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dry matter and nitrogen accumulation are not affected by superoptimal concentration of ammonium in flowing solution culture with ph controlWhile it is known that superoptimal concentrations of the nitrate (NO3-) ion in solution culture do not increase NO3- uptake or dry matter accumulation, the same is not known for the ammonium (NH4+) ion. An experiment was conducted utilizing flowing solution culture with pH control to investigate the influence of superoptimal NH4+ concentrations on dry matter, nitrogen (N), potassium (K), calcium (Ca), and magnesium (Mg) accumulation by nonnodulated soybean plants. Increasing the NH4+ concentration in solution from 1 to 10 mM did not affect dry matter or N accumulation. Accumulations of K, Ca, and Mg were slightly decreased with increased NH4+ concentration. The NH4+ uptake system, which is saturated at less than 1mM NH4+, is able to regulate uptake of NH4+ at concentrations as high as 10 mM.
Document ID
20040121790
Document Type
Reprint (Version printed in journal)
Authors
Rideout, J. W.
(Clemson University Florence, SC 29501-9603, United States)
Raper, C. D. Jr
Raper CD, J. r.
Date Acquired
August 22, 2013
Publication Date
January 1, 1994
Publication Information
Publication: Journal of plant nutrition
Volume: 17
Issue: 1
ISSN: 0190-4167
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: 2-101
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Life Support Systems
NASA Program CELSS
NASA Discipline Number 61-10
Non-NASA Center