Potted apples generally bear fruit in 2 to 3 years, and apples born in 4 to 5 years will bear 15 to 25 fruits per plant. Cultivation techniques

The techniques are as follows:

1. Select pots and configure nutrient soil

Choose tiles with a diameter of 40cm, a bottom diameter of 35cm, a height of 30cm, and drainage holes. Basins, barrels, wooden boxes. Nutritional soil preparation: 6 parts of fertile mature soil, 2 parts of river sand, 1 part of decomposed sheep dung, 1 part of soaked leaves and horseshoe fermented fertilizer

, in proportion Mix well and sift.

2. Potting

Choose seedlings with strong plants, full buds and no pests and diseases, and plant them in pots in early to mid-April. When planting

Dip the roots with 5-degree lime sulfur mixture to disinfect, and cut off the necrotic roots. First put a small amount of nutritious soil into the bottom of the pot, then add the seedlings, spread the roots evenly, bury the soil firmly, and water in time to ensure survival.

3. Fertilizer and water management

Apply 0.2% quick-acting nitrogen fertilizer once before and after germination. Starting from May, topdress liquid fertilizer once every 10 days or so.

< p>200 times liquid organic cake fertilizer is mainly used, supplemented by 0.2% each of inorganic liquid fertilizers such as urea, diammonium, and ammonium sulfate. During the fruit expansion stage

Foliar spraying of fertilizer can be carried out, with 0.3% to 0.5% urea and 3% to 5% plant ash leach solution. In autumn, when the shoots are long and the fruits are close to maturity, apply 200 times organic liquid fertilizer once every half a month. When the new shoots stop growing and the fruit matures, according to the growth conditions of the plant, topdressing is performed every 10 days, mainly 200 times organic liquid fertilizer, combined with 0.2% inorganic nitrogen fertilizer.

The soil for potted apples should be watered thoroughly after it dries out, and water should be replenished in time during the germination, flowering and fruit expansion stages

In order to promote the differentiation of flower buds, water should be controlled appropriately in June; watering should be less during the rainy season from July to August.

4. Plastic pruning

Potted fruit trees can be pruned into a bonsai tree shape according to personal preferences. Pay attention to the angle opening to allow ventilation and light transmission

, which is beneficial to Form flower buds and obtain high yields.

To control the canopy of potted apples, it is advisable to control the canopy of apples from one-year-old seedlings. The height of the stem should be equal to the height of the pot or twice as high as the pot.

Use the coiled branch method. Suppress growth and promote branching. One-year-old seedlings can also be topping according to the required height to promote the growth of the trunk and the growth of new branches. For new branches, the branches should be pulled to cultivate the tree shape; for leggy branches and competing branches, twisting between 5 to 7 leaves of the branches can effectively control the height of the tree, prevent leggy branches, and promote flower buds. ; Make full use of the vigorously growing leggy branches and competitive branches, and combine pulling branches for twisting, topping, carving, and girdling to cultivate a large number of fruiting branches, and Promote the formation of flower buds to achieve the purpose of early and multiple results. When potted apples enter the fruiting period, the tree shape has been basically established. Branches should be properly selected according to the variety so that the entire canopy space is occupied and properly utilized. The long branches with space can be reserved for cultivating new skeletons, and the medium and short branches can be cultivated as fruiting branch groups to keep the tree's crown stable and achieve an alternating long and short branches with an appropriate leaf-to-fruit ratio.

5. Flower and Fruit Management

1. Artificial pollination: 2 to 3 days before apples bloom, pollen is collected from orchards with similar phenological stages, and artificial pollination is carried out in the morning when the potted apples are in early bloom and the flowers bloom.

2. Spray boron during the flowering period: Spraying with 0.25% borax during the flowering period can increase the fruit setting rate.

3. Bagging: Fruit bagging is carried out after physiological fruit drop. Remove the fruit bag 15 to 30 days before the fruit matures to color the fruit.

6. Prevention and control of pests and diseases

Potted apples have fine management, good ventilation and light transmission, strong growth, and fewer pests and diseases. Once pests and diseases occur

Remove diseased branches, leaves, and fruits in a timely manner, scrape off diseased spots, and capture pests manually.

When diseases and insect pests are serious, spray carbendazim, thiophanate, chlorothalonil and other fungicides 1 to 2 times after the flowers fall to prevent and control fruit and leaf diseases; April to May Spray insecticides based on pyrethroids twice to control aphids, leaf rollers and other pests; spray 1 to 2 insecticides and acaricides such as Saoli and Uranus from June to July Secondly, control spider mites and peach heartworms; from July to August, spray fungicides such as polybendazim, thiophanate, and Bordeaux mixture to prevent and control early leaf disease, ring rot, and anthracnose.