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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

Published online by Cambridge University Press:  27 March 2009

D. Wilman ,
D. Droushiotis ,
Mary N. Mzamane  and
J. S. Shim
D. Wilman
Affiliation:
Department of Agriculture, University College of Wales, Aberystwyth
D. Droushiotis
Affiliation:
Department of Agriculture, University College of Wales, Aberystwyth
Mary N. Mzamane
Affiliation:
Department of Agriculture, University College of Wales, Aberystwyth
J. S. Shim
Affiliation:
Department of Agriculture, University College of Wales, Aberystwyth
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Summary

The effects of six intervals between harvests and three levels of N application on the initiation, emergence and longevity of leaves and longevity of tillers of Italian ryegrass and on dimensions and weights of leaves of four ryegrass varieties were studied in the first harvest year in field experiments. Dimensions and weights of leaves and ‘stems’ of the four varieties were recorded on three dates in the second harvest year.

The number of leaf primordia on the shoot apex of young Italian ryegrass tillers was increased by N application and seemed to be increased by increasing the period of uninterrupted growth allowed to the parent tillers. The number of leaves which emerged on marked tillers during a 30-week period was approximately halved by increasing the interval between harvests from 3 to 10 weeks, but was not affected by N application. The number of leaves which died on marked tillers was at least doubled by increasing the interval between harvests from 3 to 5 weeks. The second and third leaves to emerge on a tiller had a longer potential life than the first leaf. Increasing the interval between harvests greatly increased the average age of the green leaves in the canopy at the time of harvest.

Length and width, but not thickness, of fully expanded green leaf blades were increased by both N application and increased interval between harvests. The effect of applied N in increasing leaf size appeared to be an important reason for the positive effect of N on yield, particularly with the longer intervals. The effect of N in increasing the number of tillers and leaves was important with the shorter intervals. Applied N reduced dry weight per unit volume of plant tissue and increased ‘stem’ length and increased weight and volume of herbage per unit volume of canopy. The area of exposed surface of ‘stem’ seemed too large to be ignored when considering the photosynthetic capacity of the canopy, particularly with the longer intervals.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 89 , Issue 1 , August 1977 , pp. 65 - 79
Copyright
Copyright © Cambridge University Press 1977

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References

Anslow, R. C. (1966). The rate of appearance of leaves on tillers of the Gramineae. Herbage Abstracts 36, 149–55.Google Scholar
Droushiotis, D. (1974). Aspects of the agronomy and botanical characteristics of Lolium multiflorum with reference to nitrogen supply and frequency of cutting. M.Sc. thesis, University College of Wales, Aberystwyth.Google Scholar
Huxley, P. A. (1971). Leaf volume: a simple method for measurement and some notes on its use in studies of leaf growth. Journal of Applied Ecology 8, 147–53.CrossRefGoogle Scholar
Jewiss, O. R. & Woledge, Jane (1967). The effect of age on the rate of apparent photosynthesis in leaves of tall fescue (Fesluca arundinacea Schreb.). Annals of Botany New Series 31, 661–71.CrossRefGoogle Scholar
Kemp, C. D. (1960). Methods of estimating the leaf area of grasses from linear measurements. Annals of Botany New Series 24, 491–9.CrossRefGoogle Scholar
Langer, R. H. M. (1972). How Grasses Grow. The Institute of Biology's Studies in Biology, no. 34. London: Edward Arnold (Publishers) Ltd.Google Scholar
Morton, A. G. & Watson, D. J. (1948). A physiological study of leaf growth. Annals of Botany New Series 12, 281–310.CrossRefGoogle Scholar
Mzamane, Mary N. (1974). Aspects of the morphology of grasses in relation to their agricultural value. M.Sc. thesis, University College of Wales, Aberystwyth.Google Scholar
Ojuederie, B. M. (1974). Effects of nitrogenous fertilizer on grass growth. Ph.D. thesis, University College of Wales, Aberystwyth.Google Scholar
Rhodes, I. (1969). The relationship between productivity and some components of canopy structure in ryegrass (Loliumspp.). I. Leaf length. Journal of Agricultural Science, Cambridge 73, 315–19.CrossRefGoogle Scholar
Shim, J. S. (1975). Leaf dimensions and productivity of varieties of Lolium perenne and Lolium multiflorum in response to nitrogen supply and frequency of cutting. M.Sc. thesis, University College of Wales, Aberystwyth.Google Scholar
Terry, R. A. & Tilley, J. M. A. (1964). The digestibility of the leaves and stems of perennial ryegrass, cocksfoot, timothy, tall fescue, lucerne and sainfoin, as measured by an in vitro procedure. Journal of the British Grassland Society 19, 363–72.CrossRefGoogle Scholar
Thorne, Gillian N. (1959). Photosynthesis of lamina and sheath of barley leaves. Annals of Botany New Series 23, 365–70.CrossRefGoogle Scholar
Whitehead, D. C. (1970). The role of nitrogen in grassland productivity. Bulletin 48 Commonwealth Bureau of Pastures and Field Crops. Farnham Royal: Commonwealth Agricultural Bureaux.Google 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, 141–7.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 proportion and yield of crop fractions in four ryegrass varieties in the first harvest year. Journal of Agricultural Science, Cambridge 86, 189–203.CrossRefGoogle Scholar
Wilman, D., Koocheki, A. & Lwoga, A. B. (1976b). The effect of interval between harvests and nitrogen application on the proportion and yield of crop fractions and on the digestibility and digestible yield and nitrogen content and yield of two perennial ryegrass varieties in the second harvest year. Journal of Agricultural Science, Cambridge 87, 59–74.CrossRefGoogle Scholar
Wilman, D., Koocheki, A., Lwoga, A. B., Droushiotis, D. & Shim, J. S. (1976 c). 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., Ojuederie, B. M. & Asare, E. O. (1976 d). Nitrogen and Italian ryegrass. 3. Growth up to 14 weeks: yields, proportions, digestibilities and nitrogen contents of crop fractions, and tiller populations. Journal of the British Grassland Society 31, 73–9.CrossRefGoogle Scholar
Wilson, J. R. & Ng, T. T. (1975). Influence of water stress on parameters associated with herbage quality of Panicum maximum var. trichoglume. Australian Journal of Agricultural Research 26, 127–36.CrossRefGoogle Scholar
Woledge, Jane (1973). The photosynthesis of ryegrass leaves grown in a simulated sward. Annals of Applied Biology 73, 229–37.CrossRefGoogle Scholar
Woledge, Jane & Leafe, E. L. (1976). Single leaf and canopy photosynthesis in a ryegrass sward. Annals of Botany 40, 773–83.CrossRefGoogle Scholar