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Dynamic control of photosynthetic photon flux for lettuce production in CELSSA new dynamic control of photosynthetic photon flux (PPF) was tested using lettuce canopies growing in the Minitron II plant-growth/canopy gas-exchange system. Canopy photosynthetic rates (Pn) were measured in real time and fedback for further environment control. Pn can be manipulated by changing PPF, which is a good environmental parameter for dynamic control of crop production in a Controlled Ecological Life-Support Systems CELSS. Decision making that combines empirical mathematical models with rule sets developed from recent experimental data was tested. With comparable yield indices and potential for energy savings, dynamic control strategies will contribute greatly to the sustainability of space-deployed CELSS.
Document ID
20040089204
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Chun, C.
(NASA Headquarters Washington, DC United States)
Mitchell, C. A.
Date Acquired
August 21, 2013
Publication Date
December 1, 1996
Publication Information
Publication: Acta horticulturae
Volume: 440
ISSN: 0567-7572
Subject Category
Man/System Technology And Life Support
Funding Number(s)
CONTRACT_GRANT: NAGW-2329
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Life Support Systems
Non-NASA Center

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