Is the beautiful exotic kapok suitable for introducing Xichang? If yes, what problems should be paid attention to in planting and management?

Nickname: Beauty Tree

Family and genus: kapok family, kapok genus.

Large deciduous tree, with a height of10-15m, swollen lower trunk, dark green bark of young trees, dense conical spines, and lateral branches extending radially horizontally or obliquely.

Palmately compound leaves have 5-9 leaflets; The lobules are oval and are 12- 14 cm long.

Flowers solitary, corolla purplish red, center white; Petals 5, reflexed, filaments fused to form stamen tube, surrounding style. Winter is flowering.

Capsule oval. The seeds ripen in the following spring.

Native to South America. The canopy is umbrella-shaped, the leaves are green, and the trunk of the adult tree is bottle-shaped; When flowers bloom in winter, trees are purple.

Beautiful, it is an advanced tree species beautified in courtyard greening.

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type

Generally, the method of sowing and breeding is adopted. In Guangzhou, its seeds mature in March and April, so it should be planted with the harvest, and the germination rate can reach 90%.

As time goes on, the germination rate will decrease.

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Sowing substrate adoption

Peat soil: sand = 3: 1, adjust the pH value to about 6.0, add 10 kg chicken manure and 2 kg compound fertilizer to each cubic meter of sowing substrate, mix and sieve. Because the seeds of Michelia Mirabilis are relatively large (the size of soybeans), the method of sowing on the sowing boat can be adopted, and the sowing density is 500 seeds/square meter. When sowing, the depth of sowing is the thickness of the seed itself. Too deep sowing will delay germination time and reduce germination potential. After the on-demand program was completed, mirex was sprayed 500 times for the first time.

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Protection and pests and diseases

Transplanting When the beautiful exotic kapok seedlings on the seedling container grow to a height of 15 ~ 25cm, they can be transplanted. First, transplant them into planting bags (or pots) for centralized management for 20 to 30 days, and then plant them in the field. When planting, the seedlings should be divided into three grades according to a certain height, and the seedlings of the same grade should be planted in the same field for management.

The growing season of exotic kapok is from March to September. In the peak season, the water supply should be sufficient. If the soil itself is fertile, you can apply 1 times of organic fertilizer (peanut bran, chicken manure, etc. ) and compound fertilizer once every 40 days to achieve the best growth rate. If the soil is thin and barren, organic fertilizer and compound fertilizer should be applied every 20 days to maintain the growth rate of seedlings. In the second growth cycle, the annual seedlings of the beautiful kapok can increase DBH by 3 to 4 cm within one year, with bright leaves and less pests and diseases.

There are not many pests in kapok, mainly the leaf-eating harm of scarabs. The harm of scarabs has a certain law: there are two peak periods every year, one is May-June, and the other is 9-65438+ 10. Scarabs come out at 6-8 pm, so we should seize this law to prevent and control them. During the peak period of pests, conventional pesticides (dimethoate and dichlorvos) are sprayed once a week, and the spraying time is arranged after 5 pm. Another way to control scarabs is to trap them with black lights. The beautiful kapok with weak tree will be hurt by the red spider. When it is attacked by the red spider, its leaves will turn yellow. To control the red spider, 800 ~ 1000 times of Miqingke solution can be sprayed.

There are few exotic kapok diseases, and a few individuals with poor growth will suffer from stem rot, and the whole trunk will rot and turn black. When this disease occurs, it is necessary to remove the diseased plants to prevent the spread, and then use carbendazim 800 times solution for prevention and control.