1、Effects of Spraying Calcium Fertilizer on Photosynthesis, Mineral

Spraying calcium fertilizer increased the sugar content and decreased the acid content of the apples. Naipu 9 was more effective at increasing fruit sugar content, especially sucrose and sorbitol, while Niucui was more effective at reducing the acid content, especially malic acid.

2、How to Apply Foliar Fertilizer After Bagging Apple Trees

To ensure healthy growth and fruit production in apple trees, apply commercial fertilizer in the spring before new growth begins and organic fertilizers in the fall after fruit has been harvested.

3、Optimizing water–fertilizer integration at key growth stages for

A two-year field trial was conducted comparing five treatments: traditional farmer practice (TF), optimized fertilization (OF), OF with calcium–magnesium spraying (OFS), OF with water–fertilizer integration (OFI), and OF combined with calcium–magnesium spraying and water–fertilizer integration (OFSI).

4、喷施不同钙肥对富士苹果果实品质和矿质元素含量的影响

[Conclusion] Spraying calcium fertilizer can significantly improve the quality of Fuji apples,and also affect the content of each element and its correlation in ＇Fuji＇ fruit.

Effects of Spraying Different Calcium Fertilizer on the Quality

[Conclusion] Spraying calcium fertilizer can significantly improve the quality of Fuji apples,and also affect the content of each element and its correlation in 'Fuji' fruit.

Apple bagging management

Potassium sources include potassium dihydrogen phosphate and potassium sulfate, while calcium sources are imported calcium nitrate and foliar calcium. Late calcium application is essential, as young fruits absorb only 30% of calcium early on, with 70% absorbed later.

<br>优化“红富士”苹果品质：装袋实践中生长素介导的钙通过

To elucidate that how auxin affects Ca forms and distribution in the apple fruit stalk, we investigated the effects of different concentrations of auxin treatment (0, 10, 20, and 30 mg·L −1) on Ca content, forms, distribution, and fruit quality during later stages of fruit expansion.

Pay attention to these points before apple bagging!

Before and after bagging, fruit trees should be sprayed with calcium fertilizer several times in combination with spraying to reduce the occurrence of bitter acne disease and hydrocardiasis.

Effects of Spraying Calcium Fertilizer on Photosynthesis, Mineral

Spraying calcium fertilizer promoted the accumulation of Ca, Mg, and B mineral elements in leaves and fruits while inhibiting the accumulation of Cu. Spraying calcium fertilizer...

[PDF] The effect of late spraying with calcium nitrate on mineral

The effect of late spraying with 0.8% Ca (NO3)2 on calcium content as well as nutrient mutual relations between mineral constituents in ‘Elise’ fruit of 5 year old apple tree were studied.

Apple bagging is a horticultural technique used to prevent pests and diseases, reduce pesticide use, and improve fruit quality. Proper calcium fertilizer spraying after bagging promotes fruit development, enhances firmness, and improves storage and transportability. Below is a detailed guide on the best timing, methods, and precautions for calcium spraying post-bagging.

I. Optimal Spraying Time

1. 2-3 Days After Bagging (First Week)

The first 3 days after bagging are critical for calcium absorption. At this stage, fruits are still developing and have high calcium uptake capacity. Spraying calcium solutions during this period boosts growth, firmness, and storage life.

2. 7-10 Days After Bagging (Second Week)

By days 7-10, fruits near maturity, reducing calcium absorption efficiency. continued spraying ensures adequate calcium reserves and nutrient accumulation, maintaining flavor and quality.

II. Spraying Methods

1. Select Appropriate Calcium Products

Choose from commercial calcium solutions like calcium magnesium phosphate or calcium sulfate. Calcium sulfate is preferred due to its high solubility and absorption rate.

2. Adjust Concentration Based on Tree Size

• Young/small trees: Use lower concentrations.
• Mature/large trees: Higher concentrations may be applied. Test and adjust based on tree response.

3. Ensure Uniform Coverage

Use sprayers or manual tools to cover all fruit surfaces evenly. Avoid over-spraying to prevent waste.

III. Precautions

1. Avoid High-Temperature Spraying

Spray during cool periods (morning or evening) to prevent rapid evaporation and nutrient loss.

2. Prioritize Safety

• Wear protective gear (gloves, masks, clothing) to avoid inhaling dust or chemicals.
• Work in well-ventilated areas.

3. Monitor Fruit Health

Regularly check for abnormalities (e.g., slow growth, discoloration). Address issues promptly by adjusting spray frequency or concentration.

Post-bagging calcium spraying is vital for fruit quality. By selecting suitable products, optimizing concentration, ensuring even coverage, and following safety guidelines, growers can maximize calcium uptake and produce high-quality, storable apples.