1, Miao?

① Seedling propagation: it is widely used at present, but its offspring have variation. The big seeds with good fruit development in the lower part of the trunk germinate well. Seeds are easy to lose germination ability, so they should be washed and dried, preserved with wet sand or sown immediately. After seed storage15 days, the germination rate was 70%. After 30 days, it dropped to 40%. gallium (Ga)

(2) High-pressure propagation: it is rarely used at present and has the advantages of dwarfing plants, convenient management, early fruiting and good germplasm; The disadvantage is that it has no roots and is not wind-resistant.

(3) Grafting propagation: The patch budding method is often adopted, and the buds of l-2 year-old corked or semi-corked branches are selected for budding. When using this rootstock, we should pay attention to the fact that the milk of pineapple affects the survival of bud grafting. We can cross-cut a knife above the bud grafting part to exclude the milk before bud grafting. The grafting period can be carried out except in rainy and cold seasons, and the grafting position should be low.

(4) Cutting: 30 days before cutting, ring cutting and yellowing are carried out, and 2000mg/L ferulic acid +3000mg/L is used before cutting. 90% hairy roots can be obtained by IBA rapid soaking (Dhuat al. 1983).

2. planting?

Because of the large crown, it is vulnerable to pests and diseases for ventilation and light transmission. The planting period is mostly in June-August, and the spacing between plants is 5 m× 7 m. If it is too dense, the branches will be few and weak, and the seedlings will grow quickly due to high temperature and rain. Before the arrival of the low temperature and dry season, the seedlings have recovered their vitality and can grow rapidly in the next year. When transplanting seedlings, it is necessary to avoid damaging the main roots. If white latex juice flows out after injury, the survival rate of seedlings is low. In this case, farmers often burn their mouths with fire, so that the chewing gum will solidify and stop flowing to prevent water loss. After planting, young branches and leaves should be protected to avoid pests and livestock, and attention should be paid to irrigation, antifreeze and strengthening tree tray management. Young trees need proper shade environment, and short-term fruit trees such as pineapple and banana can be planted between rows.

3. fertilization?

Farmers mostly plant in front of the house and behind it, and generally seldom apply fertilizer. However, due to the lush plants, many fruits and high nutrient consumption of trees, fertilizer should be applied at least once before flowering and fruit storage to supplement nutrients. In June of 5438 in Xiadian+February of last year, the fertilizer before flowering was applied in the open-loop ditch under the crown, and the fertilizer after fruit was applied at the end of July, combined with available nitrogen and potassium fertilizers, and applied in shallow holes.

4. Flower promotion treatment?

In order to promote the flowering and fruiting of pineapple, farmers often smoke near the tree head to increase the concentration of co and increase the accumulation of photosynthetic products. Or cut the trunk with a knife to cause bleeding (don't hurt the xylem) to achieve more flowers and more fruits.

Extended data:

Jackfruit (Latin name: jackfruit? Lamentations of Jeremiah), an evergreen tree of Moraceae and Paramita. The height of the tree is 10-20m, and the bark is dark brown. Leaf leather oval, spiral arrangement; Flowers are monoecious, and when the fruit matures, the epidermis is yellow-brown, and there are tumor-like processes and coarse hairs on the surface.

Jackfruit is a tropical fruit and the heaviest fruit in the world. It generally weighs 5-20kg, and the heaviest fruit is over 59kg. The pulp can be eaten fresh or processed into canned food, preserved fruit and juice. Seeds are rich in starch and can be cooked; Sap and leaves can be used medicinally to reduce swelling and detoxify; The pulp has the effects of quenching thirst, promoting lactation, invigorating middle warmer and benefiting qi; Jackfruit is a beautiful shade tree and street tree with neat tree shape, thick crown and strange fruit. A century-old jackfruit tree with golden wood and hard material can be used to make furniture and yellow dyes.

References:

Baidu encyclopedia-jackfruit