Horttech02678 88..98
In temperate climates where heat Developing a Wine Grape Site Evaluation accumulation is adequate to ripen Decision Support System for the Inland wine grapes, winter cold damage may be the limiting factor for vineyard Pacific Northwestern United States survival. Phenology, cultivar, and tem- peratures preceding potentially dam- 1 1,3 2 aging low temperatures all influence Ian-Huei Yau , Joan R. Davenport , and Michelle M. Moyer risk of cold damage (Ferguson et al., 2011). Sites with lower extreme min- ADDITIONAL INDEX WORDS. remote site evaluation, site selection, viticulture, Vitis imum temperatures will generally be vinifera at greater risk for cold damage, which can range from loss of fruitful buds SUMMARY. Site selection is critical in wine grape (Vitis vinifera) production. The to outright death of the entire vine. wine grape industry is expanding in the inland Pacific northwestern United States The typical minimum temperature (IPNW) using traditional means of site evaluation including on physical examina- tion of topography, geomorphology, soil characteristics, and analysis of long-term threshold at peak dormancy for most observations from weather stations. Through the use of modeled spatial data, we wine grape cultivars is around –23 °C present a geographic information system (GIS) representing environmental features (Ferguson et al., 2011). Frost-free important for evaluating vineyard site suitability for the production of wine grapes. days (FFDs), the period between Elevation, slope, insolation, heat accumulation, growing season length, extreme the last spring and first autumn frosts minimum temperature and the soil parameters of drainage, available water-holding (0 °C), is frequently examined in capacity (AWC), depth to restrictive layer, and pH combine to represent composite determining the suitability of an area topographic, edaphic, and overall production suitability.
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