Hostname: page-component-848d4c4894-8bljj Total loading time: 0 Render date: 2024-07-06T22:21:00.320Z Has data issue: false hasContentIssue false
  • English
  • Français

The effect of cutting frequency and root segregation on the yield from perennial ryegrass-white clover associations

Published online by Cambridge University Press:  27 March 2009

B. F. Bland
B. F. Bland
Affiliation:
West of Scotland Agricultural College, Auchincruive, Ayr
Get access Rights & Permissions [Opens in a new window]

Extract

1. Dry-matter and nitrogen yields were recorded from perennial ryegrass-white clover associations which were defoliated 2, 4 or 6 times a year during the period 1963 to 1965.

2. The average yearly output of dry matter was approximately 4000, 7000 and 6000 lb/acre for 1963, 1964 and 1965 respectively. Nitrogen harvested amounted to 132, 184 and 179 lb N/acre.

3. The mean annual dry-matter yields from 2, 4 and 6 defoliations were 5300, 6100 and 6000 lb/acre and the corresponding figures for nitrogen yields were 112, 166 and 217 lb N/acre.

4. Both segregation of the species below ground and increasing the defoliation frequency were responsible for higher contributions towards drymatter and nitrogen yield from the clover component.

5. A comparison of the nitrogen yields between the plots with species segregated rather than integrated below ground suggests that the effects of underground nitrogen transference from 30–31 lb N/acre could first be demonstrated in the spring of the third year.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 69 , Issue 3 , December 1967 , pp. 391 - 397
Copyright
Copyright © Cambridge University Press 1967

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bakhuis, J. A. & Kleter, H. J. (1965). Some effects of associated growth on grass and clover under field conditions. Neth. J. agric. Sci. 13, no. 3, 280–310Google Scholar
Bland, B. F. (1967). Notes on polythene used below ground to separate herbage species. J. Br. Orassld Soc. 22, no. 4.Google Scholar
Butler, G. W. & Bathurst, N. O. (1956). The underground transference of nitrogen from clover to associated grass. Proc. 7th int. Orassld Gongr. p. 168.Google Scholar
Davies, W. (1952). The Grass Crop, p. 75. London: E. and F. N. Spon Ltd.Google Scholar
Davis, A. G. & Cooper, M. M. (1951). White clover trial. I. Production in terms of liveweight increase. II. Changes in botanical composition. J. Br. Orassld Soc. 6, 229–43.CrossRefGoogle Scholar
Johstone-Wallace, D. B. (1937). The influence of grazing management and plant associations on the chemical composition of pasture plants. J. Am. Soc. Agron. 29, 441–55.CrossRefGoogle Scholar
Lisle, E. (1713). Observations in Husbandry. London: G. Faulkner.Google Scholar
National Institute of Agbicultubal Botany. Farmers’ Leaflets no. 16 and 23, 1966.Google Scholar
Stern, W. R. & Donald, C. M. (1962). The influence of leaf area and radiation on the growth of clover in swards. Aust. J. agric. Res. 13, 615–23.CrossRefGoogle Scholar