Die invloed van spesifieke grond en klimaats parameters op wingerdprestasie, wynkwaliteit en -karakter

[摘要] This thesis forms part of a research program that is investigated by ARC Infruitec-Nietvoorbij and the University of Stellenbosch. The aim of this program is toquantify the effect of soil and climate on wine quality and character as a basis forscientific demarcation of production regions. Natural factors are first quantified andcharacterised so that relative homogeneous natural terroir units (NTU) can beidentified. Thereafter wines made from these different localities are assessed forsimilarities which permit grouping of localities into viticultural terroirs.The present study involved seven research plots in the Robertson district, makinguse of initial measurements by ARC Infruitec-Nietvoorbij in the 2000/01 and2001/02 seasons together with more intensive measurements in the 2002/03 and2003/04. The seven plots are located in two wards, Le Chasseur and Vinkrivier.Sauvignon blanc plots were marked at two localities, each with two sub-plotsoccurring in one block. Three Cabernet Sauvignon plots were marked out. Twoplots occurred in one block in Le Chasseur and one plot in Vinkrivier. Plots withinthe same block were located on different soil types so that the effect of soil type onwine quality and character could be monitored. Morphological examination of soilprofiles at each plot was carried out together with physical and chemical analysis ofsamples taken at 30cm depth intervals. Soil water content was measured atregular intervals to assess soil water tension. Vineyard performance was assessedin terms of phenology, root system studies, leafwaterpotential measurements,canopy quality assessment, leaf analysis, shoot growth, and data relating toripening, harvest and pruning. Wines were made from each plot by ARC Infruitec-Nietvoorbij and evaluated by a tasting panel after six months and then again aftereighteen months. Meteorological data were collected in each ward.

[发布机构] Stellenbosch University