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Selection criteria in grass breeding. V. Performance of Lolium perenne genotypes grown at different nitrogen levels and spacings

Published online by Cambridge University Press:  27 March 2009

Alec Lazenby  and
H. H. Rogers
Alec Lazenby
Affiliation:
School of Agriculture, University of Cambridge
H. H. Rogers
Affiliation:
Plant Breeding Institute, Cambridge
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Extract

1. The yields and yield components are recorded for selected clones of Lolium perenne, grown at different levels of applied nitrogen (0, 200, 400, 600 and 800 lb. of nitrogen per acre per annum) and at two spacings (widely spaced plants and simulated monoculture swards). Four harvests were taken in each of the two years 1962 and 1963.

2. In both years there were significant and consistent differences between clones in their drymatter production per unit area, detectable at both spacings. A genotype x spacing interaction was detected only in 1962. A genotype x nitrogen interaction at some harvests was not found on annual totals.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 65 , Issue 1 , August 1965 , pp. 79 - 89
Copyright
Copyright © Cambridge University Press 1965

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References

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