Skip to main content Accessibility help
×
×
Home

Comparison of the effects of nitrogen fertilizer on the yield, nitrogen content and quality of 21 different vegetable and agricultural crops

  • D. J. Greenwood (a1), T. J. Cleaver (a1), Mary K. Turner (a1), J. Hunt (a1), K. B. Niendorf (a1) and S. M. H. Loquens (a1)...

Summary

The effect of level of N fertilizer on the composition, yield and quality of 21 crops was studied in experiments on adjacent sites of the same field to aid in the development of fertilizer recommendations.

Yield of each of the crops first increased and then either remained the same or declined with further increases of N fertilizer. Interpretation by means of a simple model enabled response curves to be characterized by two parameters; one representing the beneficial component of the response and the other the detrimental component. Both varied greatly from crop to crop.

The magnitude of the beneficial component of the response of most non-leguminous crops was largely determined by the potential demand of the crop for nitrogen; the exceptions were some root crops which responded less than would be expected on this basis. The adverse component was serious with root crops and those crops that are in the soil for only a short period. High levels of N increased the ratio of foliage to storage root dry weights even when total dry matter was unaffected. The changes were associated with a considerable increase in the % N in the dry matter of the roots.

When crops were grown with their optimum levels of N fertilizer a simple linear. relationship between the mean %N in the dry matter and the total weight of dry matter per unit area covered all crops. Simple relationships also existed between total dry matter of non-leguminous crops and (a) the amount of N taken up by the crop from unfertilized soil, (b) the recovery of added fertilizer by the crop and (c) the beneficial component of the response of crops harvested before October.

Percentage N in the dry matter at harvest was not a sensitive indicator of the extent to which plant growth was restricted by lack of nitrogen; a difference of 0·1% N in the plant material was associated with a 10% increase in yield.

N fertilizer levels influenced the % dry matter and the incidence of crop disorders such as rotten roots and tissue discoloration, but the effects were seldom appreciable with practicable levels of fertilizer application.

Copyright

References

Hide All
Barnes, A. (1979 a). Vegetable plant part relationships. II. A quantitative hypothesis for shoot/storage root development. Annals of Botany 43, 487499.
Barnes, A. (1979 b). Vegetable plant part relationships. IV. An interpretation of growth regulator experiments with root crops. Annals of Botany 43, 513522.
Benton, Jones J. Jr (1969). Elemental analyses of plant leaf tissue by several laboratories. Journal of the Association of Official Analytical Chemists 52, 900903.
Boote, K. J. (1976). Boot:shoot relationships. Soil and Crop Science Society of Florida Proceedings 36, 1523.
Bradstreet, R. B. (1965). The Kjeldahl Method for Organic Nitrogen. New York: Academic Press.
Draycott, A. P. (1972). Sugar-beet Nutrition. London: Applied Science Publishers.
Gerwitz, A. & Page, E. R. (1974). An empirical mathematical model to describe plant root systems. Journal of Applied Ecology 11, 773781.
Greenwood, D. J., Cleaver, T. J., Turner, M. K., Hunt, J., Niendorf, K. B. & Loquens, S. M. H. (1980 a). Comparison of the effects of potassium fertilizer on the yield, potassium content and quality of 22 different vegetable and agricultural crops. Journal of Agricultural Science, Cambridge 95, 441456.
Greenwood, D. J., Cleaver, T. J., Turner, M. K., Hunt, J., Niendorf, K. B. & Loquens, S. M. H. (1980 b). Comparison of the effects of phosphate fertilizer on the yield, phosphate content and quality of 22 different vegetable and agricultural crops. Journal of Agricultural Science, Cambridge 95, 457469.
Metivier, J. R. & Dale, J. E. (1977). The effects of grain nitrogen and applied nitrate on growth, photosynthesis and protein content of the first leaf of barley cultivars. Annals of Botany 41, 12871296.
Ministry of Agriculture, Fisheries and Food (1975). General laboratory services booklet No. 2. Lime and fertilizer recommendations for vegetables and bulbs based on soil analysis SBN 11 2405096. London: Her Majesty's Stationery Office.
Penning De, Vries F. W. T. (1975 a). Use of assimilates in higher plants. In Photosynthesis and Productivity in Different Environments (ed. Cooper, J. P.), pp. 459480. Cambridge University Press.
Penning De, Vries F. W. T. (1975 b). The cost of maintenance processes in plant cells. Annals of Botany 39, 7792.
Scaife, M. A. & Bray, B. G. (1977). Quick sap tests for improved control of crop nutrient status. ADAS Quarterly Review 27, 137145.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

The Journal of Agricultural Science
  • ISSN: 0021-8596
  • EISSN: 1469-5146
  • URL: /core/journals/journal-of-agricultural-science
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed