Effects of radiation quality, intensity, and duration on photosynthesis and growth
- Utah State Univ., Logan, UT (United States)
Differences in radiation quality from the six most common electric lamps have little effect on photosynthetic rate. Radiation quality primarily alters growth because of changes in branching or internode elongation, which change radiation absorption. Growth and yield in wheat appear to be insensitive to radiation quality. Growth and yield in soybeans can be slightly increased under high pressure sodium lamps compared to metal halide lamps, in spite of greatly reduced chlorophyll concentrations under HPS lamps. Daily integrated photosynthetic photon flux (mol m{sup -2} d{sup -1}) most directly determines leaf anatomy and growth. Photosynthetic photon flux levels of 800 {mu}mol m{sup -2} s{sup -1} are adequate to simulate field daily-integrated PPF levels for both short and long day plants, but plant canopies can benefit from much higher PPF levels.
- Research Organization:
- Univ. of Wisconsin, Madison, WI (United States)
- OSTI ID:
- 62362
- Report Number(s):
- CONF-9403214-; ON: DE95008170; TRN: 95:004109-0005
- Resource Relation:
- Conference: International lighting in controlled environments workshop, Madison, WI (United States), 27-30 Mar 1994; Other Information: PBD: [1994]; Related Information: Is Part Of International lighting in controlled environments workshop: Proceedings; PB: 393 p.
- Country of Publication:
- United States
- Language:
- English
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