Reaction of certain plum cultivars to extreme drought

Boryana Stefanova, Kalin Dragoyski, Hristina Dinkova, Georgi Popski

Abstract: was observed in four years with extreme droughts of different types – winter-spring, early summer and long during vegetation.
The observed varieties are grown in typical mountain areas on the southeastern slopes, dry soils and without irrigation.
There have been established:
● different reaction of cultivar-rootstock combination, depending on the time and duration of drought and the habitat;
● unequal sensitivity of different varieties to drought in different years;
● the decrease of the yield does not correlate with the reduced mass of fruits;
● changes in the chemical composition of the fruit.
Early varieties Tuleu timpuriu, Cacanska lepotica and Tegera are less sensitive to summer drought coinciding with the period of fruit-growing, so their inclusion in the assortment schemes will ensure some security for farmers.
Late plum variety Helen is relatively less affected by droughts, although if they are too long (2012) – fruits remain small, but this does not significantly influence on the yield.

Keywords: cultivars; drought tolerance; plum

Date published: 2017-07-07