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Nitrogen concentrations in field-grown spring barley: an examination of the usefulness of expressing concentrations on the basis of tissue water

Published online by Cambridge University Press:  27 March 2009

R. A. Leigh  and
A. B. Johnston
R. A. Leigh
Affiliation:
Rothamsted Experimental Station, Harpenden, Hertfordshire, AL5 2JQ
A. B. Johnston
Affiliation:
Rothamsted Experimental Station, Harpenden, Hertfordshire, AL5 2JQ
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Summary

A study was made of growth and N concentrations of field-grown crops of spring barley (Hordeum vulgare L. cv. Georgie or Triumph). Nitrogen concentrations were calculated on the basis of both dry matter and tissue water because previous research had indicated that K concentrations expressed on the basis of tissue water were better for assessing the K status of crops. The aim was to see whether this was also the case for N.

When supplies of P and K were adequate, the addition of N fertilizer stimulated growth in all crops except when sufficient N was already supplied as farmyard manure. Percentage N in dry matter declined as plants grew and was higher in plants given N than in plants grown without N, although the difference diminished with time. Nitrogen concentrations calculated on the basis of tissue water were very similar for both N-sufficient and N-deficient crops despite large differences in growth rates. Nitrogen concentrations in tissue water also declined but only until anthesis, thereafter they increased. This pre-anthesis decline was due to the increase in the amount of stem tissue which had lower N concentrations in tissue water than leaves. Similarly the post-anthesis increase in N concentrations was due to the development of the ears which had high concentrations of N in tissue water.

The effects of deficiencies of P or K or water on N concentrations in tissue water of the cultivars Georgie or Julia were studied also in field experiments at Rothamsted. Lack of P and K inhibited growth of crops given 144 kg N/ha. Crops grown without N grew more slowly than those given N but their growth was not further inhibited by lack of P or K. Deficiencies of either P or K increased N concentrations calculated on the basis of tissue water in crops given 144 kg N/ha but not in crops grown without N. The increase in concentration was not due to changes in the proportions of leaves and stems but to real increases in N concentrations in leaves, stems and ears. Drought decreased growth and also resulted in higher N concentrations in tissue water.

In the absence of other limiting factors, N concentrations expressed on the basis of tissue water were very similar for both N-sufficient and N-deficient crops. They increased only when growth was limited by factors other than N. The implications of this for the control of N concentrations by crops is discussed.

It is concluded that N concentrations expressed on the basis of tissue water are unlikely to be useful for determining the N requirements of barley. Percentage N in dry matter might be more useful for this purpose.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 105 , Issue 2 , October 1985 , pp. 397 - 406
Copyright
Copyright © Cambridge University Press 1985

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References

REFERENCES

Day, W., Legg, B. J., French, B. K., Johnston, A. E., Lawlor, D. W. & Jeffers, W. De C. (1978). A drought experiment using mobile shelters: the effect of drought on barley yield, water use and nutrient uptake. Journal of Agricultural Science, Cambridge 91, 599–623.CrossRefGoogle Scholar
Eskew, D. L., Schradeb, L. E. & Bingham, E. T. (1973). Seasonal patterns of nitrate reductase activity and nitrate concentration of two alfalfa (Medicago sativa L.) cultivars. Crop Science 13, 594–597.CrossRefGoogle Scholar
Gallagher, L., Soliman, K. M., Rains, D. W., Qualset, C. O. & Huffaker, R. C. (1983). Nitrogen assimilation in common wheats differing in nitrate reductase activity and tissue nitrate concentrations. Crop Science 23, 913–919.CrossRefGoogle Scholar
Greenwood, D. J., Babnes, A., Lru, K., Hunt, J., Cleaver, T. J. & Loquens, S. M. H. (1980). Relationships between critical concentrations of nitrogen, phosphorus and potassium in 17 different vegetable crops and duration of growth. Journal of the Science of Food and Agriculture 31, 1343–1353.CrossRefGoogle Scholar
Harper, J. E. & Paulsen, G. M. (1967). Changes in reduction and assimilation of nitrogen during the growth cycle of winter wheat. Crop Science 7, 205–209.CrossRefGoogle Scholar
Hesse, P. R. (1971). A Textbook of Soil Chemical Analysis. London: John Murray (Publishers) Ltd.Google Scholar
Karlen, D. L. & Whitney, D. A. (1980). Dry matter accumulation, mineral concentrations and nutrient distribution in winter wheat. Agronomy Journal 72, 281–288.CrossRefGoogle Scholar
Legg, B. J., Day, W., Brown, N. J. & Smith, G. J. (1978). Small plots and automatic rain shelters: a field appraisal. Journal of Agricultural Science, Cambridge 91, 321–336.CrossRefGoogle Scholar
Leigh, R. A. & Johnston, A. E. (1983a). Concentrations of potassium in the dry matter and tissue water of field-grown spring barley and their relationships to grain yield. Journal of Agricultural Science, Cambridge 101, 675–685.CrossRefGoogle Scholar
Leigh, R. A. & Johnston, A. E. (1983b). The effects of fertilizers and drought on the concentration of potassium in the dry matter and tissue water of field-grown spring barley. Journal of Agricultural Science, Cambridge 101, 741–748.CrossRefGoogle Scholar
Leigh, R. A. & Wyn Jones, R. G. (1984). A hypothesis relating critical potassium concentrations for growth to the distribution and functions of this ion in the plant cell. New Phytologist 97, 1–13.CrossRefGoogle Scholar
Lichfield, M. H. (1967). The automated analysis of nitrite and nitrate in blood. The Analyst 92, 132–136.CrossRefGoogle Scholar
O'Neill, E. J., Batey, T. & Cresser, M. S. (1983a). Assessment of nitrogen status of soils for cereal crops: effects of nitrogen fertiliser on growth, composition and yield of spring barley. Journal of the Science of Food and Agriculture 34, 541–548.CrossRefGoogle Scholar
O'Neill, E. J., Batey, T. & Cresser, M. S. (1983b). Assessment of nitrogen status of soils for cereal crops: use of plant and soil analysis to diagnose nitrogen status of spring barley. Journal of the Science of Food and Agriculture 34, 549–558.CrossRefGoogle Scholar
Schmitt, M. R. & Edwards, G. E. (1981). Photosynthetic capacity and nitrogen use efficiency of maize, wheat and rice: a comparison between C3 and C4 photosynthesis. Journal of Experimental Botany 32, 459–466.CrossRefGoogle Scholar
Wyn Jones, R. G., Brady, C. J. & Speirs, J. (1979). Ionic and osmotic relations in plant cells. In Recent Advances in the Biochemistry of Cereals (ed. Laidman, D. L. and Jones, R. G. Wyn), pp. 63–103. London: Academic Press.Google Scholar