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Ermittlung geeigneter Selektionskriterien zur Verbesserung der Persistenz beim Deutschen Weidelgras
Author(s) -
Bugge Gisela
Publication year - 1991
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1991.tb00919.x
Subject(s) - lolium perenne , perennial plant , persistence (discontinuity) , dry matter , biology , cultivar , lolium , agronomy , horticulture , poaceae , geotechnical engineering , engineering
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.