Naslov
Grapevine phenology in Croatia under climate change

Autori
Vučetić, Marko ; Vučetić, Višnjica ; Čiček Pomper, Petra

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings 21st International Congress of Biometeorlogy / - Durham, 2017, 75-75

Skup
21st International Congress of Biometeorology "Weather and Climate Information for Risk Management"

Mjesto i datum
Durham, Ujedinjeno Kraljevstvo, 03.09.2017. - 07.09.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
phenological stages of grapevine, linear trend, chilling units, Huglin index

Sažetak
The cultivation of grapes and wine production in Croatia has a long tradition, thus it is important to establish how climate change affects on the phenological cycle of grapevines. The aim was to determine whether the part of the country that is suitable for cultivation of grape continues to be favourable in the future. For this purpose, Huglin agroclimatological index (HI) and phenological data of seven phenological stages of seven grapevine varieties from eight phenological stations across Croatia have been analyzed in the period 1961-2016. Linear trend analysis showed that dates of leaf unfolding, beginning of first flowers and end of the flowering occurred earlier by 1-3 days/decade in the Adriatic area and 3-5 days/decade in the continental area. However, dormancy during winter is a very important factor for the beginning of the flowering. The buds of grape remain dormant, while they have accumulated sufficient chilling units (CU). In the continental part the CU is l450-550l°C and in the mid-Adriatic l30-75l°C for the temperature threshold below 7°C. The onset of full ripening and fruit picking comes significantly earlier in Croatia. In the period 1961-1990 HI was up to 2400°C for the mid-Adriatic, up to 2000°C for the continental area and below 1600°C for mountainous area. In the last 30 years increase of HI is evident in the whole Croatia (up to 200°C). In the extremely hot years at the beginning of the 21st century earlier and later continental varieties ripened practically at the same time. The grapes had a very high sugar content, which resulted in wines with high alcohol content. Thus, in the near future in the continental part it could become possible to grow thermally more demanding red grape varieties, while earlier varieties could be cultivated in mountainous part.

Izvorni jezik
Engleski

Znanstvena područja
Geofizika

POVEZANOST RADA