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Flushing variability of pedunculate oak (Quercus robur L.) in the provenance experiment in Croatia

The Provenance experiment of Pedunculate Oak, with total of 16 provenances was established in spring 1988 at Gajno locality, Forest office Karlovac. The Experiment was established in a completely randomised block design in four repetitions with 400 2+0 old seedlings per provenance. Flushing investigation of Pedunculate Oak started in spring 1992. Monitoring was repeated in 1993 and 1994. Significant differences in flushing variability range were observed between and within provenances. Variability of flushing in 1992 was three weeks, 1993 four weeks and 1994 six weeks. More detailed investigation of flushing of Pedunculate Oak started in 1996, in seven flushing phases. The Results of this investigation have shown existence of differences in flushing time between and within provenances in all seven phases.

Pedunculate Oak provenances; variability of flushing phases; Croatia

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