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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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.
|Title:||Laser-Induced Chlorophyll Fluorescence Measurements for Detecting the Nitrogen Status of Wheat (Triticum aestivum L.) Canopies|
|Journal or Publication Title:||Precision Agriculture|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 143-156|
|Keywords:||chlorophyll sensor, laser-induced chlorophyll fluorescence, nitrogen, wheat|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EO - Erdbeobachtung|
|DLR - Research area:||Space|
|DLR - Program:||W EO - Erdbeobachtung|
|DLR - Research theme (Project):||UNSPECIFIED|
|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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