Propagation techniques of Robinia pseudoacacia

Robinia pseudoacacia, also known as Robinia pseudoacacia, is relatively drought-tolerant and can grow normally on arid sunny slopes and sandy land in North and Northwest China. It is a good tree species for timber, soil and water conservation, wind prevention and sand fixation and "four sides" greening in North and Northwest China. Robinia pseudoacacia is a mycorrhizal symbiotic tree species, which can fix nitrogen to improve soil, so it can grow normally in barren soil, but it is better to have deep, fertile and well-drained soil, which is resistant to light saline-alkali soil. Strong sprouting ability and root tillering ability. Whether such a beautiful tree can be planted, the market prospect is still good. Let's take a look at the breeding techniques of Robinia pseudoacacia.

1. Raising seedlings in fine root section

1. Preparation of budding bed. Choose the place where the terrain is high and dry, leeward to the sun, straighten out the flat bed, water the soil moisture, and rake fine and flat. You can also choose to sprout with a sand bed in the greenhouse.

2. Sowing roots. The fine roots with a thickness of more than 0.3 cm are cut into root segments 3-5 cm long, and dipped in the roots with Gymboree root seedlings. In the trench on the surface, sow the root section into the ditch, and the thickness of the covering soil should not reveal the root section, sowing 300 root segments per square meter. Then spray enough water, when spraying water, you should avoid flushing the root out of the soil surface and covering the plastic film, so as to increase the ground temperature and preserve soil moisture.

3. Seedling transplanting. When the seedlings on the flat border grow to 5-10 cm high, begin to dry the seedlings, and three days later begin to transplant the seedlings to the nursery ground. The soil preparation method of nursery land is the same as that of thick root section.

2. Raising seedlings in thick root section

1. Sprouting by planting. The thick root with a thickness of more than 0.5 cm is cut into a root segment 10 cm long. when cutting the root, it is necessary to distinguish the size of the root segment (the upper and lower ends) and cut out the marks. Dig the budding pool, 1.2 meters wide, 15 centimeters deep, and the length depends on the number of roots. The root segment was placed in the pond with a tilt of 45 °and dipped in the root with Gymboree root seedling, and one layer of root was sprinkled with a layer of sandy soil. After discharging the roots, pour 40 jin of water per meter long, and then cover the surface with 2mi 3cm thick sandy soil. An arch shed is built on the budding pool to increase the temperature and preserve soil moisture. About 10 days later, when the buds grow to the size of mung beans, cuttings begin. Pay attention to keep the ground temperature in the greenhouse less than 30 ℃ and the air temperature less than 35 ℃ during budding.

2. Preparation of nursery ground. Select flat land, after deep turning, applying organic fertilizer and raking fine leveling, make a ridge with a spacing of 60 cm, which is 10 cm high and 20 cm wide. Pour enough water to moist the soil for transplanting.

3. Cutting. Take out the root segment that promotes the bud and cut it on the back of the nursery. Dig a 10 cm deep seam under the spade and put the root segment into it, so that the upper end of the root segment is level with the monopoly back, and the ground is stitched together and firmly. Combined with watering, the application of Gymboree root seedlings can improve the survival rate of seedlings, slow seedlings quickly, root quickly, and overcome the obstacles of ground temperature (low temperature or high temperature).

3. Seedling density

The row spacing of seedling plants can be 30 × 60 cm to 30 × 80 cm, 3000-3500 plants per mu, and the densest plant is not more than 4000 plants. It varies according to seedling raising technology, nursery fertility and fine management.

IV. Seed breeding

1. Seed treatment. There are different numbers of hard seeds in Robinia pseudoacacia seeds, which should be treated by gradually warming and soaking seeds many times, that is, soaking the seeds in 60 ℃ water at first, cooling naturally, and then taking out the swollen seeds after 24 hours; for the unswollen seeds, soaking the seeds in 80 ℃ water, then cooling, covering the swollen seeds with wet sacks or straw mats, stuffing and accelerating germination, and then sowing after 1.5-2 days.

2. Sowing seeds. The sowing time is from late March to early April. The application of organic fertilizer per mu, such as circle fertilizer 3000-5000 kg, strip sowing, row spacing 40 cm, covering soil 1-1.5cm, sowing rate about 4 kg per mu.

3. Nursery stock management. It is appropriate to plant seedlings in the morning and set them late. Generally divided into 2-3 times between seedlings, when the seedling height of 15 cm, plant spacing of 10-12 cm, about 10,000 plants per mu. The root system should be well ventilated and should not be watered more. It should be based on the principle of no drought and no watering. A small amount of phosphate fertilizer can be applied in the fast-growing period.

4. Pest control. The main diseases and insect pests of Robinia pseudoacacia are root maggots and blight. When root maggots occur, the activity of trichlorfon can be inhibited by watering it in shallow trenches near the seedling ridges. In order to prevent the occurrence of blight, irrigation should be controlled and soil loosening should be strengthened.

Under the condition of normal growth, one-year-old seedlings with an average ground diameter of 1.2 cm can be out of the nursery for afforestation.

After reading the above, do you have more mature technology to breed Robinia pseudoacacia? And can be made into locust honey! It is also a kind of plant with great economic benefits. Huinong School also has more related agricultural technology knowledge, continue to pay attention to Huinong School, and answer questions for you in the planting process.

Propagation technique of Robinia pseudoacacia

1. Raising seedlings in fine root section

1. Preparation of budding bed. Choose the place where the terrain is high and dry, leeward to the sun, straighten out the flat bed, water the soil moisture, and rake fine and flat. You can also choose to sprout with a sand bed in the greenhouse.

2. Sowing roots. The fine roots with a thickness of more than 0.3 cm are cut into root segments 3-5 cm long, and dipped in the roots with Gymboree root seedlings. In the trench on the surface, sow the root section into the ditch, and the thickness of the covering soil should not reveal the root section, sowing 300 root segments per square meter. Then spray enough water, when spraying water, you should avoid flushing the root out of the soil surface and covering the plastic film, so as to increase the ground temperature and preserve soil moisture.

3. Seedling transplanting. When the seedlings on the flat border grow to 5-10 cm high, begin to dry the seedlings, and three days later begin to transplant the seedlings to the nursery ground. The soil preparation method of nursery land is the same as that of thick root section.

2. Raising seedlings in thick root section

1. Sprouting by planting. The thick root with a thickness of more than 0.5 cm is cut into a root segment 10 cm long. when cutting the root, it is necessary to distinguish the size of the root segment (the upper and lower ends) and cut out the marks. Dig the budding pool, 1.2 meters wide, 15 centimeters deep, and the length depends on the number of roots. The root segment was placed in the pond with a tilt of 45 °and dipped in the root with Gymboree root seedling, and one layer of root was sprinkled with a layer of sandy soil. After discharging the roots, pour 40 jin of water per meter long, and then cover the surface with 2mi 3cm thick sandy soil. An arch shed is built on the budding pool to increase the temperature and preserve soil moisture. About 10 days later, when the buds grow to the size of mung beans, cuttings begin. Pay attention to keep the ground temperature in the greenhouse less than 30 ℃ and the air temperature less than 35 ℃ during budding.

2. Preparation of nursery ground. Select flat land, after deep turning, applying organic fertilizer and raking fine leveling, make a ridge with a spacing of 60 cm, which is 10 cm high and 20 cm wide. Pour enough water to moist the soil for transplanting.

3. Cutting. Take out the root segment that promotes the bud and cut it on the back of the nursery. Dig a 10 cm deep seam under the spade and put the root segment into it, so that the upper end of the root segment is level with the monopoly back, and the ground is stitched together and firmly. Combined with watering, the application of Gymboree root seedlings can improve the survival rate of seedlings, slow seedlings quickly, root quickly, and overcome the obstacles of ground temperature (low temperature or high temperature).

3. The row spacing of seedling density can be 30 × 60 cm to 30 × 80 cm, 3000-3500 plants per mu, and the densest plant density is not more than 4000 plants. It varies according to seedling raising technology, nursery fertility and fine management.

IV. Seed breeding

1. Seed treatment. There are different numbers of hard seeds in Robinia pseudoacacia seeds, which should be treated by gradually warming and soaking seeds many times, that is, soaking the seeds in 60 ℃ water at first, cooling naturally, and then taking out the swollen seeds after 24 hours; for the unswollen seeds, soaking the seeds in 80 ℃ water, then cooling, covering the swollen seeds with wet sacks or straw mats, stuffing and accelerating germination, and then sowing after 1.5-2 days.

2. Sowing seeds. The sowing time is from late March to early April. The application of organic fertilizer per mu, such as circle fertilizer 3000-5000 kg, strip sowing, row spacing 40 cm, covering soil 1-1.5cm, sowing rate about 4 kg per mu.

3. Nursery stock management. It is appropriate to plant seedlings in the morning and set them late. Generally divided into 2-3 times between seedlings, when the seedling height of 15 cm, plant spacing of 10-12 cm, about 10,000 plants per mu. The root system should be well ventilated and should not be watered more. It should be based on the principle of no drought and no watering. A small amount of phosphate fertilizer can be applied in the fast-growing period.

4. Pest control. The main diseases and insect pests of Robinia pseudoacacia are root maggots and blight. When root maggots occur, the activity of trichlorfon can be inhibited by watering it in shallow trenches near the seedling ridges. In order to prevent the occurrence of blight, irrigation should be controlled and soil loosening should be strengthened.

Under the condition of normal growth, one-year-old seedlings with an average ground diameter of 1.2 cm can be out of the nursery for afforestation.

Reproduction points of Robinia pseudoacacia

Robinia pseudoacacia, commonly known as Robinia pseudoacacia, is a deciduous tree, which is widely distributed in China, especially in the Huang-Huai River Basin. The economic value of Robinia pseudoacacia is very high, not only can be ornamental, but also edible, the nutritional value of its nectar is also very high. So how should Robinia pseudoacacia reproduce?

Black locust

The cultivation techniques of artificial Robinia pseudoacacia can be divided into seedling stage and breeding stage. First of all, the seeds of Robinia pseudoacacia need to be treated in the seedling stage. From July to September every year, the seeds of Robinia pseudoacacia are relatively mature, and the seed pods gradually change from green to reddish brown. In order to ensure the integrity of the seeds, it is most appropriate to pick at this time. After a large area is spread out and dried, the seed coat begins to crack. The brittle outer skin of the seed is removed by manual and mechanical equipment, and other impurities are removed after seed washing to get the cultivated species of Robinia pseudoacacia. In order to get a fast and neat seedling emergence effect, the cultivated species need to be soaked in ① hot water repeatedly, when the breeding is relatively hard, soak repeatedly with hot water of 80 degrees Celsius, after it expands, put Cuiya in a humid environment. ② soaked the seeds in sulfuric acid for 30 minutes, washed them and soaked them in water for 12 hours, and then soaked them in water for 12 hours; ③ buried the fine sand and seeds for about 2 months in a humid environment of about 10 degrees Celsius. Secondly, it is necessary to sow Cuiya's seeds, and the sowing time is usually in spring. When raising seedlings through the seedling bed, the sowing amount is 22.5 ~ 37.5 kg/hm2 in bed sowing and 45 ~ 60 kg/hm2 in ridge sowing. Sufficient bottom water should be irrigated before sowing, and the thickness of soil cover is about 0.6 ~ 0.8 cm. Thirdly, the management during the seedling period is particularly important, because the seed is unearthed for a short time, so it is necessary to ensure that the soil and water is moist during the seedling period to prevent the emergence of similar hardening phenomenon on the ground, but it is also necessary to irrigate reasonably and not to soak the seedlings. After about 4 weeks, a pest control, soil loosening and weeding operation can be carried out, during which the weak leaves in the seedlings can be removed to ensure the photosynthesis during their growth. After that, when the seedlings are close to 1 meter or so, the seedlings can be fixed, and then fertilized before July. Finally, during the growth of Robinia pseudoacacia, fertilization, irrigation, weeding and other operations were gradually reduced to ensure its natural growth.

The breeding of Robinia pseudoacacia is no longer irrigated after August to enhance Lignification and improve the ability of anti-draining and overwintering. The seedlings of Robinia pseudoacacia can be selected in the current year, but in order to keep the roots of the seedlings in the range of 15-20 CM, they can be planted in spring. In order to improve the survival rate, it is necessary to carry out chemical treatment on the roots of the seedlings. According to the previous data, the survival rate of the seedlings soaked in naphthalene acetic acid for more than 12 hours can reach more than 80%, but it should be noted that each seedling needs to have a certain distance, and the distance of 45CM is relatively moderate. The treatment can cultivate Robinia pseudoacacia forest. In addition, there are some methods, such as asexual reproduction, grafting seedling, root planting and so on.

As the surviving Robinia pseudoacacia has strong adaptability, there are no strict requirements for soil cultivation and afforestation methods. Once the young forest is formed, as long as the young forest is regularly fertilized, weeded and insecticidal, the Robinia pseudoacacia forest can flourish, but it should be noted that the growth peak of Robinia pseudoacacia is in July, so fertilization is most appropriate in June. In addition, the seedlings are easy to drain, so the August harvest should strictly control the water, enhance Lignification and reduce the damage caused by draining.