NITROGEN DEFICIENCY: In Bark

Ailments Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin over 4 years ago.

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The function of organisms; leaf coloring significance; growth; correction; for analysis, refer to A67-472+
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More The Orchid Doctor Articles under the Heading Nitrogen

Nitrogen Comments
NITROGEN: Ammoniacal Source Urea nitrogen is not as readily usable as ammoniacal nitrogen and ammonium nitrate was added to a commercial fertilizer before application. OIE-RMH 0
NITROGEN: Best Amount for Cattleyas For cattleyas grown in glass marbles 50 ppm. is good; optimal is 100 ppm. equivalent to 4.5 oz. of ammonium nitrate in 100 gals, water, quite low; one oz. in 7,830 gals, is 1 ppm. C72-223; OA79-129; OR74-135 0
NITROGEN: Function as Fertilizer Large amounts are required for continued production of new cells. AU75-45Used by the plant to make healthy green leaves and stems; it promotes strong green foliage. A70-139Used in excess of requirements it causes plants to grow soft and dark green; will not produce good flowers; bifoliate cattleyas such as C.Portia and C.Porcia do not require as much nitrogen as the regular unifoliates. A71-400Used in increasing amounts, it is found that dramatic reduction in growth in cattleyas follows an increase in nitrogen levels; possibility of a limiting factor exists. OA79-131+; absolutely wrong. OWD 0
NITROGEN: Optimal Amounts 100 parts ppm. appear to be optimal for phalaenopsis and cymbidiums, for cattleyas, 50ppm. SA85-168 0
NITROGEN: Parts Per Million for Maximum Growth Experiments indicated that 113 or 114 ppm., or approximately 100 ppm., equivalent to 4.5 oz. of ammonium nitrate in 100 gals. water was best. OR74-135 0
NITROGEN: Properties Regardless of application to non-orchids, final form taken up is mostly nitrate, readily absorbed by roots; readily leached from soil; forms no insoluble complexes. OD67-219; this does not hold for most orchids -- NH4 is used as readily as N03. OWD 0
NITROGEN SHOCK: Reducing Nitrogen Sharply in August In the Midwest, where cool August nights seldom occur, buds can be initiated for winter flowering by the reduction of nitrogen; applied to cymbidiums. A67-12 0
NITROGEN: The Most Important Element It needs traces of molybdenum for its assimilation by plants; it has an effective range from pH 5 to 9; below or above that, the plant is unable to use it sufficiently. OA78-50; no, this is not true. OWD 0

New Topics

  1. Rae Walker asked question Dendrobium No I’d. HELP! in category Dendrobiums
  2. John Hyatt asked question Deformed growths on BLC King of Taiwan in category Cattleya Alliance
  3. Darrin Duling asked question Unidentified Bratonia in category General Discussion
  4. Armando Mantellini started topic Cattleya jenmanii missing awards in category Cattleya Alliance
  5. Darrin Duling asked question Phragmipedium Cape Sunset or Eric Young? in category Paph Alliance

New Comments

  1. Carol Holdren commented on topic "Dendrobium No I’d. HELP!" by Rae Walker
  2. Carol Holdren commented on article "CATTLEYAS: Control of Blooming Time" by Robert M. [Bert] Hamilton (Compiler)
  3. Carol Holdren commented on member plant Lc. Nice Holiday 'Suntopia' by William Gorski
  4. Robert H. Findlay commented on topic "Phragmipedium Cape Sunset or Eric Young?" by Darrin Duling
  5. Robert H. Findlay commented on member plant Phrag. Ecuagenera Dream by Robert H. Findlay
  6. Tatjana Opekunova commented on article "CATTLEYAS: Reasons for Non-flowering" by Robert M. [Bert] Hamilton (Compiler)
  7. Carol Holdren commented on member plant Zygopetalum var. Big Red One by Wyatt Parker
  8. Carol Holdren commented on topic "Need ID, Please" by Oliver Quin Surco
  9. Sara D commented on member plant Phal. bellina var. Coerulea by Sara D
  10. Debbie Chase commented on topic "Identify This Orchid " by Debbie Chase
  11. Andrew Chan commented on member plant V. Yano Blue var. Ploenpit by Mary Lane
  12. William Gorski commented on member plant Alcra. Tropic Lily 'Hilo Space Ship' by Mary Lane
  13. Osura Mindula Gunasena commented on topic "Help to Identify the Id of this Vanda" by Osura Mindula Gunasena
  14. Renee Hawes commented on member plant Phal. I-Hsin Spot Eagle var. I-Hsin Spot Eagle 'Montclair' AM/AOS 'Ta-Lin Spot x Black Eagle' by Renee Hawes
  15. Renee Hawes commented on member plant Phal. Liu's Berry by Renee Hawes
  16. Renee Hawes commented on member plant Phal. Yushan Christopher var. Harlequin 'Little Panda' by Renee Hawes
  17. Carol Holdren commented on topic "How to repot a Mattie Shave" by Pam Alexander
  18. Frank Cambas commented on member plant Zns. Cynosure var. Blue birds by Ben MG
  19. Robert H. Findlay commented on topic "Lady Bug or dangerous bug" by John Small
  20. Robert H. Findlay commented on topic "Help with ID of this Eria sp." by Robert H. Findlay