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Laser-Induced Chlorophyll Fluorescence Measurements for Detecting the Nitrogen Status of Wheat (Triticum aestivum L.) Canopies

Schächtl, J. and Huber, G. and Maidl, F.-X. and Sticksel, E. and Schulz, Jürgen and Haschberger, Peter (2005) Laser-Induced Chlorophyll Fluorescence Measurements for Detecting the Nitrogen Status of Wheat (Triticum aestivum L.) Canopies. Precision Agriculture, 6 (2), pp. 143-156.

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Official URL: http://www.springerlink.com/media/H07C7HXYMJ697TMXCD4P/Contributions/X/J/8/L/XJ8L511016318113.pdf

Abstract

The objective of this study was to assess the suitability of laser-induced chlorophyll fluorescence measurements to detect the nitrogen (N) supply of wheat (Triticum aestivum L.) at canopy level under ambient conditions. In 2002, a plot trial was carried out as a randomised block design. Increasing amounts of N fertiliser were applied to induce variations in the N uptake of the canopies. Different cultivars with varying growth habit and leaf colour were chosen to cover a wide range of canopy characteristics. Biomass was harvested at characteristic growth stages to determine aboveground dry matter yield, N concentration in dry matter and N uptake. Measurements with a hand-held chlorophyll sensor showed a strong correlation between the sensor signal and the N uptake thus indicating that the system is suitable for assessing the nutritional status of the plants. A clear differentiation between the N treatments was evident even at the beginning of stem elongation. The cultivar and the growth stage significantly influenced the sensor signal. Both factors need to be considered when predicting the N uptake of the canopy using laser-induced chlorophyll fluorescence measurements.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2005,
Title:Laser-Induced Chlorophyll Fluorescence Measurements for Detecting the Nitrogen Status of Wheat (Triticum aestivum L.) Canopies
Authors:
AuthorsInstitution or Email of Authors
Schächtl, J.TU München
Huber, G.TU München
Maidl, F.-X.TU München
Sticksel, E.TU München
Schulz, JürgenUNSPECIFIED
Haschberger, PeterUNSPECIFIED
Date:2005
Journal or Publication Title:Precision Agriculture
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:6
Page Range:pp. 143-156
Status:Published
Keywords:chlorophyll sensor, laser-induced chlorophyll fluorescence, nitrogen, wheat
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:01 Feb 2006
Last Modified:06 Jan 2010 22:40

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