Summary
1. The effect of ammonium-nitrogen on the further growth and activity in fixation of nodules already present at the commencement has been studied inCasuarina cunninghamiana growing in water culture and inCeanothus velutinus var.laevigatus in Peralite culture.
2. In Casuarina, at a low level of ammonium-nitrogen nodule growth remained similar to that in plants in nitrogen-free solution, but was stimulated in Ceanothus. In both genera nodule growth was strongly retarded at higher levels.
3. Fixation of nitrogen fell continuously in Casuarina as the level of ammonium-nitrogen was increased, while that in Ceanothus was unaffected at a low level but markedly decreased at a higher one. These effects were compounded from the changes noted in 2 and a tendency for the efficiency of nodule tissues in fixation to fall in the presence of ammonium-nitrogen, though this was not always shown.
4. In both genera but especially in Casuarina the growth of plants entirely dependent on nodule nitrogen was inferior to that of plants additionally supplied with ammonium-nitrogen. The reasons are discussed.
5. The results indicate the effects likely to be produced in the field as the soil nitrogen level rises through the action of the nodules of these species.
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References
Bond, G., Some features of root growth in nodulated plants ofMyrica gale L. Ann. Botany (London)16, 467–475 (1952).
Bond, G., The development and significance of the root nodules ofCasuarina. Ann. Botany (London)21, 373–380 (1957).
Bond, G., The oxygen relation of nitrogen fixation in root nodules. Z. allg. Mikrobiol.1, 93–99 (1961).
Bond, G., Nitrogen fixation in some non-legume root nodules. Phyton (Buenos Aires)24, 57–66 (1967).
Crocker, R. L. and Major, J., Soil development in relation to vegetation and surface age at Glacier Bay, Alaska. J. Ecol.43, 427–448 (1955).
Dommergues, Y., Evaluation du taux de fixation de l'azote dans un sol dunaire reboise en filao (Casuarina equisetifolia). Agrochimica7, 335–340 (1963).
Gibson, A. H., The carbohydrate requirements for symbiotic nitrogen fixation: a ‘whole-plant’ growth analysis approach. Australian J. Biol. Sci.19, 499–515 (1966).
Hewitt, E. J., Sand and Water Culture Methods used in the Study of Plant Nutrition. 2nd edn. Commonwealth Agricultural Bureaux, Farnham Royal, Bucks., England (1966).
Lawrence, D. B., Schoenike, R. E., Quispel, A. and Bond, G., The role ofDryas drummondii in vegetation development following ice recession at Glacier Bay, Alaska, with special reference to its nitrogen fixation by root nodules. J. Ecol.55, 793–813 (1967).
Methods of Analysis of the Association of Official Agricultural Chemists, ed. H. A. Lepper, 8th edn. Washington D.C. (1955).
Russell, S. A. and Evans, H. J., The nitrogen-fixing capacity ofCeanothus velutinus. Forest Sci.12, 164–169 (1966).
Stewart, W. D. P., The effect of combined nitrogen on growth and nodule development ofMyrica andCasuarina. Z. allg. Mikrobiol.3, 152–156 (1963).
Stewart, W. D. P. and Bond, G., The effect of ammonium nitrogen on fixation of elemental nitrogen inAlnus andMyrica. Plant and Soil14, 347–359 (1961).
Wollum, A. G. II and Youngberg, C. T., The influence of nitrogen fixation by non-leguminous woody plants on the growth of pine seedlings. J. Forestry62, 316–321 (1964).
Zavitkovski, J. and Newton, M., Effect of organic matter and combined nitrogen on nodulation and nitrogen fixation in red alder.In: ‘Biology of Alder’, ed. Trappe, J. M.et al., Portland, Oregon. 292 pp. (1968).
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Rodriguez-Barrueco, C., Mackintosh, A.H. & Bond, G. Some effects of combined nitrogen on the nodule symbioses of Casuarina and Ceanothus. Plant Soil 33, 129–139 (1970). https://doi.org/10.1007/BF01378205
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DOI: https://doi.org/10.1007/BF01378205