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Early spring and late autumn response to applied nitrogen in four grasses

1. Yield, number of tillers and chemical composition

Published online by Cambridge University Press:  27 March 2009

D. Wilman
D. Wilman
Affiliation:
Department of Agriculture, University College of Wales, Aberystwyth
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Summary

The regrowth of Aberystwyth S. 23 perennial ryegrass, S. 24 perennial ryegrass, S. 59 red fescue and S. 170 tall fescue was studied in field swards, comparing four levels of applied nitrogen, for 8 weeks following a clearing cut. The clearing cuts were in mid-October, mid-February and mid-March in each of 3 years, different plots being used on each occasion.

Grass yield was more closely related to solar radiation receipt than to temperature. When radiation during the 3 or 4 weeks before a period of study was added to radiation during the 8-week period, to incorporate some allowance for temperature, the amount of additional yield per unit of additional radiation comparing the first spring period with the autumn period was about the same as that comparing the second with the first spring period. Where no N was applied, there was little or no increase in yield above ground level or above 4 cm from week 1 to about week 6 in the autumn and first spring period, whereas where N was applied yield increased steadily, though rather slowly, during those 5-week periods. Response to N, measured as kg dry matter above 4 cm/kg N applied, was about twice as great in the second as in the first spring period; on the other hand response to N measured as number of days saved in reaching a given yield was greater in the first than the second spring period. The positive effect of applied N on relative growth rate occurred mainly in the rather early stages of regrowth, which seems to be typical of any time of year.

Applied N increased the N and nitrate-N content of herbage and reduced the watersoluble carbohydrate content. Applied N increased the number of tillers and the proportion of yield above 4 cm. Yield below 4 cm was not much affected by N or by stage of regrowth. The ‘earliness’ in spring of S. 24, S. 59 and S. 170 compared with S. 23 was associated with greater height and a higher proportion of yield above 4 cm and not with higher above-ground yield. The ryegrasses responded more to N than the fescues in respect of yield above 4 cm and number of tillers. In 2 years in which the number of tillers was relatively low at the beginning of the spring periods of study, the number increased during those periods and there was a large positive effect of applied N, whereas, in a year in which the number was high initially, there was no increase during the periods of study and little response to N.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 94 , Issue 2 , April 1980 , pp. 425 - 442
Copyright
Copyright © Cambridge University Press 1980

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References

Blackman, G. E. (1936). The influence of temperature and available nitrogen supply on the growth of pasture in the spring. Journal of Agricultural Science, Cambridge 26, 620–647.Google Scholar
Cochran, W. G. & Cox, G. M. (1957). Experimental Designs, 2nd ed., pp. 293–302. New York: John Wiley.Google Scholar
Cooper, J. P. (1969). Potential forage production. In Grass and Forage Breeding (ed. Phillips, Ll. and Hughes, R.), pp. 5–13. Occasional Symposium no. 5, British Grassland Society.Google Scholar
Davies, A. & Calder, D. M. (1969). Patterns of spring growth in swards of different grass varieties. Journal of the British Grassland Society 24, 215–225.Google Scholar
Faithfull, N. T. (1971). Automated simultaneous determination of nitrogen, phosphorus, potassium and calcium on the same herbage digest solution. Laboratory Practice 20, 41–44.Google Scholar
Follett, M. J. & Ratcliff, P. W. (1963). Determination of nitrite and nitrate in meat products. Journal of the Science of Food and Agriculture 14, 138–144.CrossRefGoogle Scholar
Garwood, E. A. (1969). Seasonal tiller populations of grass and grass/clover swards with and without irrigation. Journal of the British Grassland Society 24, 333–344.Google Scholar
Langer, R. H. M. (1959). Growth and nutrition of timothy (Phleum pratense L.). IV. The effect of nitrogen, phosphorus and potassium supply on growth during the first year. Annals of Applied Biology 47, 211–221.Google Scholar
Langer, R. H. M. (1972). How Grasses Grow. The Institute of Biology's ‘Studies in Biology’, no. 34. London: Edward Arnold.Google Scholar
National Institute of Agricultural Botany (1978–1979). Recommended varieties of grasses. Farmers Leaflet no. 16. Cambridge.Google Scholar
Nátr, L. (1975). Influence of mineral nutrition on photosynthesis and the use of assimilates. In Photosynthesis and Productivity in Different Environments (ed. Cooper, J. P.), pp. 537–555. Cambridge University Press.Google Scholar
Ojuederie, B. M. (1974). Effects of nitrogenous fertilizer on grass growth. Ph.D. thesis, University College of Wales, Aberystwyth.Google Scholar
Radford, P. J. (1967). Growth analysis formulae – their use and abuse. Crop Science 7, 171–175.CrossRefGoogle Scholar
Robson, M. J. & Jewiss, O. R. (1968). A comparison of British and North African varieties of tall fescue (Festuca arundinacea). II. Growth during winter and survival at low temperatures. Journal of Applied Ecology 5, 179–190.CrossRefGoogle Scholar
Robson, M. J. & Parsons, A. J. (1978). Nitrogen deficiency in small closed communities of S 24 ryegrass. I. Photosynthesis, respiration, dry matter production and partition. Annals of Botany 42, 1185–1197.CrossRefGoogle Scholar
Rudeforth, C. C. (1970). Soils of North Cardiganshire. Harpenden: Soil Survey of England and Wales.Google Scholar
Ryle, G. J. A. (1970). Effects of two levels of applied nitrogen on the growth of S 37 cocksfoot in small simulated swards in a controlled environment. Journal of the British Grassland Society 25, 20–29.Google Scholar
Ryle, G. J. A. (1974). The growth of the grass plant. Silver Jubilee Report, 1949–1974, of the Grassland Research Institute, Hurley, pp. 62–71.Google Scholar
Thomas, T. A. (1977). An automated procedure for the determination of soluble carbohydrates in herbage. Journal of the Science of Food and Agriculture 28, 639–642.Google Scholar
Wilman, D. (1965). The effect of nitrogenous fertilizer on the rate of growth of Italian ryegrass. Journal of the British Grassland Society 20, 248–254.Google Scholar
Wilman, D. (1970). The effect of nitrogenous fertilizer on the rate of growth of Italian ryegrass. 2. Growth up to 10 weeks: dry-matter yield and digestibility. Journal of the British Grassland Society 25, 154–161.CrossRefGoogle Scholar
Wilman, D. (1975). Nitrogen and Italian ryegrass. 1. Growth up to 14 weeks: dry-matter yield and digestibility. Journal of the British Grassland Society 30, 141–147.Google Scholar
Wilman, D., Droushiotis, D., Mzamane, M. N. & Shim, J. S. (1977). The effect of interval between harvests and nitrogen application on initiation, emergence and longevity of leaves, longevity of tillers and dimensions and weights of leaves and ‘stems’ in Lolium. Journal of Agricultural Science, Cambridge 89, 65–79.CrossRefGoogle Scholar
Wilman, D. & Griffiths, P. D. (1978). The effect of winter and early spring grazing by sheep on subsequent sward production. Journal of Agricultural Science, Cambridge 90, 471–477.CrossRefGoogle Scholar
Wilman, D., Koocheki, A., Lwoga, A. B., Droushiotis, D. & Shim, J. S. (1976). The effect of interval between harvests and nitrogen application on the numbers and weights of tillers and leaves in four ryegrass varieties. Journal of Agricultural Science, Cambridge 87, 45–57.Google Scholar