The latest course on planting techniques and methods of Phellodendron chinense

Euphorbia angustifolia is an important ornamental red leaf tree species in China, also known as Phellodendron chinense, Huangchutai, Molinluo, etc., it is a small deciduous tree or shrub of the genus Phellodendron in the lacquer family. The famous Xiangshan red leaf in Beijing is this kind of tree species. It is suitable to be planted in lawns, mounds or hillsides in the garden, and can also be mixed in other tree groups, especially evergreen trees. Let's take a look at the planting techniques of Phellodendron chinense.

Growth habits of Phellodendron chinense

Phellodendron chinense is light-loving, semi-shade-tolerant, cold-tolerant, drought-resistant, barren and alkaline soil, not resistant to water and moisture, so it should be planted in sandy loam with deep soil layer, fertile soil and good drainage. It has fast growth, developed root system and strong sprouting ability. It has strong resistance to sulfur dioxide. In autumn, when the temperature difference between day and night is more than 10 ℃, the leaf color turns red. It is native to southwest China, North China and Zhejiang, as well as southern Europe, Syria, Iran, Pakistan and northern India.

Propagation method of Phellodendron chinense

1. Sowing: Phellodendron chinense can be collected after its fruit is ripe from June to July and sown after 40-60 days of wet sand storage. The cold resistance of seedlings is poor, so it is necessary to cover leaves and straw before winter.

2. Ramets: the sprouting ability of Phellodendron chinense is very strong. Before sprouting in spring, select the roots growing outside the trunk, dig up the roots, plant them in the nursery, and then plant them.

3. Cuttings: Phellodendron chinense is planted with hard branches in spring and needs to build a plastic arch shed for heat preservation and moisturization. In the growing season, under the condition of spray, twigs with leaves can take root in about 30 days.

Planting technique of Phellodendron chinense

1. Water management: after the seedlings are unearthed, there should be sufficient irrigation in the early stage of seedling growth, but within 20 days after the seedlings are unearthed, irrigation should be strictly controlled to reduce irrigation as far as possible without drought damage, and the interval time depends on the weather conditions. it is usually watered once every 10 to 15 days. Watering should be properly controlled in the later stage to facilitate squatting seedlings and overwintering. In the autumn when Rain Water is more, attention should be paid to drainage to prevent stagnant water from causing root rot.

2. The seedlings should be closely planted, and the seedlings should be divided into 2 times. The first seedling should be carried out when the seedlings grow 2-3 true leaves. In the second time, the seedlings were carried out when the leaves overlap each other, leaving the good and getting rid of the poor growth, diseases and insect pests, mechanical damage and overdensity, at the same time keeping a certain distance between the seedlings, the plant distance should be 10 cm. In addition, it can be combined with primary or secondary seedlings to supplement seedlings, preferably in cloudy days or in the evening.

3. Weeding and topdressing: according to the principle of "a small amount of fertilizer for many times, first less and then more", the early stage of seedling growth is dominated by nitrogen fertilizer and phosphate fertilizer, the fast-growing stage of seedlings should be mixed with nitrogen fertilizer, phosphate fertilizer and potassium fertilizer, and the hardening period of seedlings is dominated by potash fertilizer. Stop applying nitrogen fertilizer in order to promote the Lignification of seedlings and improve the cold resistance and overwintering ability of seedlings. Weeding should follow the basic principle of "get rid of early, small, except". Weed should be removed when there is grass, irrigation should be done carefully, and seedlings should not be damaged, resulting in the death of seedlings.

Control of diseases and insect pests of Phellodendron chinense

1. Aphids

[harm] harms leaves, tender stems, flower buds and terminal buds, causing leaves to wrinkle, curl, galls and shedding, and in serious cases, leading to plant withering and death.

[prevention and treatment] 40% omethoate can be sprayed in large quantities, dimethoate, 50% malathion emulsion or 40% acephate 1000 × 1500 times, or 1000 × 2000 times of rotenin, every 15 days from May to August.

2. Blight

[harm] cause root or root neck cortex to rot, and in serious cases cause wilting and death of diseased seedlings.

[prevention and treatment] Clean the garden, treat the diseased plants in time, spray 50% carbendazim 50% wettable powder 500 / 1000 times or spray 1 / 100 / 120 Bordeaux solution every 10 to 15 days.

3. Powdery mildew

[harm] at the initial stage, the leaves appeared needle-like white powder spots, which gradually expanded into dirty white round spots, and radiated around the disease spots. In the later stage, the disease spots were connected into pieces, and in severe cases, the whole leaf was covered with a thick layer of white powder.

[prevention and treatment] at the initial stage of the disease, 20% triadimefon was sprayed once, and the period of validity was up to 2 months. Or spray 70% methyl topiramate 1000-1500 times several times.

4. Fusarium wilt

[harm] Fusarium oxysporum wilt is an important disease of red leaves in Xiangshan, which seriously affects the landscape of red leaves and dies quickly.

[prevention and control] dig out the seriously diseased plants and burn them to reduce the source of infection. Plant disease-resistant varieties. The soil was treated with soil fumigant and then planted.