When to plant locust trees?

Question 1: Sophora japonica planting time. Depending on the sophora japonica planting method, the planting time is also different.

1. Sexual reproduction

Seed selection: Generally in October, select strong plants, pick their mature and full fruits, then soak them in water, wipe off the peel, wash and dry in the shade ,spare.

Germination: Soak the seeds in warm water of 70-80℃ for 24 hours, remove them and mix them with 2-3 times of fine sand, mix well, and stack them indoors or in a sunny place; they can also be stored in ditches, usually with a ditch width of 1 meters, 50 centimeters deep, and any length. After placing the seeds, cover them with wet sand and plastic film. During the germination period, it is necessary to turn over frequently, adjust the temperature and humidity, keep the top and bottom consistent, and ensure neat germination. It usually takes 7-10 days. When the seeds are 25-30% cracked, they can be sown.

Seedling cultivation: usually in spring and autumn. There are three methods: border cultivation, field cultivation and nutrition cup. If there is water source, you can use drill sowing on the border, with a sowing width of 10-15 cm, covering with 2-3 cm of soil. After sowing, suppress the soil to maintain moisture, and the seeding rate per acre is 10-15 kg; there is also on-demand sowing on the border, with a hole spacing of 10-15 cm, and sowing per acre. Quantity 4-5 kg. If there is no water source, you can raise seedlings in the field and directly dig ditches. The method is the same as drill sowing on the border. It is carried out in early spring or before freezing. The seeds can germinate early and emerge uniformly without accelerating germination. Using nutrition cups to raise seedlings will have better results. Before emergence, keep the soil moist and pay attention to insect pests.

2. Asexual propagation

Use root tillers to propagate by divisions. Dig the root seedlings of mature trees and open holes according to the row spacing of 1.8×1.3 meters, with one plant in each hole. The planting method is the same as the sexual reproduction method. It usually takes 4-5 years to mature. For alkaline soil, the soil shape can be changed at the planting site to ensure survival.

3. Transplanting fake plants

In the north, after the leaves have fallen in autumn and before the soil freezes, seedlings need to be raised and fake plants overwintered. Fake planting method: Generally, dig a fake planting trench with a width of 1-1.2 meters, a depth of 60-70 cm, and no limit on the length. Cut off damaged roots before planting to prevent mildew. Transplant in the following spring with a spacing of 60 × 40 cm between rows and plants. Irrigate after transplanting to ensure survival.

4. Afforestation

It is usually carried out before germination in spring. Before planting, the crown of the tree should be pruned, leaving all branches 30-60 cm long, and the rest should be cut off. The spacing between rows is 4-5 meters. According to the size of the root system, dig a suitable tree planting pit and separate the subsoil and topsoil. When filling the soil, the topsoil is at the bottom and the subsoil is at the top. Break up the soil clods. When the soil is filled to half of the pit, lift the seedlings slightly upward, step on them, and apply Apply an appropriate amount of fertilizer, then fill the pit with soil, firm it up, and pour enough water.

Question 2: How to plant a locust tree? Generally, it can be divided or sown, and some can be cut or grafted.

Generally speaking, the locust trees we often talk about include Sophora japonica, Sophora japonica, and Sophora japonica. Sophora japonica, Sophora japonica, etc.

The basic differences between Chinese Sophora japonica and Robinia Sophora japonica are:

1. Robinia Sophora japonica has stipule thorns, while Chinese Sophora japonica does not.

2. Robinia pseudoacacia blooms in May, and Sophora japonica blooms from July to August.

1. Sophora japonica:

The Sophora japonica tree belongs to the Sophora genus of the butterfly family. The Sophora japonica tree is also directly called the Sophora japonica tree. It is a deciduous tree with a round shape. Branchlets are green, with obvious lenticels, and winter bud scales are not visible. Odd pinnate leaves, alternate, with 7-17 leaflets, opposite, ovate to ovate-lanceolate, with thin margins. Terminal panicle, butterfly-shaped flowers, light yellow-green. The pods are constricted between the seeds into a rosary shape. They do not crack when ripe and are fleshy. They hang on the treetops and do not fall off for a long time. The flowering period is from June to August and the fruiting period is from October.

2. Black locust:

Black locust is also called black locust, white locust, and German locust. It is a deciduous tree of the Papilionaceae family, reaching a height of 25 meters; the bark is brown with longitudinal cracks. The branches have stipules, and the pinnate compound leaves have 7-25 leaflets, alternate, oval or ovate, 2-5.5 cm long, 1-2 cm wide, with a rounded or slightly concave apex and a small tip at the base. Round. The flowers are white with red markings on the calyx tube. The flowering and fruiting period is in May. Fruit matures from October to November.

3. Sophora japonica:

The general characteristics of Sophora japonica are the same as those of Sophora japonica, except that its branches and leaves are drooping.

4. Red Sophora japonica:

The general characteristics of Purple Sophora japonica and Robinia Sophora japonica are the same, except that the flowers are red.

5. Golden-leafed Robinia:

It is a broad-leaved deciduous tree of the genus Robiniaceae in the Papilionaceae family. It is more than 25 meters tall. The dry skin is deeply split longitudinally and odd-numbered pinnate compound leaves. There are 7-19 leaflets, oval, 2-5 cm long, entire edge, slightly concave apex with small spines. The leaves are golden yellow in spring, turn to yellow-green in summer, and turn to orange-yellow in autumn. The leaf color changes richly. , blooms in early summer, with white, fragrant flowers in pendulous racemes.

6. Robinia pseudoacacia:

It is a deciduous tree of the genus Robinia of the Papilionaceae family, up to 2-4 meters high. Its branches and pedicels are densely covered with red thorns, and its odd-numbered pinnate leaves are , 7-15 leaflets, nearly round or oblong, 2-5 cm long, raceme, with 3-7 flowers, corolla rose red or lavender, fruit 5-8 cm long, rarely developed, flowering period In July, the fruit matures from September to October.

7. Sophora japonica:

It is a deciduous tree of the genus Sophora genus of the family Butterfly family. The tree is 16 meters high. The bark is brown to gray-brown, smooth, and the leaves are alternate, 7- 11 leaflets form a pinnate compound leaf. The leaves are oval, ovate to oblong, 4-12 cm long, with a pointed apex and a slightly skewed base. The inflorescence is axillary, with red and fragrant flowers. The flowering period is May or July. The flowering period is May. It lasts 20 days, and the flowering period lasts about 40 days from July to August. It blooms continuously in spring, summer and autumn in the south. The corolla is butterfly-shaped, pink or purple, with a small number of small thorns. The fruit period is October.

8. Five-leaf Sophora japonica:

Also known as Butterfly Sophora japonica, it is a variant of Sophora genus in the butterfly family, Sophora genus, with 3-5 leaflets in clusters and often 3 terminal leaflets. Split, the lower part of the lateral leaflets often has large lobes, and the back of the leaf is hairy.

9. Sophora japonica:

Also known as Sophora japonica, it is a deciduous tree of the Sophora genus in the butterfly family. The crown is spherical or obovate, up to 25 meters high, with golden branches. Yellow, odd-pinnate compound leaves, leaflets opposite, entire margin, inflorescence in terminal panicle, yellow-white flowers, flowering period from June to September. zhidao.baidu/question/25630187?fr=qrl3

Name: Sophora japonica

Latin name: Sophura japonica

Alias: Sophora japonica

< p> Family: Fabaceae Genus: Sophora genus

It is native to northern China, from Liaoning in the north, to Guangdong and Taiwan in the south, from Shandong to Gansu in the east, and is cultivated in Sichuan and Yunnan.

Deciduous tree, 20 meters high, with a spherical crown. The bark is gray-black and split longitudinally. Branchlets are green, smooth, with obvious yellow-brown lenticels. Odd-numbered pinnate compound leaves, opposite leaflets, 7 to 17 leaves, oval or ovate, with pointed apex, rounded to broadly wedge-shaped base, ** and pubescent hair on the back, and entire margin. Blooms from June to August, with pale yellow flowers in panicles. The pods are fleshy, ripe in October, and do not fall off for a long time after ripening.

It likes light, is slightly shade-tolerant, cold-tolerant, and intolerant of shade and dampness. Resistant to drought and barrenness... >>

Question 3: What is the best season to sow and propagate Sophora japonica seeds

1. Selection of nursery land

Sophora japonica seedlings should be cultivated in loam or sandy loam with flat terrain, good drainage and irrigation conditions, fertile soil, and deep soil layers.

Sophora japonica

It can adapt to neutral, calcareous and slightly acidic soils. It can grow normally on mild saline-alkali soil (salt content is about 0.15%), but it will not grow well in drought, barren and low-lying water-filled nurseries. [2] < /p>

2. Seed treatment should be treated by soaking or sand hiding method before sowing.

(1) Seed soaking method: first soak the seeds in 80℃ water and stir continuously until the water temperature drops to 0. Keep the swollen seeds for 24 hours until the temperature is below 45°C. Take out the swollen seeds and repeat the above method 2 to 3 times to reach the swollen level. Cover the swollen seeds with wet cloth or straw curtains for 1.5 to 2 days to germinate. , about 20% of the seeds can be sown. [2]

(2) Sand storage method: Generally, the seeds are stored in the sand 10 to 15 days before sowing, and the seeds are soaked in water for 24 hours. , make the water content of the sand reach 60%, that is, hold it into a ball and it will fall apart when touched. Mix the seed sand evenly at a volume ratio of 1:3, put it into the pit dug in advance, and then cover it with plastic sheet during the sand storage period. , turn it over once a day and keep it moist. It can be sown when 50% of the seeds germinate [2]

3. Sowing

The sowing time is generally spring sowing, and Zhuozhou is usually sown in spring. It is suitable to sow seeds in early to mid-April. The seeding rate is 10~12kg per acre. The ridge sowing method can be 70~80cm, the width of the ridge is about 30cm, and the height is about 15cm. 20cm, sowing width 10cm, mulching 1.5~2cm can also be done, without ridges, row spacing 60~70cm, sowing width 5cm after sowing, so that the seeds can be closely combined with the soil, and can be covered with film if conditions permit. >

Question 4: When is the best season to plant the Sophora japonica tree? Transplanting the Sophora japonica tree is best when the sap has not yet flowed or has just flowed, usually in early February-3 Carry out in the first ten days of the month. When taking seedlings, try to leave as many roots as possible and avoid damaging the roots.

Planting of Sophora japonica trees

1. Cut the stems at the right time.

Every year after the growth stops in spring and before the second growing season (usually in early July), cut off the curved part of the top and select a vertical upward branch as the new trunk.

2. Reasonable pruning

The so-called reasonable pruning means to retain as many side branches as possible without affecting the growth of the main trunk. This is beneficial to the thickening of the trunk, accelerates the lignification process, and avoids bending of the trunk.

Specific operations:

(1) Horizontal branches and branches close to horizontal are generally not pruned, allowing them to be pruned naturally.

(2) It affects the main head. Growing competing branches should be cut off promptly.

(3) Control the growth of other side branches that do not compete for growth. When their thickness reaches 1/2 of the thickness of the trunk, they should be cut off in time. Prevent the trunk from being sharpened too much and increase the height of the trunk. If the wound is cut off too late, it will be detrimental to healing.

3. Cut and dry again

For 2-3a-old seedlings, when they start to grow in spring, if the seedlings do not have an obvious main head or have a main head but it is too skewed The stem should be cut again, and the cut should be made at the beginning of the deflection. In addition, apply a healing antiseptic film on the pruning opening to promote wound healing.

4. Other measures

Apply more phosphorus and potassium fertilizers during the seedling stage, and strengthen the spraying of new high-fat film on the leaves during the growing season, which will help strengthen photosynthesis, accelerate the lignification process, and prevent the trunk from growing. bending.

In short, if you want to cultivate qualified Sophora japonica seedlings, you must master three key points: ① Cut off the stems and change the heads in time. ② Avoid excessive pruning.

③Maintain reasonable density.

Question 5: Is it okay to plant a locust tree in front of the door? In real life, most people may plant a locust tree in their own yard. Some people think that having a locust tree in front of the door is auspicious, which means that money will flow from it. . Some people think that there is a locust tree in front of the door, which is bad luck. So is it bad or good? ? Everyone knows that trees have a relatively long lifespan, and a locust tree can live for more than 300 years. According to the ancient book "Zhou Li? Qiu Guan", there were three locust trees planted outside the palace of the Zhou Dynasty. When the three princes met with the emperor, they stood under the locust trees. Therefore, later generations compared the three locust trees to the three males, hoping that their children would be among the three males. Therefore, folk tradition believes that the locust tree is the tree god, and planting a locust tree in front of the door is a wish to make money. The ancient book "Hua Jing" says: "Planting a locust tree in front of a crowded garden means, firstly, enjoying the shade. Secondly, it hopes that the descendants will be wealthy. According to records in ancient books, planting a locust tree at home is a very good choice. From a Feng Shui perspective, it is not advisable to have a large locust tree in front of the house. Why? Because the large locust tree is planted in front of the home and blocks sunlight from shining into the house, resulting in a lack of yang energy and poor ventilation in the house. The aura is chaotic, so the home owner's fortune will decline. Especially in the autumn season, the locust tree is shady and likes sunlight, and there is a lack of yang energy in the house, which causes the house to become turbulent and make people panic. It is recommended to plant a locust tree. Plant it to the left or right of the front. Furthermore, it depends on the age and health of the tree. If the tree has grown for hundreds or thousands of years, it is best not to move it, because the locust tree is called a Feng Shui tree. , has a certain spiritual power, so be sure to ask a Feng Shui expert to investigate. If the tree appears to be withered or has withered, it is recommended that there be no dead trees in front of the door.

6. Where should Sophora japonica be planted? Sophora japonica prefers light but tolerates a little shade. It has deep and well-developed roots and is not strict with soil, even in acidic to calcareous and slightly saline-alkali soils, even with a salt content of 0.15. It can grow normally under conditions of about %. It is resistant to wind, drought, and barrenness, and is especially adaptable to adverse environmental conditions such as urban soil compaction. However, it has strong resistance to pollution such as sulfur dioxide and smoke. . It grows quickly when young, then grows at a medium speed, and has a long life. Old trees are prone to hollows, but latent buds have a long life, which is beneficial to crown renewal.

Therefore, locust trees are not suitable for planting in low-lying areas.

Question 7: When is the best season to plant Sophora japonica? Sowing: Spring, Cutting: October every year, Grafting: Around Qingming Festival.

Question 8: How to plant Sophora japonica. How long does it take to start blooming? How big is the trunk? Three years

Question 9: How to plant Sophora japonica? Sophora japonica cultivation techniques

Sowing and propagation

Because the seed coat has The fence layer with tightly bound cells has poor water permeability. Before sowing, soak the seeds in water with an initial temperature of 85-90 degrees for 24 hours, and then treat the remaining hard grains 1-2 times before sowing with a spacing of 20-25 cm and covering with soil. The thickness is 1.5-2 cm, the seeding rate per acre is 8-10 kilograms, and the seedlings are unearthed in 7-10 days. The seedlings are planted reasonably densely to prevent the trunk from bending. Generally, 6-8 seedlings are left per meter, and the annual seedlings are more than 1 meter high. The seedlings can be transplanted and established after cultivating them in concentrated nutrient pots in early spring. If the seedlings are cultivated to form a good stem shape, they can be cut in the early spring of the second year and the spacing between rows can be increased. The seedlings will be 3-4 meters tall in the current year and the trunks will be straight. Strong and smooth.

Propagation by cuttings

After the leaves fall in October, cut the strong new branches into small sections of about 15 cm, tie them into bundles and soak them in water for 30 hours. , let it absorb enough water. Then dilute the powerful rooting agent with water at a concentration ratio of 100 times, add clay to make a paste, apply it to the roots of the cuttings, and immediately cut the cuttings onto the sand bed of the greenhouse seedlings. Keep the temperature at about 30°C and the humidity at about 80%. When tender shoots appear on the roots, they should be transplanted to the greenhouse ground in time. The spacing between rows should be 15 × 25 cm. When the seedlings are about 10 cm tall, pour a small amount of water and spray foliar fertilizer to promote the growth of the seedlings. When the average outside temperature is 20°C, gradually remove the greenhouse film (do not remove the film at once to prevent the seedlings from being exposed to the sun), and then use a shade net to shade for one to two weeks to prevent the seedlings from dying.

Grafting propagation

Use two-year-old common as rootstock, and cut off the branches of Sophora japonica with 4 to 5 buds in the open field before the Qingming Festival for abdominal grafting propagation. It can also be propagated in a greenhouse. The rootstock seedlings are propagated by budding in June of that year, so that the finished seedlings can be grown that year. Specific method: first carry out low-temperature dormancy treatment on the seeds, that is, mix the seeds and sand (humidity 80%), place them in the shade, and carry out sand dormancy. The temperature should be around 0°C to avoid turning into ice lumps. In about fifty days, you can go to the hotbed to induce germination. When 40% of the small white buds appear, you can make border plantings in the greenhouse. In mid-June, when the base of the seedlings reaches 0.5 cm, they can be grafted. At this time, it is mainly bud grafting with woody double tongue docking. The method is: use a joint knife to make a downward diagonal cut at the base of the stock, and then cut 2.5 cm above it toward the incision, reaching a depth of 2 mm in the xylem to form a tongue-shaped groove. Then use the same operation method to cut tongue-shaped bud pieces of the same size from the scion and put them into the tongue-shaped groove (the rootstock and scion thickness must match, and the gap cannot be too large, so as not to cause the cortex to fail to match and reduce the survival rate), and tie it with plastic film. Tightly, and then leave 3 to 4 leaves from the grafting bud upwards, and cut off the excess to promote the return of nutrients and make the grafting buds heal and survive as soon as possible. characteristics of tree species.

The branching rate is low, there are no side branches in the middle and lower parts of the trunk, the trunk thickens slowly, and most of these trees have hard wood but the lignification process is slow, making the trunks of the seedlings thin and soft, because the upper part of the seedlings has high water content and dense leaves. During the second growth period, branches tend to sprout, resulting in top-heavy growth. After being exposed to wind, rain and sun, the seedlings will naturally bend. In addition, the insect bites the young tips, causing a large number of sprouting branches to form headless seedlings.

Question 10: How many types of locust trees are there and in what soil are they planted? There are two main types of locust trees: Chinese locust trees and foreign locust trees. Sophora japonica is the most common, and its variant is called Butterfly Sophora japonica, with leaves shaped like butterflies. There are two types of acacia: white-flowered acacia and purple-flowered acacia. The white-flowered acacia flowers are very fragrant, while the purple-flowered acacia flowers have no fragrance. There is another variant of the white-flowered acacia, called the curved-branched acacia, whose branches are naturally curved.