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Development of an Empirically Based Wheat Model for the Johnson Space Center's RLSS Test Bed
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English
Abstract
The design and operation of hybrid physical/chemical and biological life support systems for space application is a complex and difficult process. This paper describes the approach and results of an effort to characterize wheat growth, under various environmental conditions, at the Johnson Space Center's (JSC) Ambient Pressure Growth Chamber (APGC). Using a designed experiment, a test plan was developed for varying environmental parameters during a wheat growth experiment. The test plan was developed using a Central Composite approach to experimental design. As a result of the experimental runs, an empirical model of both the transpiration process and carbon dioxide assimilation for wheat growth over specified ranges of environmental parameters has been developed. The environmental parameters include carbon dioxide concentration, ambient chamber temperature, vapor pressure deficit, and air velocity. In addition, this model is sensitive enough to predict transpiration and carbon dioxide assimilation for different ages of the plant canopy.
Authors
Citation
Edeen, M. and Miller, A., "Development of an Empirically Based Wheat Model for the Johnson Space Center's RLSS Test Bed," SAE Technical Paper 941597, 1994, https://doi.org/10.4271/941597.Also In
References
- McDonnell Douglas Space Systems Company “Regenerative Life Support System Testing, Modeling, and Database Development: Final Report” contract NAS9-17885, task order no. 5.17.1 R1, Document no. MDC 91H0222 McDonnell Douglas Space Systems Company Huntington Beach, California September 1991
- McDonnell Douglas Corporation “Regenerative Life Support System Testing, Modeling, and Database Development: Final Report” contract NAS9-17885, task order no. 5.17.2.1, Document no. MDC 92H0936 McDonnell Douglas Space Systems Company Huntington Beach, California September 1992
- Bugbee, B. G. “Determining the Potential Productivity of Food Crops in Controlled Environments” Adv. in space Research 1992
- Bugbee, B. G. Salisbury, F. B. “Current and Potential Productivity of Wheat for a Controlled Environment Life Support System” Adv. Space Research 9 8 5 15 1989