What kind of fertilizer should be applied to apple trees after bagging? What is the best fertilizer to use for bagged apple trees?

What is the best fertilizer to apply after bagging apple trees?

Today, the editor will explain the best fertilizer to apply after bagging apple trees for green plant and flower planting. The details are as follows:

What is the best fertilizer to apply after bagging apple trees?

For orchards with a high yield of bagged fruit, it is generally recommended to apply 0.5~1 kg of phosphorus and potassium fertilizers per plant or spray 0.2%~0.3% potassium dihydrogen phosphate on the leaves to promote fruit coloring, increase sugar content, and enhance the intrinsic quality of the fruit. Bagged fruits are prone to calcium deficiency, which can easily trigger physiological diseases such as bitter pit, spot disease, watercore, fruit shrinkage, and red spot, making timely calcium supplementation very important.

How to top-dress after bagging

After the apple trees bloom and set fruit, go through the second fruit drop period, and then bagging. The bagging time for apples is generally about 45 days after blooming, usually from early to mid-June. So, how should we top-dress after bagging? What are the benefits of bagging?

1. Control nitrogen and increase phosphorus and potassium to improve fruit quality: Excessive application of nitrogen fertilizer can cause poor fruit coloring, reduced sugar content, rough flesh, low fruit hardness, and more physiological diseases during storage. Therefore, it is necessary to control nitrogen fertilizer in orchards with better fertility conditions.

Generally, the amount of fertilizer applied to fruit trees should be controlled to slightly below or slightly limiting yield levels, and appropriate amounts of phosphorus and potassium fertilizers should be applied.

For orchards with a high yield of bagged fruit, it is generally recommended to apply 0.5~1 kg of phosphorus and potassium fertilizers per plant or spray 0.2%~0.3% potassium dihydrogen phosphate on the leaves to promote fruit coloring and improve sugar content and intrinsic quality.

2. Timely calcium supplementation:

Bagged fruits are prone to calcium deficiency, which can easily trigger physiological diseases such as bitter pit, spot disease, watercore, fruit shrinkage, and red spot, making timely calcium supplementation very important.

Bagged fruit calcium supplementation should be done at three key periods:

1. Within 40 days after flowering, use a calcium nitrate solution at 300 times dilution, and spray the leaves 2-3 times.

2. During the summer, mix amino acid calcium with pesticides for foliar spraying or stem painting.

3. After removing the bags before harvest, use a calcium chloride solution at 300 times dilution for foliar application. To improve the absorption and utilization of calcium by fruit trees, adding 0.3% boron fertilizer or special effect king synergist to the calcium spray will yield better results.

3. Timely watering:

Appropriate watering during the growth period of bagged fruit is beneficial for fruit expansion. Make sure to water thoroughly 2-3 days before removing the bags.

Benefits of bagging apples

1. Bright and beautiful coloring, delicate and glossy fruit skin

Bagging can significantly improve fruit coloring, achieving full red fruit, smooth and beautiful fruit surface without russet, and good appearance. According to experiments, the proportion of fruit surface coloring greater than 75% accounts for 86.7%.

2. Prevent diseases and pests

After bagging, the fruit is isolated from the outside world, preventing the invasion of pathogens and pests, effectively controlling diseases such as ring rot, sooty mold, alternaria leaf spot, spot disease, peach fruit borer, and pear stinkbug.

3. Reduce hail damage

Hail often occurs during the young fruit stage. At this time, the fruit is small and suspended in the bag. When hail falls on the inflated bag, it reduces its mechanical impact, protecting the fruit from damage.

4.有利于生产绿色食品 (Conducive to the production of green food)

After bagging, the fruit does not come into direct contact with pesticides, and the number of pesticide applications can be reduced. Non-bagged orchards need to apply pesticides 8 times a year, while bagged orchards need only 4-5 times.

This can effectively reduce the residue of pesticides, conducive to the production of pollution-free green food, and laying the foundation for export.

5. High economic benefits

In recent years, the apple market has shifted from a seller's market to a buyer's market, and merchants have increasingly strict requirements for fruit quality. Some orchards, although high-yielding, have a low commercial rate and poor profitability.

Bagging can increase the commercial rate of orchards to about 90%, with delicate and glossy fruit skin, bright coloring, excellent appearance, low pesticide residue, high selling price, and easy (C-S).

From last year's market situation, bagged fruit prices were about double those of non-bagged fruit and in high demand. Strict control in the later stages of fruit growth, especially near maturity, is beneficial for fruit coloring.

The above sharing on the best fertilizer to apply after bagging apple trees is hoped to be liked by everyone!