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Is Nitrate Necessary to Biological Life Support?
Technical Paper
1999-01-2026
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Urea is 85% of the recycled nitrogen in a life support system. Urea is quickly converted to NH4+ but nitrification to NO3− is difficult. Supplying NH4+ directly to plants eliminates the need for a nitrifying bioreactor. Most plant physiology textbooks indicate that NH4+ is toxic to plants, but we now know that this may not be true if pH is rigorously controlled. However, the long-term effects of high NH4+/ NO3− uptake ratios are poorly understood. In four studies, two cultivars of wheat were grown to maturity with NH4+/ NO3− ratios from 0 to 0.85 in recirculating hydroponic solution. In the third and fourth studies, NH4+ was supplied as (NH4)2SO4, NH4CI, or both. Contrary to conventional wisdom, there was no beneficial effect of supplying 25% of the N as NH4+ compared to a nitrate control. The high NH4+ treatment (85% NH4+) reduced seed yield by 20% in the first two studies, but yield was not reduced in the third and fourth studies. Increasing calcium and potassium supply in the nutrient solution appears to be critical to ameliorating the detrimental effects of NH4+. Seed protein concentration was increased from 17 to 22% at the highest NH4+ level. These studies indicate that it may be possible to eliminate the need to recycle N as NO3− in regenerative life support systems.
Authors
Citation
Muhlestein, D., Hooten, T., Koenig, R., Grossl, P. et al., "Is Nitrate Necessary to Biological Life Support?," SAE Technical Paper 1999-01-2026, 1999, https://doi.org/10.4271/1999-01-2026.Also In
References
- Marschner, H. 1995 Mineral nutrition of higher plants Academic Press San Diego
- Lea-Cox, J.D. Stutte, G.W. Berry, W.L. Wheeler. R.M. 1999 Nutrient dynamics and pH/charge-balance relationships in hydroponic solutions Acta Hort 481 241 249
- Gentry, L.E. Wang, X.T. Below. F.E. 1989 Nutrient uptake by wheat seedlings that differ in response to mixed nitrogen nutrition Journal of Plant Nutrition 12 363 373
- Alan R. 1989 The effect of nitrogen nutrition on growth chemical composition, and response of cucumbers ( Cucumis sativus L.) to nitrogen forms in solution culture Journal of Horticultural Science 64 467 474
- Maynard, D.N. Barker. A.V. 1969 Studies on the tolerance of plants to ammonium nutrition J. Am. Soc. Hort. Sci 92 537 542
- Peet, M.M. Raper, CD. Jr. Tolley, L.C. Robarge W.P. 1985 Tomato responses to ammonium and nitrate under controlled root-zone pH Journal of Plant Nutrition 8 787 798
- Henry, L.T. Raper. C.D. Jr. 1989 Effects of root-zone acidity on utilization of nitrate and ammonium in tobacco plants Journal of Plant Nutrition 12 811 826
- Koenig, R.T. Pan. W.L. 1996 Chloride enhancement of wheat response to ammonium nutrition Soil Science Society of America Journal 60 498 505
- Wydeven, T.W. Golub. M.A. 1990 Generation rates and chemical compositions of waste streams in a typical crewed space habitat NASA TM-102799
- Moat, A.G. Foster. J.W. 1988 Nitrogen metabolism In Microbial physiology New York Wiley-Inter-science
- Strayer, R.F. Finger, B.W. Alzaraki. M.K. 1996 Evaluation of an anaerobic digestion system for processing CELSS crop residues for resource recovery Adv. Space Res. 19
- Cox, W.J. Reisenauer. H.M. 1973 Growth and ion uptake by wheat supplied nitrogen as nitrate, ammonium, or both Pl. Soil 38 363 380
- Magalhaes, J.R. Wilcox. G.E. 1983 Tomato growth and mineral composition influenced by nitrogen form and light intensity Journal of Plant Nutrition 6 847 862
- Ajayi, O. Maynard, D.N. Barker. A.V. 1970 The effect of potassium on ammonium nutrition of tomato ( Lycopersicum esculentum Mill) Agronomy Journal 62 818 821
- Maynard, D.N. Barker, A.V. Lachman. W.H. 1968 Influence of potassium on the utilization of ammonium by tomato plants Agronomy Journal 70 1027 1032
- Smart, D.R. Ritchie, K. Bloom, A.J. Bug-bee. B.B. 1998 Nitrogen balance for wheat canopies ( Triticum aestivum cv. Veery-10) grown under elevated and ambient CO 2 concentrations Plant, Cell and Environment 21 753 763