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231223s2003 xx ||||| 00| ||eng c |
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|a (NLM)14664221
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a McGilloway, R L
|e verfasserin
|4 aut
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|a Nitrification in a zeoponic substrate
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|c 2003
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 05.02.2004
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|a Date Revised 30.09.2020
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|a published: Print
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|a Citation Status MEDLINE
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|a Clinoptilolite is a zeolite mineral with high cation exchange capacity used in zeoponic substrates that have been proposed as a solid medium for growing plants or as a fertilizer material. The kinetics of nitrification has not been measured for NH4+ saturated zeoponic substrate. Experiments were conducted to evaluate the production of NO2- and NO3-, and nitrifier populations in zeoponic substrates. Small columns were filled with zeoponic substrate inoculated with a commercial inoculum or soil enrichment culture of nitrifying bacteria. In addition to column studies, a growth chamber study was conducted to evaluate the kinetics of nitrification in zeoponic substrates used to grow radishes (Raphanus sativus L.). The zeoponic substrate provided a readily available source of NH4+, and nitrifying bacteria were active in the substrate. Ammonium oxidation rates in column studies ranged from 5 to 10 micrograms N g-1 substrate h-1, and NO2- oxidation rates were 2 to 9.5 micrograms N g-1 substrate h-1. Rates determined from the growth chamber study were approximately 1.2 micrograms N g-1 substrate h-1. Quantities of NH4+ oxidized to NO2- and NO3- in inoculated zeoponic substrate were in excess of plant up-take. Acidification as a result of NH4+ oxidation resulted in a pH decline, and the zeoponic substrate showed limited buffering capacity
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|a Comparative Study
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a NASA Center JSC
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|a NASA Discipline Life Support Systems
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|a Non-NASA Center
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|a Culture Media
|2 NLM
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|a Nitrates
|2 NLM
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|a Nitrites
|2 NLM
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| 650 |
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|a Quaternary Ammonium Compounds
|2 NLM
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| 650 |
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|a clinoptilolite
|2 NLM
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| 650 |
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|a 12173-10-3
|2 NLM
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| 650 |
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|a Zeolites
|2 NLM
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| 650 |
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|a 1318-02-1
|2 NLM
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| 650 |
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|a Nitrogen
|2 NLM
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| 650 |
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|a N762921K75
|2 NLM
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| 700 |
1 |
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|a Weaver, R W
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ming, D W
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Gruener, J E
|e verfasserin
|4 aut
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| 700 |
1 |
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|a McGilloway, R L
|e investigator
|4 oth
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| 700 |
1 |
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|a Ming, D W
|e investigator
|4 oth
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| 773 |
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|i Enthalten in
|t Plant and soil
|d 1998
|g 256(2003), 2 vom: 01. Okt., Seite 371-8
|w (DE-627)NLM098181726
|x 0032-079X
|7 nnns
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| 773 |
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|g volume:256
|g year:2003
|g number:2
|g day:01
|g month:10
|g pages:371-8
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|a AR
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|d 256
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|h 371-8
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