engleski

"Terroir" and quality of grape and wine of Istrian Malvasia

Istrian peninsula is a region with very different agro-ecological conditions for viticulture production. As soil groups, three main groups exist on peninsula - west part of peninsula with specific Mediterranean red soils, "terra rossa" , central part of peninsula with soils rich with calcium carbonate and east part of peninsula with shallow dark soils on limestone rocks. The vineyards are present on different altitudes, from sea level to more of 400 m above sea. All this parameters significantly influence agro- ecological conditions of small location and grape quality too. Four specific locations have been chosen for this research. Those are: Pula - southern part of Istrian peninsula, with shallow red soils and low amount of rain in vegetative period, Višnjan - western part of peninsula, with specific deep red soils with good chemical and physical properties, Motovun - central part of peninsula, with gray "flysch" soils, rich with limestone and cold winter period and Buje - northwestern part of peninsula, with brown soils, good chemical and physical properties and good rain distribution through year. Growing form on all locations was Guyot double branched. From each locations, on years 2002 and 2004, productive and grape quality parameters were analyzed. Analyses of wines produced from four specific locations included physico-chemical analyses (vol. % of alcohol, total and volatile acidity, total dry extract and residual sugar content) and gas chromatographic analyses of secondary aroma compounds (volatile esters, higher alcohols and fatty acids). From results obtained it can be seen that grapes and wine from location named Buje had the highest quality. For complete discussion of importance of "terroir" , climatic and soils main parameters were analyzed, too. The results obtained confirm the importance of "terroir" and the influence it has on grape and wine quality.

terroir ; Istrian Malvasia ; volatile esters ; higher alcohols ; fatty acids

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