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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.

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 Authors
Sticksel, E.UNSPECIFIED
Maidl, F.-X.UNSPECIFIED
Schächtl, J.UNSPECIFIED
Huber, G.UNSPECIFIED
Schulz, J.UNSPECIFIED
Date:2001
Journal or Publication Title:3rd ECPA Proceedings
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: Cornelia Roehl
Deposited On:16 Sep 2005
Last Modified:06 Jan 2010 22:04

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