. and Maidl, F.-X. and Schächtl, J. and Huber, G. and Schulz, J. (2001) Lacer-induced Chlorophyll Fluorescence - a Tool for Online Detecting Nitrogen Status in Crop Stands. In: 3rd ECPA Proceedings, pp. 959-964. 3rd European Conference on Precision Agriculture, Montpellier.

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Abstract

The on-line monitoring of crop stands is essential in a system of site specific N application. The chlorophyll fluorescence ratio F685/F730 is correlated with chlorophyll content and nitrogen content. Therefore monitoring the laser-induced chlorophyll fluorescence might be used to assess the N status of plants. During the 2000 growing period field campaigns were done with a hand held device to measure the fluorescence ratio F685/F730. Fluorescence ratio was negative correlated with N content and in late growth stages with N uptake as well. The coefficient of correlation was between r=0.976 (N content in dry matter in EC 30 against fluorescence ratio) and r=0.737 (N uptake in EC 37 against fluorescence ratio). The experiences of the 2000 measuring campaign will be applied for the further improvement of the technical design.

Item URL in elib:https://elib.dlr.de/7879/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2001,
Title:Lacer-induced Chlorophyll Fluorescence - a Tool for Online Detecting Nitrogen Status in Crop Stands
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Sticksel, E.UNSPECIFIEDUNSPECIFIED
Maidl, F.-X.UNSPECIFIEDUNSPECIFIED
Schächtl, J.UNSPECIFIEDUNSPECIFIED
Huber, G.UNSPECIFIEDUNSPECIFIED
Schulz, J.UNSPECIFIEDUNSPECIFIED
Date:2001
Journal or Publication Title:3rd ECPA Proceedings
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 959-964
Editors:
EditorsEmail
Grenier, G.UNSPECIFIED
Blackmore, S.UNSPECIFIED
Status:Published
Event Title:3rd European Conference on Precision Agriculture, Montpellier
Organizer:European Conference on Precision Agriculture
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):UNSPECIFIED
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute
Deposited By: Roehl, Cornelia
Deposited On:16 Sep 2005
Last Modified:06 Jan 2010 22:04

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