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Irrigation and Nitrogen Studies in s. 23 Ryegrass Grown for Seed: 1. Growth, Development, Seed Yield Components and Seed Yield

Published online by Cambridge University Press:  27 March 2009

P. D. Hebblethwaite
P. D. Hebblethwaite
Affiliation:
University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics.
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Summary

The effects of irrigation and nitrogen on S. 23 perennial ryegrass grown for seed were investigated in a series of field experiments from 1972 to 1974. Irrigation significantly increased seed yield by 16% in 1972 and 52% in 1974 but had no effect in the wet year of 1973. In 1972 maximum deficit reached 110 mm at the end of July and coincided with anthesis. Consequently the yield response was due to an increase in number of seeds per unit area and no other seed yield component was affected. In 1974 peak deficit also reached about 100 mm but started to build up rapidly very early in the season and had reached 80 mm by the time that the first ears emerged. Consequently the yield response was due to increases in number of fertile tillers, number of seeds per unit area and 1000-seed weight.

Irrigation had no significant effect on number of florets or seeds, except in 1974 when percentage of florets which produced seed was increased by 2%.

Irrigation had some effect on threshed straw yields, total dry matter, harvest index and total number of tillers but where this occurred the response was much smaller than that of seed yield which indicates that irrigation had greater effects on the reproductive development of the crop than on yield of dry matter and tillering patterns. Increasing the quantity of nitrogen from 0 to 80 kg/ha increased seed yields, all seed yield components except 1000-seed weight, threshed straw yields and total dry matter and number of tillers at most sampling dates. Increasing the quantity of nitrogen from 80 to 160 kg/ha had little further effect on the above components except in 1972 where seed yields were significantly decreased.

In 1972 number of florets was increased and percentage of florets which produced seed decreased with increasing quantities of nitrogen.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 88 , Issue 3 , June 1977 , pp. 605 - 614
Copyright
Copyright © Cambridge University Press 1977

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References

Aspinall, D., Nicholls, P. B. & May, L. H. (1964). The effects of soil moisture stress on the growth of barley. I. Vegetative development and grain yield. Australian Journal of Agricultural Research 15, 729–45.CrossRefGoogle Scholar
J., Bingham. (1966). Varietal response in wheat to water supply in the field, and male sterility caused by a period of drought in a glasshouse experiment. Annals of Applied Biology 57, 365–77.Google Scholar
Canode, C.I. & Van Reuben, R. W. (1963). Seed production characteristics of selected grass species and varieties. Bulletin 647, Washington Agricultural Experimental Station, Institute of Agricultural Sciences, Washington State University, pp. 1–15.Google Scholar
Castle, M. E. & Reid, D. (1960). Irrigation of grassland in South-West Scotland and its influence on fertilizer use. Proceedings of the 8th International Grassland Congress, pp. 146–50.Google Scholar
Evans, G. (1959). Seed rates of grasses for seed production. I. Pasture varieties of ryegrass, cocksfoot and timothy. Empire Journal of Experimental Agriculture 27, 291–9.Google Scholar
Evans, T. A. (1954). The effects of nitrogen applications at different dates on the seed yield of pedigree grasses. Journal of the British Grassland Society 9, 53–60.CrossRefGoogle Scholar
Evens, A. & Sonneveld, A. (1954). Grass seed production trials: 2. Gestencilde Mededelingen. Centraal Instituut voor Landbouwkundig Onderzoek 9, pp. 51.Google Scholar
Hebblethwaite, P. D. & McGowan, M. (1977). Irrigation and nitrogen studies in S. 23 ryegrass grown for seed. 2. Crop transpiration and soil-water status. Journal of Agricultural Science, Cambridge 88, 615–24.CrossRefGoogle Scholar
Lambert, D. A. (1967). The effects of nitrogen and irrigation on timothy (Phleum pratense) grown for the production of seed. II. Reproductive growth and yield of seed. Journal of Agricultural Science, Cambridge 69, 231–9.CrossRefGoogle Scholar
Lattino, J. (1972). Differentiation in the grass inflorescence. In The Biology and Utilization of Grasses(ed Younger, V. B. and McKell, C. M.), pp. 365–99. New York and London: Academic Press.CrossRefGoogle Scholar
Lewis, J. (1959). The effects of seed rate, clover and applied nitrogen on broadcast seed crops of pasture ryegrass. Journal of the British Grassland Society 14, 285–92.CrossRefGoogle Scholar
Low, A. J. & Abmitaoe, E. R. (1959). Irrigation of grassland. Journal of Agricultural Science, Cambridge 52, 256–62.CrossRefGoogle Scholar
Maokay, D. C. & Eaves, C. A. (1962). The influence of irrigation treatments on yields and on fertilizer utilization by sweetcorn and snap beans. Canadian Journal of Plant Science 42, 219—28.CrossRefGoogle Scholar
May, L. H. & Milthorpe, F. L. (1962). Drought resistance of crop plants. Field Crop Abstracts 15, 171–9.Google Scholar
Munbo, I. A. (1958). Irrigation of grassland. The influence of irrigation and nitrogen treatments on the yield and utilization of a riverside meadow. Journal of the British Grassland Society 13, 213–21.Google Scholar
Penman, H. L. (1962). Woburn irrigation, 1951–59. II. Results for grass. Journal of Agricultural Science, Cambridge 58, 349–64.CrossRefGoogle Scholar
Rampton, H. H. (1965). Forty years of testing grass and clover varieties for seed yields in Oregon. Station Bulletin 600, Agricultural Experimental Station, Oregon State University, Corvallis, Oregon, pp. 1–69.Google Scholar
Reyntens, H. (1949). [Grass seed production.] Revue de I'Agriculture. Bruxelles 2, 885–906.Google Scholar
Roberts, H. (1958). The effect of defoliation on the seed producing capacity of bred strains of grasses. I. Timothy and perennial ryegrass. Journal of the British Grassland Society 13, 255–61.CrossRefGoogle Scholar
Roberts, H. M. (1966). The seed productivity of perennial ryegrass varieties. Journal of Agricultural Science, Cambridge 66, 225–32.CrossRefGoogle Scholar
Roebuck, J. F. & Peeler, C. H. (1966). The effect of irrigation on yield of spring barley and winter wheat Experimental Husbandry 13, 85—9.Google Scholar
Ryle, G. J. A. (1966). The physiological aspects of seed yield in grasses. In Growth of Cereals and Grasses (ed. Milthorpe, F. L. and Ivins, J. D.), pp. 106–20. Proceedings 12th Easter School in Agricultural Sciences, University of Nottingham. London: Butterworths.Google Scholar
Salter, P. J. & Goode, J. E. (1967). Crop responses to water at different stages of growth. Research Review, no. 2., Commonwealth Bureau of Horticultural and Plantation Crops, pp. 44–8.Google Scholar
Spiertz, J. H. J. & Ellen, J. (1972). The effect of light intensity on some morphological and physiological aspects of the crop perennial ryegrass (Lolium perenne L. var. ‘Cropper') and its effect on seed production. Netherlands Journal of Agricultural Science 20, 232–46.CrossRefGoogle Scholar
Stiles, W. & Williams, T. E. (1965). The response of a ryegrass/white clover sward to various irrigation regimes. Journal of Agricultural Science, Cambridge 65, 351–64.CrossRefGoogle Scholar
Wilson, J. R. (1959). The influence of time of tiller origin and nitrogen level on the floral initiation and ear emergence of four pasture grasses. New Zealand Journal of Agricultural Research 2, 915–32.CrossRefGoogle Scholar