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Carbon dioxide and water exchange of a soybean stand grown in the biomass production chamberSoybean plants were grown under metal halide lamps in NASA's biomass production chamber (BPC). Experiments were conducted to determine whole stand rates of carbon dioxide exchange and transpiration as influenced by time of day, CO2 concentration, irradiance, and temperature. Plants were grown at a population of 24 plants/sq m, a daily cycle of 12 hr light/12 hr dark, and average temperature regime of 26 C light/20 C dark, and a CO2 concentration enriched and maintained at 1000 ppm during the photoperiod. A distinct diurnal pattern in the rate of stand transpiration was measured at both ambient and enriched (1000 ppm) concentration of CO2. Data generated in this study represent true whole stand responses to key developmental and environmental variables and will be valuable in database construction for future working CELSS. Crop growth studies in the BPC were conducted with a high degree of environmental control, gas tightness during growth, and have used large plant stands. These characteristics have placed it in a unique position internationally as a research tool and as a preprototype subcomponent to a fully integrated CELSS. The results from the experiments are presented.
Document ID
19910010713
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Corey, Kenneth A. (Massachusetts Univ. Amherst, MA, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1990
Publication Information
Publication: NASA, John F. Kennedy Space Center, Research Reports: 1990 NASA(ASEE Summer Faculty Fellowship Program
Subject Category
Life Sciences (General)
Accession Number
91N20026
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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