Folia Horticulturae

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Meteorological conditions of the blooming of nanking cherry (Prunus tomentosa Thunb.) and their impact on the yield

Jan Grabowski*, Zdzisław Kawecki**, Zofia Tomaszewska*

**Department of Meteorology
**Department of Horticulture
**University of Warmia and Mazury
**Plac Łódzki 1, 10-757 Olsztyn, Poland
**e-mail: jan.grab@uwm.edu.pl

The study was carried out in the years 1997-2005 to investigate phenophases of nanking cherry shrubs and its yielding under climatic conditions of the Warmia region (Olsztyn). The plants were obtained in Olsztyn from the seeds of nanking cherry shrubs originating from the eastern part of Belarus (Gorki). One-year old seedlings were planted at 3×2 m apart in grey-brown podsolic soil. Investigations were carried out on 40 shrubs from the second year after planting. The data on the beginning of vegetative season, the blooming period and the harvest time were recorded every year. The yield per bush was also recorded. More important climatic factors of the blooming season were analyzed as well, i.e.: mean daily air temperature, the sum of minimal temperatures from the beginning of the vegetative season till the end of the blooming, ground frosts, precipitation and its effect on yielding over a period of 9 years.

Phenophases were found to be diversified depending on experimental year. The greatest diversity was observed for terms at the start of the vegetative season. The difference between the extreme terms reached up to 6 weeks. On average, the blooming period occurred in April. The statistical analysis indicated that the yield of nanking cherry was significantly affected by mean temperatures of the blooming period, minimal temperatures, ground frosts, and precipitation.

Grabowski J., Kawecki Z., Tomaszewska Z., 2007. Meteorological conditions of the blooming of nanking cherry (Prunus tomentosa Thunb.) and their impact on the yield. Folia Horticulturae 19/1: 45-52.