Author
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Krizek, Donald |
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Submitted to: International Controlled Environment Workshop Proceedings
Publication Type: Abstract Only Publication Acceptance Date: 9/9/2001 Publication Date: 9/15/2000 Citation: KRIZEK, D.T. REPORTING AND MONITORING FOR DIAGNOSTIC PURPOSES. INTERNATIONAL CONTROLLED ENVIRONMENT WORKSHOP PROCEEDINGS. ABSTRACT. 2000. Interpretive Summary: NOT REQUIRED Technical Abstract: In order to conduct meaningful studies in controlled environments, it is important that researchers and facility managers have a clear idea as to the cultural conditions to be utilized, the environmental parameters to be monitored and controlled, the type and location of sensors, and the frequency of measurements to be made. Previously published guidelines should be consulted for guidance in standardizing the type and location of environmental sensors in the growth chamber. Ideally, a check list of cultural and environmental conditions and log book should be kept and careful notes recorded whenever problems are observed or adjustments in set points are made. These records should provide a valuable diagnostic tool in deciding when to make adjustments in control settings and in interpreting any unexpected results in plant response. For most studies, the most critical parameters to control and record are photosynthetic photon flux, air temperature, and atmospheric moisture. In many cases, carbon dioxide concentration, spectral distribution, and soil temperature are also essential. For solution culture experiments, it is important to have good records of hydrogen ion concentration, electrical conductivity, and dissolved oxygen. Ideally, measurements of radiation, temperature, atmospheric moisture, CO2, and air velocity should be taken at the top of the plant canopy. To ensure accuracy, researchers should have access to within-lab and reference calibrators. To facilitate an intercomparison of data, environmental measurements should be reported in SI units. |
