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Browsing by Person "Koch, Inge"

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    Erfassung klimarelevanter Spurengase

    Klimatisierte Plexiglaskammern zur Messung von Bodenatmung und Spurengasen in ungestörten Pflanzenbeständen

    (2001) Motz, Ilona; Koch, Inge; Kutzbach, Heinz Dieter; Stahr, Karl
    Verschiedenste anthropogene Ursachen tragen zur Erhöhung des Treibhauseffektes bei. Kohlendioxid aus landwirtschaftlich genutzten Flächen spielt dabei eine wesentliche Rolle. ?oeblicherweise werden zur Quantifizierung der CO2-Mengen aus dem System Pflanze - Boden Kammer- Verfahren angewandt. Probleme bereiten hierbei Kammereffekte, die vor allem in einer Temperaturerhöhung sowie in einer Verminderung des photosynthetisch aktiven Lichts zu sehen sind. Daher wurde in der vorliegenden Untersuchung ein Meßsystem entwickelt, bei dem diese Effekte minimiert werden können. Grundlage der Messungen bildet die in Hohenheim entwickelte geschlossene Meßkammer, wobei diese in der vorliegenden Arbeit um Hauben aus Plexiglas sowie eine Kühlung erweitert wurde.
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    Measurement of Greenhouse Gases

    Air-Conditioned Perspex Chambers for the Measurement of Soil Respiration and Trace Gases in Undisturbed Plant Populations

    (2001) Motz, Ilona; Koch, Inge; Kutzbach, Heinz Dieter; Stahr, Karl
    Various anthropogenic causes contribute to the increasing greenhouse effect. Carbon dioxide from agricultural areas plays a significant role in this respect. Usually, chamber methods are used for the quantification of CO2 from the plant-soil system. This leads to problems caused by cham- ber effects which are primarily seen in a temperature increase and a re- duction in the amount of photosynthetically active light; therefore, a measuring system was developed during the present investigation which allows these effects to be minimized. These measurements are based on the closed measuring chamber developed in Hohenheim, which, during the present study, was extended to comprise Perspex covers and air con- ditioning.

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