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The seed productivity of perennial rye-grass varieties

Published online by Cambridge University Press:  27 March 2009

H. M. Roberts
H. M. Roberts
Affiliation:
Welsh Plant Breeding Station, Aberystwyth
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Extract

1. Seed plots of five perennial rye-grass varieties, S23, S24, S321, Melle Pasture and an experimental type, Ba6280, were established in 18 in. rows.

2. Each variety was subjected to hard grazing by sheep in September, at ear initiation in spring, and 3 weeks following ear initiation; one series of plots was left ungrazed. Three levels of spring nitrogen, 2, 4 and 6 cwt./acre ‘Nitro-chalk’ (21%N), were applied to subplots.

3. S321 produced significantly more seed heads and Ba6280 gave significantly fewer heads than S23, S24 and Melle. September grazing increased head production by 15%, whilst the two spring grazings gave fewer heads than the ungrazed plots. An increase in the rate of nitrogen application in spring favoured head production.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 66 , Issue 2 , April 1966 , pp. 225 - 232
Copyright
Copyright © Cambridge University Press 1966

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References

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