Competition Between Meadow Fescue (Festuca pratensis Huds.) and Timothy (Phleum pratense L.) at Three Levels of Nitrogen Fertilization, During Three Growing Seasons
| Autor: | M. Jösrgensen, O. Junttila |
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| Rok vydání: | 1994 |
| Předmět: | |
| Zdroj: | Journal of Agronomy and Crop Science. 173:326-337 |
| ISSN: | 1439-037X 0931-2250 |
| DOI: | 10.1111/j.1439-037x.1994.tb00580.x |
| Popis: | Competition between timothy (Phleum practense L.) and meadow fescue (Festuca pratensis Huds,) under three levels of nitrogen was studied during three growing seasons under northern climatic conditions, 69° N latitude. Timothy initially had higher competitive abilities, particularly when nitrogen was added, but due to a higher regrowth capacity, meadow fescue was able to compete with timothy increasingly over time. The species differed in their growth patterns. Timothy had a higher proportion of reproductive tillers and a larger leaf area in the upper parts of the canopy at the first harvest, especially at high nitrogen-fertilization. Consequently, timothy shaded meadow fescue during the reproductive stage of growth. After defoliation, regrowth of timothy halted for one to two weeks. Meadow fescue, by contrast, had higher tiller numbers than timothy, a higher number of intact growing points, and resumed shoot-growth rapidly after defoliation. Due to these traits, the competitive abilities of meadow fescue increased each year relative to timothy |
| Databáze: | OpenAIRE |
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