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Photoperiod shift effects on yield characteristics of riceEdible yield must be maximized for each crop species selected for inclusion in the Controlled Ecological Life-Support System (CELSS) proposed by NASA to support long-term manned space missions. In a greenhouse study aimed at increasing biomass partitioning to rice (Oryza sativa L.) grain, plants of the high yielding semi-dwarf rice cultivar Ai-Nan-Tsao were started in pots under 8-h photoperiods at a density of 212 plants m-2. After different periods of time under 8-h photoperiods, pots were switched to continuous light for the remainder of the cropping cycle. Continuous light did not delay time to first panicle emergence (60 d) or time to harvest (83 d). There was a positive correlation between the length of continuous light treatments and nongrain biomass. Grain yield (1.6 +/- 0.2 g plant-1) did not increase in continuous light. Yield-efficiency rate (grain weight per length of cropping cycle, canopy volume, and weight of nongrain shoot biomass) was used to compare treatments. Small Ai-Nan-Tsao rice canopies grown under 8-h photoperiods were more efficient producers of grain than canopies grown under continuous light for a portion of the rice cropping cycle.
Document ID
20040089442
Document Type
Reprint (Version printed in journal)
Authors
Volk, G. M. (Cornell University Ithaca, NY 14853, United States)
Mitchell, C. A.
Date Acquired
August 21, 2013
Publication Date
November 1, 1995
Publication Information
Publication: Crop science
Volume: 35
Issue: 6
ISSN: 0011-183X
Subject Category
Man/System Technology and Life Support
Funding Number(s)
CONTRACT_GRANT: NAGW-2329
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Life Support Systems