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An evaluation of MES (2(N-Morpholino)ethanesulfonic acid) and Amberlite IRC-50 as pH buffers for nutrient solution studiesAll buffering agents used to stabilize pH in hydroponic research have disadvantages. Inorganic buffers are absorbed and may become phytotoxic. Solid carbonate salts temporarily mitigate decreasing pH but provide almost no protection against increasing pH, and they alter nutrient absorption. Exchange resins are more effective, but we find that they remove magnesium and manganese from solution. We have tested 2(N-Morpholino)ethanesulfonic acid (MES) as a buffering agent at concentrations of 1 and 10 mol m-3 (1 and 10 mM) with beans, corn, lettuce, tomatoes, and wheat. MES appears to be biologically inert and does not interact significantly with other solution ions. Relative growth rates among controls and MES treatments were nearly identical for each species during the trial period. The pH was stabilized by 1 mol m-3 MES. This buffer warrants further consideration in nutrient research.
Document ID
20040121540
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Bugbee, B. G.
(Utah State University Logan 84322, United States)
Salisbury, F. B.
Date Acquired
August 22, 2013
Publication Date
January 1, 1985
Publication Information
Publication: Journal of plant nutrition
Volume: 8
Issue: 7
ISSN: 0190-4167
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NCC2-139
Distribution Limits
Public
Copyright
Other

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