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Effects of applied nitrogen on grass yield, nitrogen content, tillers and leaves in field swards

Published online by Cambridge University Press:  27 March 2009

D. Wilman  and
P. Joy Pearse
D. Wilman
Affiliation:
Department of Agriculture, University College of Wales, Aberyslwyth
P. Joy Pearse
Affiliation:
Department of Agriculture, University College of Wales, Aberyslwyth
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Summary

Effects of three levels of N application and four intervals between harvests on field swards of perennial ryegrass (Lolium perenne L.) were studied during 6-week periods in summer and spring. Ryegrass was compared with tall fescue (Festuca arundinacea Schreb.) in spring and autumn.

An increase in the interval between harvests from 1 to 6 weeks allowed a larger, positive response to applied N to develop in respect of dry-matter yield, weight per tiller, and leaf blade and sheath length. Response to N was expressed more in terms of larger leaf blades than in a larger number of tillers. Tall fescue leaf blade size was increased more than that of ryegrass by a period of uninterrupted growth in May.

Within 1 week of its application, N had increased the N content of both emerging and dying leaf blades and had increased the width and reduced the weight per unit area of the emerging blades. The positive effect of N on blade width (and on blade length where uninterrupted growth was allowed) and its negative effect on weight per unit area were ‘carried through’ the sward, to be recorded a second time when that generation of blades had become the dying blades.

Applied N increased the number of tillers, the rate of emergence of new tillers, the proportion of tiller buds which developed into tillers, and the proportion of relatively young tiller buds which developed.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 103 , Issue 1 , August 1984 , pp. 201 - 211
Copyright
Copyright © Cambridge University Press 1984

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References

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
Hesketh, J. D., Larson, E. M., Gordon, A. J. & Peters, D. B. (1983). Internal factors influencing photosynthesis and respiration. In The Growth and Functioning of Leaves (ed. Dale, J. E. and Milthorpe, F. L.), pp. 381–411. Cambridge University Press.Google Scholar
Jewiss, O. R. (1966). Morphological and physiological aspects of growth of grasses during the vegetative phase. In The Growth of Cereals and Grasses (ed. Milthorpe, F. L. and Ivins, J. D.), pp. 39–54. London: Butterworths.Google Scholar
Kemp, C. D. (1960). Methods of estimating the leaf area of grasses from linear measurements. Annals of Botany New Series 24, 491–499.CrossRefGoogle Scholar
McGinnies, W. J. (1959). A rotary lawn mower for sampling range herbage. Journal of Range Management 12, 203–204.CrossRefGoogle Scholar
Ministry of Agriculture and Fisheries (1954). The calculation of irrigation need. Technical Bulletin No. 4, p. 15. London: H.M.S.O.Google Scholar
National Institute of Agricultural Botany (1983/1984). Recommended varieties of grasses. Farmers Leaflet no. 16. Cambridge.Google Scholar
Pearse, P. J. (1983). Detailed studies of grass growth in field swards, with particular reference to response to nitrogen application and frequency of defoliation. Ph.D. thesis, University College of Wales, Aberystwyth.Google Scholar
Royal Commission on Environmental Pollution (1979). Seventh Report: Agriculture and Pollution (Chairman: Sir Hans Kornberg) Cmnd. 7644. London: H.M.S.O.Google Scholar
Rudeforth, C. C. (1970). Soils of North Cardiganshire. Harpenden: Soil Survey of England and Wales.Google Scholar
Wilman, D. (1980). Early spring and late autumn response to applied nitrogen in four grasses. 1. Yield, number of tillers and chemical composition. Journal of Agricultural Science, Cambridge 94, 425–442.CrossRefGoogle Scholar
Wilman, D., Droushiotis, D., Koocheki, A., Lwoga, A. B. & Shim, J. S. (1976 a). The effect of interval between harvests and nitrogen application on the digestibility and digestible yield and nitrogen content and yield of four ryegrass varieties in the first harvest year. Journal of Agricultural Science, Cambridge 86, 393–399.CrossRefGoogle Scholar
Wilman, D., Koocheki, A., Lwoga, A. B., Droushiotis, D. & Shim, J. S. (1976 b). 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.CrossRefGoogle Scholar
Wilman, D. & Mohamed, A. A. (1980 a). Response to nitrogen application and interval between harvests in five grasses. 1. Dry-matter yield, nitrogen content and yield, numbers and weights of tillers, and proportion of crop fractions. Fertilizer Research 1, 245–263.CrossRefGoogle Scholar
Wilman, D. & Mohamed, A. A. (1980 b). Early spring and late autumn response to applied nitrogen in four grasses. 2. Leaf development. Journal of Agricultural Science, Cambridge 94, 443–453.CrossRefGoogle Scholar
Wilman, D. & Mohamed, A. A. (1981). Response to nitrogen application and interval between harvests in five grasses. 2. Leaf development. Fertilizer Research 2, 3–20.CrossRefGoogle Scholar
Wilman, D. & Mzamane, N. (1982). The content and yield of six elements in four grasses as affected by nitrogen application and interval between harvests. Fertilizer Research 3, 97–110.CrossRefGoogle Scholar
Wilman, D. & Wright, P. T. (1978). The proportions of cell content, nitrogen, nitrate-nitrogen and watersoluble carbohydrate in three grasses in the early stages of regrowth after defoliation with and without applied nitrogen. Journal of Agricultural Science, Cambridge 91, 381–394.CrossRefGoogle Scholar
Wilman, D. & Wright, P. T. (1983). Some effects of applied nitrogen on the growth and chemical composition of temperate grasses. Herbage Abstracts 53, 387–393.Google Scholar