Vine Nutrition Flashcards
Nitrogen- macronutrient
Used for vine growth stops leaf yellowing light and sandy soils can be affected
Applied through foliage sprays and urea - Quinta do Vesuvio add through clover inter-row
Potassium- macronutrient
Acidic soils may not have enough
Needed for good growth and fruiting, sugar transport to berries. Deficiency causes stunted growth
Bichot stopped adding as thought it might cause premox Ridge and 420 doesn’t take up Potassium hard to establish but have low pH wines
Adding potash fertilisers
High potassium = pot magnesium uptake
Chapel Down use PV to adjust to the site
Phosphorous v insoluble.
Macronutrient for root growth and berry set.
High aluminium content in soils can make uptake hard. Hambrecht and Peterson in Sonoma apply monoammonium phsphate through drip irrigation
Calcium macronutrient for fruiting chalk soils high can cause iron deficiency chlorosis
Fercal rootstock at Chapel Down can handle 40% active chalk but can get iron deficiency so use a foliar feedChange of rootostocks for Vega Sicilia 41B
Magnesium macronutrient component of sugar needed to make chlorophyll
Gusbourne spray on because SO4 takes up poorly Te Awa spray
Iron micro used in photosynthesis and respiration
Hard in chalk soil Baron Sergio in Italy adds to irrigation water
Manganese micro used in nitrogen metabolism
High pH and lime soils can be deficient Chinese 2mg/lt limit so AWRI test foliar application Andrew Peace
Molybdenum micro for nitrogen metabolism less available in Acidic soils
Needed especially to avoid poorfruitset in merlot
Foliar fertiliser
Boron used in cell and leaf growth
Quinta da Roeda Boron deficient add 5kg boron per 100m2
Copper rarely deficient due to use in Bordeaux mix
Copper toxicity = reduced vigour in Bordeaux
Nutrition monitoring
Bos wine runs soil analysis on his compost. Chapel Down and PV Norton PV infrared and petiole analysis
