1. Fertilization Plan for High Grape Yields
1.1 Base Fertilizer (Foundation Fertilizer)
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Application Timing: Immediately after grape harvest in autumn
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Benefits:
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Promotes vine recovery
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Facilitates shoot maturation and flower bud differentiation
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Prepares vines for winter and supports growth in the following year
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Application Principle: Determine the amount based on soil fertility and fertilizer type
1.2 Root Fertilization (Four Applications Annually)
| Timing | Purpose | Fertilizer Type |
|---|---|---|
| First Application: After budding | Promotes shoot growth and flower bud differentiation | Nitrogen-based fertilizer |
| Second Application: Before flowering | Enhances pollination and fertilization, improves fruit set rate | Balanced phosphorus and potassium fertilizer |
| Third Application: During young fruit expansion | Supports fruit enlargement | High-potassium compound fertilizer |
| Fourth Application: At the onset of fruit ripening (color change stage) | Enhances coloring and sweetness, improves quality | Foliar fertilizer (e.g., Jintailiang) |
1.3 Foliar Fertilization (Key Supplement)
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Critical Stages: Before flowering, during young fruit stage, and at color change stage
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Recommended Fertilizer: Jintailiang foliar fertilizer
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Benefits:
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Increases fruit size and sweetness
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Enhances photosynthesis
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Improves yield and quality
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2. Key Management Practices for High Grape Yields
2.1 Orchard Cleanup (Reducing Pests and Diseases)
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Promptly remove pruned branches, dead stumps, and diseased leaves
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Collect and burn or bury them away from the orchard
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Strip old bark to reduce pest and disease sources
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Clear weeds along paths to eliminate overwintering pests
2.2 Vine Management
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Bud Thinning and Shoot Selection: Retain buds appropriately to balance nutrient distribution
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Topping and Training:
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Perform timely topping to control excessive growth
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Train vines as they grow
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Remove tendrils early to minimize nutrient consumption
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2.3 Cracked Fruit Prevention
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Causes of Cracked Fruit:
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Variety characteristics
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Sudden heavy watering after prolonged drought
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High-temperature conditions
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Preventive Measures:
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Apply chelated calcium-magnesium fertilizer
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Enhance grape disease resistance
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Can be applied before or after bagging without affecting efficacy
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3. Key Reminders
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Early Autumn Base Fertilization stimulates new root growth, laying the foundation for high yields the following year.
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Precise Fertilization: Select appropriate fertilizers based on the growth stage requirements.
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Integrated Management: Combine fertilization with vine management and pest control.
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Prevention-First Approach: Take proactive measures, especially against issues like fruit cracking.
By integrating scientific fertilization with meticulous management, grape growers can effectively improve fruit set rates, yield, and fruit quality, ultimately maximizing economic returns.
