Water Flashcards
Name the 5 roles of water in vine growth and development
1) photosynthesis
2) turgidity
3) dissolves nutrients and transports them
4) temperature control
5) medium for biochemical & physiological processes
How much water do vines need in a) cool climate
B) warm climate
A) 500ml a year
B) 750 ml a year
What is a rain shadow and give an example
The leeward side of a hill / mountain where the rain tends not to fall, as the moisture stays on the side of the prevailing wind
An example is cascade mountains in Washington State; Puget Sound on the west - wet and cool; Columbia valley on the east - warm and dry.
Describe evapotranspriarion. What weather favours it?
Evapotranspiration is the sum of water evaporation and transpiration from a surface area to the atmosphere. Evaporation accounts for the movement of water to the air from sources such as the soil, canopy interception, and water bodies. Transpiration accounts for the movement of water within a plant and the subsequent exit of water as vapor through stomata in its leaves
Hot, dry windy weather speeds this up.
What are the stomata and what role do they play in vine health?
They are little pores on the underside of the leaf through which water and O2 escape and CO2 comes in.
They control the rate of photosynthesis as they regulate the intake of CO2 and output of O2 and water. Too much outpouring of water from the stomata limits the intake of CO2.
How does excess water effect the soil and growing environment?
It will cool down the soil which can delay bud burst , wash away nutrients in the soil and kill the microorganisms by removing O2 in the soil, and also washes away soil weakening the plant’s stability.
What are the possible results of excess water early on in the ripening process?
1) pollination can be jeopardised s as the rain can wash away the pollen granules
2) in the growing time to on much water can cause excess green growth which will depleted the plants resources and east into the grape growing/ ripening period. It can also put stress on the vice structure as there is too much growth.
