1、Fall Nutrient Sprays in Tree Fruit

Carbon (C), oxygen (O), and hydrogen (H), taken up in the form of carbon dioxide (CO2) and water (H2O), are the most important nutrients for tree fruit growth and development, representing more than 95 percent of the tree dry matter (Marschner 2002).

2、Effects of Foliar Fertilization: a Review of Current Status and Future

Comprehensive studies have shown that spraying chelated fertilizer on leaves can reduce the total amounts of fertilizer applied and achieve high fertilizer efficiency.

3、Foliar spraying of potassium sulfate during fruit development

Potassium sulfate (K2 SO 4) is the best source for potassium supplementation to improve citrus fruit quality. Six-time K 2 SO 4 foliar application throughout fruit development noticeably increased the fruit quality, specifically sugar accumulation.

How to Fertilize Fruit Trees in the Spring for a Bountiful Harvest and

Unlock the secrets to a thriving harvest with our comprehensive guide on fertilizing fruit trees in spring. Discover the essential nutrients your trees need, learn about organic vs. synthetic fertilizers, and find out when and how to apply them for maximum growth.

Foliar fertilizer spraying technology and issues that need attention

For example, cabbage, spinach, shepherd's purse, etc. require more nitrogen. Spraying fertilizer should be mainly urea and ammonium sulfate. The spraying concentration of urea should be 1~2%, and ammonium sulfate should be 1.5%. Spray 2~4 times per season, preferably in the early growth stage.

What Fertilizer for Fruit Trees: Essential Tips for Healthy Growth and

Learn about the best organic and synthetic fertilizers, their nutrient profiles, and the optimal application methods, including soil and foliar techniques. We provide timely recommendations for spring, summer, and fall, along with signs your trees might need a nutritional boost.

How to Fertilize Fruit Trees in Spring: Essential Tips for a Bountiful

Yes, young fruit trees generally require fertilizers higher in phosphorus to encourage good root development, whereas mature trees benefit more from nitrogen to promote fruit production and potassium for overall health and disease resistance.

What Foliar Fertilizer is Best for Spraying During the Citrus Tree

Discover the best fertilizers for citrus trees to boost their health and fruit production. This comprehensive guide explores organic and synthetic options, compares popular brands, and discusses critical factors like soil type and climate.

Properly Timing Foliar

The goal has been to time the application offoliar fertilizers to key stages of citrus (Citrus sp.) and avocado (Persea americana) tree phenology when demand for the nutrient is likely to be...

11 Best Fruit Tree Fertilizers

We’ve covered all different types of fruit tree fertilizers and the 11 best ones we’ve found on the market, based on carefully researched customer feedback, ease of use, and value for money.

In agricultural production, rational fertilization is key to improving crop yield and quality. Foliar fertilization is an efficient method of applying nutrients, capable of rapidly replenishing essential nutrients for plants and promoting crop growth. During the second fruit drop period, the choice of foliar fertilizers becomes particularly critical. Below are some recommendations:

I. The Importance of Foliar Fertilization

Foliar fertilization directly delivers nutrients to plant leaves, enhancing nutrient uptake efficiency and stimulating growth. During the second fruit drop period, it effectively mitigates fruit drop caused by nutrient deficiencies, while improving fruit quality and yield.

II. Selecting Appropriate Foliar Fertilizers

1. Nitrogen Fertilizers Nitrogen is vital for cell division, chlorophyll synthesis, and photosynthesis. During the second fruit drop period, proper nitrogen application promotes flower bud differentiation and fruit retention. excessive use may lead to excessive vegetative growth, compromising fruit quality.

2. Phosphorus Fertilizers Phosphorus supports root development and fruit maturation, enhancing disease resistance and fruit quality. During this period, phosphorus aids fruit expansion and improves stress tolerance (e.g., drought and cold resistance).

3. Potassium Fertilizers Potassium regulates water balance, sugar transport, and accumulation, significantly improving fruit flavor and color. It also strengthens disease resistance and reduces infection risks.

4. Micronutrients Elements like boron, zinc, and iron play critical roles in metabolic processes, influencing fruit quality and pest resistance. Targeted micronutrient sprays enhance yield and nutritional value.

5. Compound Fertilizers These provide balanced nutrients tailored to different growth stages. During the second fruit drop, compound fertilizers ensure comprehensive nutrient intake, optimizing resource use and reducing waste.

6. Water-Soluble Fertilizers Highly soluble and easily absorbed, these fertilizers enable rapid nutrient uptake. They are convenient to apply and environmentally friendly, minimizing pollution risks.

7. Bio-Organic Fertilizers Rich in beneficial microbes and organic matter, they improve soil structure and fertility. During this period, they boost root development, suppress pests, and align with eco-friendly agriculture goals.

8. Seaweed-Based Fertilizers Seaweed extracts supply minerals and trace elements, supporting growth and disease prevention. Their natural antibacterial properties help safeguard plants.

9. Enzyme Preparations As biological catalysts, enzymes accelerate nutrient transformation and absorption. They enhance stress tolerance and overall plant health.

III. Methods and Techniques for Foliar Spraying

1. Timing: Apply in early morning or late afternoon to reduce evaporation and leaf damage from sunlight.
2. Dilution: Follow label instructions for concentration; improper ratios reduce effectiveness.
3. Coverage: Spray uniformly, especially on leaf undersides, to ensure balanced nutrition.
4. Weather: Avoid rainy or windy conditions to prevent loss; prioritize sunny days.
5. Safety: Wear gloves and masks; avoid skin/eye contact. Rinse immediately if exposed.
6. Heat Precaution: Avoid midday heat to prevent leaf scorching.
7. Frequency: Do not over-apply; stick to scheduled doses to avoid excess.
8. Monitoring: Observe plants post-application for discoloration or wilting, and address issues promptly.

IV. Key Considerations

1. Follow Labels: Adhere to usage guidelines for optimal results.
2. Crop-Specific Needs: Tailor fertilizers to crop type, growth stage, and soil conditions.
3. Environmental Factors: Adjust for temperature/humidity to maximize absorption.
4. Avoid Overfertilization: Excessive application disrupts growth balance.
5. Soil Testing: Regularly check pH and nutrient levels to refine practices.
6. Synergistic Mixing: Combine fertilizers (e.g., nitrogen + phosphorus) for enhanced efficacy.
7. Safety Protocols: Store chemicals safely, use protective gear, and seek medical help for exposure.
8. Eco-Friendly Choices: Prioritize low-toxicity, sustainable options to minimize environmental impact.

Foliar fertilization is a cornerstone of agricultural productivity, especially during the second fruit drop period. By selecting suitable fertilizers and applying them correctly, farmers can maximize fruit quality and yields. Adherence to scientific principles and safety measures ensures sustainable success.