The Orchid Doctor Articles under the Heading Photosynthesis

Photosynthesis Comments
PHOTOSYNTHESIS: And Temperatures For every 18 deg.F. (10 deg.C.) rise, the rate of photosynthesis increases from 2.2 to 2.6 times, until 86 F. (30 C.) to 95 F. (35 C.) is reached when no further increase occurs; far above that the rate may decrease. OR72-34 0
PHOTOSYNTHESIS: In Cattleyas They fix CO-two both day and night; the balance point of photosynthesis/food formation is at 200 lux, i.e., food formation is just equal to transpiration, at light intensities from 200 lux to 5000 lux the rate of photqsynthesis increases to its maximum level; in winter the poorer level of light requires that plants be kept at 50 dF (lO dC). OR81-214 0
PHOTOSYNTHESIS: New Growths Stretch Towards the Window To keep plants grow ing upright when they are some distance from the light source rotate them one-quarter turn every two weeks; install Lazy Susans? A83-698 0
PHOTOSYNTHESIS: Rates of Activity It starts functioning at 6 dF; at 62 dF it achieves 60% of full activity; at 70 dF it is 83%, at SO dF it is 100%, at 90 Deg. it is 80%, at lOOd it is 40% and at llOd it does not function. AU87(2)-17 0

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  2. John Hyatt asked question Deformed growths on BLC King of Taiwan in category Cattleya Alliance
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New Comments

  1. Carol Holdren commented on member plant Lc. Nice Holiday 'Suntopia' by William Gorski
  2. Robert H. Findlay commented on topic "Phragmipedium Cape Sunset or Eric Young?" by Darrin Duling
  3. Robert H. Findlay commented on member plant Phrag. Ecuagenera Dream by Robert H. Findlay
  4. Tatjana Opekunova commented on article "CATTLEYAS: Control of Blooming Time" by Robert M. [Bert] Hamilton (Compiler)
  5. Tatjana Opekunova commented on article "CATTLEYAS: Reasons for Non-flowering" by Robert M. [Bert] Hamilton (Compiler)
  6. Carol Holdren commented on member plant Zygopetalum var. Big Red One by Wyatt Parker
  7. Carol Holdren commented on topic "Need ID, Please" by Oliver Quin Surco
  8. Sara D commented on member plant Phal. bellina var. Coerulea by Sara D
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