Open AccessBEHAVIOR OF SOME GRAPEVINE CULTIVARS FROM MURFATLAR VINEYARD IN THE SPECIAL CLIMATIC CONDITIONS OF THE WINE YEAR 2019-2020
Author(s) -
Ionica Dina,
Aurora Ranca,
Anamaria Tănase,
Sergiu-Ayar Ene
Publication year - 2020
Publication title -
romanian journal of horticulture
Language(s) - English
Resource type - Journals
eISSN - 2734-7664
pISSN - 2734-7656
DOI - 10.51258/rjh.2020.18
Subject(s) - vineyard , cultivar , veraison , horticulture , berry , sugar , ripening , wine grape , wine , shoot , annual growth cycle of grapevines , viticulture , vitis vinifera , biology , food science , biochemistry
The climate changes in Murfatlar vineyard in recent years consist inthe increaseofmonthly average temperatures, recorded in both cold and warm seasons,accompanied by an irregular distribution of rainfall during the year, whichsignificantly influences the growth of grapevine, the quality and production ofgrapes.Six representative cultivars were studied, three for white wines: Chardonnay,Columna and Muscat Ottonel and three for red wines: Fetească Neagră, Mamaia andCabernet Sauvignon. In the last two years (2019-2020) warm winters and very drysummers have led to the onset of budburst, almost simultaneously for all the studiedcultivars, followed by a very weak growth and development of shoots (2020) and anacceleration development of phenophases, mainly berween veraison and ripening.Water stress during the vegetative period, a hygroscopicity below 60% between Julyand August and low vegetative apparatus influenced the growth ofthe berries,resulting small grapes, and a very low must yield in 2020.Concerning the quality ofgrape production, the studied cultivars achieved more sugar concentrations inberries up to 35.8 g/L (in 2019) and 36.0 g/L (in 2020), higher than the valuesobtained in normal years. In the conditions of a pronounced dry climate manifested inthe two years of study, the productions were below the normal level, especialy in2020, achieving much diminished productions for all cultivars, except the Mamaiacultivar. The Mamaia cultivar had a positive reaction, registering an increase ofproduction, that exceeded the multiannual value by 20% in 2020 andby 10% in 2019,the concentration of sugars in the must being above the average value obtained innormal years, exceeding by 3% and 9%, respectively, the multiannual average.Statistical calculations were done using SPSS Statistics 17.0, using mainly the Duncantest for a degree of significance of 5%.