Influence of weather conditions, on fertility of grape vine winter buds
2007
Kuljancic, I.,Poljoprivredni fakultet, Novi Sad (Serbia) | Papric, Dj.,Poljoprivredni fakultet, Novi Sad (Serbia) | Korac, N.,Poljoprivredni fakultet, Novi Sad (Serbia) | Todic, S.,Poljoprivredni fakultet, Beograd - Zemun (Serbia) | Medic, M.,Poljoprivredni fakultet, Novi Sad (Serbia) | Bozovic, P.,Poljoprivredni fakultet, Novi Sad (Serbia) | Ivanisevic, D.,Poljoprivredni fakultet, Novi Sad (Serbia)
The aim of this investigation was to find out the influences of heat and water precipitation on the potential fertility differentiations, which happens with buds necessary for next pruning, from the middle May until the beginning of July. Investigations which started in 1997, there are still carring out at the Experimental Field of the Institute for Fruit Growing, Viticulture and Horticulture, Faculty of Agriculture in Novi Sad, Serbia, which lies in the northern part of Fruska Gora vineyard area, in Sremski Karlovci (Serbia). New designed cultivars Sila, Nova Dinka and Riesling Italian clone SK-13 were examined. By counting the inflorescences on the example of 15 grape vines per variant, coefficients of fertility per cultivars were calculated, and their values per years were compared. By analysing meteorological factors (heat and water) and coefficients of fertility for the examined period, exceptional connection between them was established. In the years when there was a lot of rain in the May and June, and when they were followed by low temperatures in this period, potential fertility or fertility for the next year, was very low. In some cases it was 50 and more % lower then average values. In the years when temperature conditions, and water precipitations in the May and June were good, next year, coefficients of fertility in all buds were high. To reduce negative influence of bad weather in some years, grapegrowers must help to the grape vine by using all measures of agro and especially phytotechnique.
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