Articles
EFFECTS OF METEOROLOGICAL VARIABLES ON FREE AND SELF-FERTILITY OF SOUR CHERRY
Article number
1020_40
Pages
277 – 285
Language
English
Abstract
We conducted an analysis of fruit set of sour cherry flowers over a 22-year period and correlated fruit set data to meteorological variables.
Our analysis showed that the degree of free fertilization (combination of cross- and self-pollination) was mostly influenced by maximum temperature and sunshine duration.
The rate of free fertilization increased with higher daily maximum temperatures and longer sunshine duration.
The effectiveness of self-pollination significantly depended on the meteorological conditions.
Degree of self-fertilization was influenced directly by temperature and indirectly by other climatic parameters.
There was a significant connection between maximum and minimum temperatures during bloom and the rate of self-fertilization.
Increases of maximum temperature reduced the effectiveness of self-pollination.
A 1°C increase of maximum temperature reduced self-fertilization rate by 0.6%. When considering minimum temperature, the most favorable temperature was 7.5-8.5°C. If minimum temperatures were under 4°C or above 12°C, self-fertilization rate was reduced to a quarter of the value at 8°C. We believe that the effectiveness of self-fertilization can be improved considerably by placement of isolator bags within the canopy of the tree, avoiding placement on the external, western canopy surface.
Our analysis showed that the degree of free fertilization (combination of cross- and self-pollination) was mostly influenced by maximum temperature and sunshine duration.
The rate of free fertilization increased with higher daily maximum temperatures and longer sunshine duration.
The effectiveness of self-pollination significantly depended on the meteorological conditions.
Degree of self-fertilization was influenced directly by temperature and indirectly by other climatic parameters.
There was a significant connection between maximum and minimum temperatures during bloom and the rate of self-fertilization.
Increases of maximum temperature reduced the effectiveness of self-pollination.
A 1°C increase of maximum temperature reduced self-fertilization rate by 0.6%. When considering minimum temperature, the most favorable temperature was 7.5-8.5°C. If minimum temperatures were under 4°C or above 12°C, self-fertilization rate was reduced to a quarter of the value at 8°C. We believe that the effectiveness of self-fertilization can be improved considerably by placement of isolator bags within the canopy of the tree, avoiding placement on the external, western canopy surface.
Publication
Authors
L. Lakatos, M.C. Dussi, T. Szabó, Z. Szabó, M. Soltész , J. Nyéki
Keywords
Prunus cerasus, fertilization, minimum-maximum temperature, night and day temperature
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