The impact of precipitation on yield of Dactylis glomerata, Dactylis polygama, Festuca arundinacea and genus hybrids in 1986-2011

摘要

At the Jevicko site in the Czech Republic we evaluated production ability and yield variability of five varieties of Dactylis glomerata L. (DG), one variety of Dactylis polygama (DP), two varieties of Festuca arundinacea L. (FA) and two intergenus hybrids. The trials were established by grassland renovation in 1986 at Jevicko (343 m a.s.l., mean annual temperature 7.4°C, average annual precipitation 545 mm). Grass species were sown as simple legume-grass mixtures with red clover and white clover andfertilised with 240 kg ha~(-1) N+P_(35)K_(100), and utilised in three cuts. This contribution evaluates dry matter production, botanical composition of stand and yield variability. Dactylis glomerata, Festuca arundinacea and intergenus hybrids are persistent and reached high dry matter production. The yield in individual years was significantly influenced more by total rainfall in vegetation season than the total annual precipitation.