Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-20T02:30:03.619Z Has data issue: false hasContentIssue false
  • English
  • Français

Nitrogen Nutrition of Cowpea (Vigna unguiculata)

III. Distribution of Nitrogen Within Effectively Nodulated Plants*

Published online by Cambridge University Press:  03 October 2008

A. R. J. Eaglesham ,
F. R. Minchin ,
R. J. Summerfield ,
P. J. Dart ,
P. A. Huxley  and
J. M. Day
A. R. J. Eaglesham
Affiliation:
University of Reading, Department of Agriculture and Horticulture, Plant Environment Laboratory, Shinfield, Reading
F. R. Minchin
Affiliation:
University of Reading, Department of Agriculture and Horticulture, Plant Environment Laboratory, Shinfield, Reading
R. J. Summerfield
Affiliation:
University of Reading, Department of Agriculture and Horticulture, Plant Environment Laboratory, Shinfield, Reading
P. J. Dart
Affiliation:
University of Reading, Department of Agriculture and Horticulture, Plant Environment Laboratory, Shinfield, Reading
P. A. Huxley
Affiliation:
University of Reading, Department of Agriculture and Horticulture, Plant Environment Laboratory, Shinfield, Reading
J. M. Day
Affiliation:
University of Reading, Department of Agriculture and Horticulture, Plant Environment Laboratory, Shinfield, Reading
Get access Rights & Permissions [Opens in a new window]

Summary

Effectively nodulated, pot-grown cowpea plants were irrigated with nutrient solution containing 25 ppm 15N, and the relative contributions to total plant N status of inorganic and nodule-fixed N were determined. Maximum rates of N assimilation occurred during pod-fill, with nodules contributing ten times more nitrogen than the applied source. Symbiotic fixation supplied over 80% of total plant N throughout growth, and contributed significantly to seed N during late pod-fill, when nutrient N assimilation was negligible. Vegetative N content was greatest at mid pod-fill, and mobilization from this 'pool' was equivalent to 44% of total seed N. The implications of these (and previously reported) data are discussed.

Type
Research Article
Information
Experimental Agriculture , Volume 13 , Issue 4 , October 1977 , pp. 369 - 380
Copyright
Copyright © Cambridge University Press 1977

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bhangoo, M. S. & Albritton, D. J. (1976). Agron. J. 68, 642.CrossRefGoogle Scholar
Dart, P. J., Huxley, P. A., Eaglesham, A. R. J., Minchin, F. R., Summerfield, R. J. & Day, J. M. (1977). Expl Agric. (in press).Google Scholar
Hanway, J. J. & Weber, C. R. (1971). Agron. J. 63, 289.Google Scholar
Hardy, R. W. F., Burns, R. C., Hebert, R. R., Holsten, R. O. & Jackson, E. K. (1971). Plant Soil Spec. Vol.561.Google Scholar
Hume, D.J. & Criswell, J. G. (1973). Crop Sci. 13, 519.CrossRefGoogle Scholar
Kollman, G. E., Streeter, J. G., Jeffers, D. L. & Curry, R. B. (1974). Agron. J. 66, 549.CrossRefGoogle Scholar
Lawn, R.J. & Brun, W. A. (1974). Crop Sci. 14, 2.Google Scholar
Lewis, O. A. M. & Pate, J. S. (1973). J. exp. Bot. 24, 596.CrossRefGoogle Scholar
Minchin, F. R., Summerfield, R. J. & Eaglesham, A. R. J. (1977). Trop. Agric., Trin. (in press).Google Scholar
Oghoghorie, C. G. O. & Pate, J. S. (1972). Planta 104, 35.CrossRefGoogle Scholar
Pate, J. S. & Flinn, A. M. (1973). J. exp. Bot. 24, 1090.CrossRefGoogle Scholar
Pulver, E. L. & Wien, H. C. (1977). Grain legume improvement programme (IITA) Rep., 1976, 49.Google Scholar
Sinclair, T. R. & de Wrr, C. T. (1975). Science 189, 565.CrossRefGoogle Scholar
Summerfield, R. J., Dart, P. J., Huxley, P. A., Eaglesham, A. R. J., Minchin, F. R. & Day, J. M. (1977a). Expl Agric. 13, 129.CrossRefGoogle Scholar
Summerfield, R. J., Minchin, F. R., Stewart, K. A. & Ndunguru, B. J. (1977b). Reading Univ. IITA Int. Comm. 16.Google Scholar
Thibodeau, P. S. & Jaworski, E. G. (1975). Planta 127, 133.CrossRefGoogle Scholar