Grapevine nutrition management Flashcards
Why is nutrient management important in grapevine growth and viticulture?
Nutrients support vine growth, fruit development, yield quality, and resistance to diseases and environmental stress.
What are the three primary macronutrients required by grapevines?
Nitrogen (N) – Promotes vegetative growth, canopy development.
Phosphorus (P) – Supports root development, flowering, and fruit set.
Potassium (K) – Regulates water balance, berry ripening, and stress resistance.
What are the secondary macronutrients in grapevine nutrition?
Calcium (Ca) – Strengthens cell walls, prevents disorders like millerandage.
Magnesium (Mg) – Essential for chlorophyll production and photosynthesis.
Sulfur (S) – Helps with amino acid synthesis and disease resistance.
What are the key micronutrients in grapevine nutrition?
Iron (Fe) – Aids chlorophyll production, prevents chlorosis.
Boron (B) – Important for flowering and fruit set.
Zinc (Zn) – Helps enzyme function and shoot elongation.
Copper (Cu) – Plays a role in enzyme systems and disease resistance.
Manganese (Mn) – Supports photosynthesis.
What are the visual signs of nitrogen deficiency in grapevines?
Pale or yellowing leaves (chlorosis).
Weak shoot growth and reduced canopy density.
Smaller berries and lower yield.
What are the signs of phosphorus deficiency in grapevines?
Stunted root and shoot growth.
Dark green or purplish leaves.
Poor flowering and fruit set.
What are the symptoms of potassium deficiency?
Leaf margins turning brown or necrotic.
Poor sugar accumulation in berries.
Reduced vine stress tolerance (drought, cold).
What environmental factors influence nutrient uptake in grapevines?
Soil pH – Affects nutrient solubility (e.g., high pH can lock up iron).
Soil Moisture – Influences root absorption efficiency.
Organic Matter – Improves soil structure and microbial activity.
What are common methods for supplying nutrients to grapevines?
Soil Fertilization – Granular or liquid fertilizers applied to the soil.
Foliar Sprays – Direct nutrient absorption through leaves (e.g., zinc, iron).
Compost & Cover Crops – Organic matter improves soil structure and nutrient retention.
Drip Fertigation – Delivering nutrients through irrigation systems.
How can vineyards use sustainable practices for nutrient management?
Using organic compost and manure instead of synthetic fertilizers.
Implementing cover cropping to fix nitrogen and improve soil health.
Monitoring soil and leaf analysis to apply only needed nutrients.
