Cultivation techniques of Catalpa chinensis
The ornamental value, medicinal value and greening value of catalpa tree are very high, but most people do not know enough about catalpa tree, but this does not mean that we can ignore the existence of catalpa tree and the benefits that catalpa tree can bring to our life. Therefore, with the gradual increase in the number of people who know catalpa tree, the planting number of catalpa tree is also increasing. Therefore, the planting technology of catalpa tree has become a very practical knowledge.
1. Planting of Catalpa chinensis
The planting of catalpa trees can be carried out in spring and autumn. Planting holes should be dug before planting, and planting with soil balls can improve the survival rate, but we should also be careful not to plant too deep, which will lead to muggy buds. When planting, we should also apply some mature base fertilizer and mix it with the planting soil, water once after planting, and then water again after three days and five days.
2. Water and fertilizer management of Catalpa chinensis.
In the daily maintenance, attention should be paid to the water management of catalpa trees. In addition to the first three water after planting, we should also choose to water twice between May and October. When there is more precipitation in summer, if it is not too dry, we do not need watering, and we should also apply anti-freezing water in winter. Just pour the green water and antifreeze water after four years of the plant. In addition, catalpa trees like fertilizer, apply sufficient base fertilizer when planting, and apply some urea in May, which can make the plant luxuriant branches and leaves and accelerate the growth.
3. Shaping and pruning of Catalpa
Because the catalpa tree has strong sprouting power, it is resistant to pruning. When the new branches reach about 30 cm in spring, the suitable main branches will be cut off, and the newly drawn buds should also be erased during the growing period. If you want to expand the crown, it is necessary to truncate the main branch and leave the outer bud.
4. matters needing attention in catalpa tree culture.
Catalpa trees are also vulnerable to the threat of diseases and insect pests, common pests are bug bugs, moth, paulownia tortoise shell, catalpa beetle wild borer and so on, which can be controlled by spraying insecticidal agents. In addition, the common disease of catalpa tree is anthracnose, which is easy to occur under the condition of high temperature and poor ventilation, so in addition to spraying pesticides, we should also pay attention to the water and fertilizer management of catalpa tree to improve the disease resistance of the plant.
5. Grafting propagation of Catalpa chinensis
The grafting of catalpa can be carried out in winter or spring, and the bud grafting can be carried out in spring or late autumn. In winter, it can be stored in wet sand after indoor grafting, and then planted in early spring. It is better to be grafted before and after the Qingming Festival, and the survival rate of sealing soil is higher. In addition, split grafting can be carried out, that is, the scions and rootstocks are prepared, and the cambium is tied up with hemp rope and plastic rope, and sealed with wet soil. It can sprout in about 10 days.
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