Viti/Viniculture Flashcards
Vines prefers a mean annual temperature of?
50-68F, w/ ideal of 57F
To successfully ripen, red grapes require an average summer temperature of…white grapes?
70, 66F
Minimum amount of sunshine required to support viticulture
1,300hrs
requirement of rainfall?
10-30in
how does too little rain effect the vine?
water stress will occur: promotes smaller berry size and yields but will lead to inte
How does too much rain effect the vine?
it will dilute fruit quality and create a friendly environment for fungal diseases.
How does wind effect the vine, both positive and negative?
Negative- undermine flowering and denude the vines.
Positive- minimize the effects of mold and mildew and move out settled cold air around the vines
Terroir comprise of
the choice of grapevine as it relates to location, topography, soil, climate, and the hand of man upon it.
Macroclimate:
Macroclimate varies in size depending on the factors affecting it: the Rheingau, on a single south-facing slope. Napa Valley may be divided into several distinct macroclimates between the different peaks and valley floor. .
Mesoclimate:
climate of a particular vineyard - more important than macro
How does slope and aspect effect the vine?
Slopes provide good drainage and may benefit from increased sunshine, but temperature falls steadily with added altitude. the aspect effects the intensity and duration of sunshine which in turn effects ripening.
Microclimate
the restricted space including all parts of the vine above the ground.
How do canopy management techniques effect microclimate?
effects exposure to sunshine and yield. this is man’s hand of effect on terroir.
In general, what type of soil is best suited for viticulture?
low-fertility, well-drained, easily penetrable soils with good water retention.
How does limestone effect soil?
limestone rich soils have a high pH, which adversely effects the vines, leading to low pH or high acid fruit.
Describe selection Massale, where is it most popular
grower to select budwood for replanting from a number of vines throughout the vineyard, rather than single clones. In mass selection, a grower will attempt to reinforce positive traits and eliminate negative traits through appropriate selection—and while the results may be less precise than those gained through clonal selection, a broader genetic diversity is maintained. The budwood selection, or scion, is then usually grafted onto separate rootstock. - Burgundy
Maturation in years of vines? roots?
3 years, 6 years, 10 years