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Van Dijk Van Dijk, Winkelhorst Winkelhorst (1978)
Testing perennial ryegrass (Lolium perenne L.) as spaced plants in swardsEuphytica, 27
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Selection criteria in grass breeding, V. Performance of Lolium perenne genotypes grown at different nitrogen levels and spacingsJ. Agric. Sci. Camb., 65
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Camlin Camlin, Stewart Stewart (1978)
The assessments of persistence and its application to the evaluation of mid‐season and late perennial ryegrass cultivarsJ. Brit. Grassld. Soc., 33
A. Lazenby, H. Rogers (1965)
Selection criteria in grass breeding. V. Performance of Lolium perenne genotypes grown at different nitrogen levels and spacingsThe Journal of Agricultural Science, 65
Lazenby Lazenby (1965)
Selection criteria in grass breedingIV. Effect of nitrogen and spacing on yield and its components. J. Agric. Sci. Camb., 65
Lazenby Lazenby, Rogers Rogers (1962)
Selection criteria in grass breedingJ. Agric. Sci. Camb., 59
A. Lazenby, H. Rogers (1964)
Selection Criteria in Grass Breeding. II. Effect, on Lolium perenne, of differences in population density, variety and available moistureThe Journal of Agricultural Science, 62
Lazenby Lazenby (1964)
Selection criteria in grass breeding. II. Effect on Lolium perenne of differences in population density, variety and available moistureJ. Agric. Sci. Camb., 62
Screening for persistence in Lolium perenne L. The assessment of persistence, as well as yield potential, is fundamentally important for cultivar evaluation of perennial grasses. But it is difficult to estimate the persistence because of limited time available for testing new varieties. The aim of this study was to find out conditions for effective and quick selection for persistence in Lolium perenne. Four strains of Lolium perenne were investigated for three years in the following split pot design with 3 replications: 180–220 kg N/ha or 360–440 kg N/ha and year, 3 or 6 cuts/year and 3–4 cm or 7–8 cm cutting height. Yield, regrowth (score 0–9, 7 days after each cut) and persistence (number of non‐surviving ramets) were determined for each ramet of all clones and for each plot of the strains. The dry matter yield was reduced to about 50 % between the first and the third year of the investigation. The differences in the dry matter yield between the four strains have been more evident in the six than in the three cutting treatment. Already at the end of the first year of the investigation the strains differed significantly in the regeneration in the six cut treatment. The regrowth of strain III showed a significant reduction compared with the other three strains. A significant reduction of the surviving ramets was first observed at the end of the second year of the investigation in the six cut treatment only, but between the strains were no significant differences. These results demonstrate, that an investigation on single plants over a period of three years cannot give an exactly prediction about the persistence of Lolium perenne strains.
Journal of Agronomy and Crop Science – Wiley
Published: May 1, 1991
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