Reaction of Certain Plum Cultivars to Extreme Drought | РЕАКЦИЯ НА НЯКОИ СЛИВОВИ СОРТОВЕ КЪМ ЕКСТРЕМНИ ЗАСУШАВАНИЯ
2014
Stefanova, B., Institute of Mountain Stockbreeding and Agriculture, Troyan (Bulgaria) | Dragojski, K., Institute of Mountain Stockbreeding and Agriculture, Troyan (Bulgaria) | Dinkova, H., Institute of Mountain Stockbreeding and Agriculture, Troyan (Bulgaria) | Popski, G., Institute of Mountain Stockbreeding and Agriculture, Troyan (Bulgaria)
The reaction of different cultivars-rootstock combinations of plums grown in experimental plantations in RIMSA in Troyan was observed in four years with extreme droughts of different types ЁC 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: Ўс different reaction of cultivar-rootstock combination, depending on the time and duration of drought and the habitat; Ўс unequal sensitivity of different varieties to drought in different years; Ўс the decrease of the yield does not correlate with the reduced mass of fruits; Ўс 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) ЁC fruits remain small, but this does not significantly influence on the yield.
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