Articles
EVALUATION OF FROST HARDINESS IN SOME CULTIVARS OF DIOSPYROS SPP. BY ARTIFICIAL FREEZING
Article number
685_12
Pages
113 – 118
Language
English
Abstract
Persimmon is a subtropical fruit tree but is tolerant to temperatures several degrees below zero.
The Czech Republic does not belong to a persimmon growing area due to low winter temperatures which go below -15°C. However, there are interspecific hybrids between Diospyros kaki L. and Diospyros virginiana L., which have higher frost tolerance.
Their origin is in the Ukraine, GNBS Yalta and their names are cv.
Rossiyanka and cv.
Nikitskaiya Bordovaiya.
The aim of our work was to compare the frost tolerance among the cultivars of Diospyros kaki L. (cvs.
Zenjimaru, Vaniglia, Tipo and Fuyu), interspecific hybrids (cvs.
Rossiyanka and Nikitskaiya Bordovaiya) and Diospyros lotus L. One-year-old shoots were used in artificial freezing tests.
The experiments were performed during the years 1999-2004. The temperatures for determination of LT50 were from -4°C to -24°C. The cultivars of Diospyros kaki L. had an LT50 from -13°C to -16°C. The interspecific hybrids had values of LT50 from -19°C to -22°C. The LT50 of Diospyros lotus L. was -21°C. Both interspecific cultivars seem to be promising for growing under outside conditions in the warmest areas of the Czech Republic.
The Czech Republic does not belong to a persimmon growing area due to low winter temperatures which go below -15°C. However, there are interspecific hybrids between Diospyros kaki L. and Diospyros virginiana L., which have higher frost tolerance.
Their origin is in the Ukraine, GNBS Yalta and their names are cv.
Rossiyanka and cv.
Nikitskaiya Bordovaiya.
The aim of our work was to compare the frost tolerance among the cultivars of Diospyros kaki L. (cvs.
Zenjimaru, Vaniglia, Tipo and Fuyu), interspecific hybrids (cvs.
Rossiyanka and Nikitskaiya Bordovaiya) and Diospyros lotus L. One-year-old shoots were used in artificial freezing tests.
The experiments were performed during the years 1999-2004. The temperatures for determination of LT50 were from -4°C to -24°C. The cultivars of Diospyros kaki L. had an LT50 from -13°C to -16°C. The interspecific hybrids had values of LT50 from -19°C to -22°C. The LT50 of Diospyros lotus L. was -21°C. Both interspecific cultivars seem to be promising for growing under outside conditions in the warmest areas of the Czech Republic.
Publication
Authors
I. Ondrasek, B. Krska, A. Bilavcik
Keywords
freezing tests, interspecific hybrid, LT50, persimmon, temperatures
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