Sowing and seedling raising method of S. sand pine 20

Abiesholophylla is an evergreen tree in broad-leaved spruce-fir and Korean pine forest in Changbai Mountain forest area, a characteristic species of northern coniferous forest, and one of the important timber tree species in Northeast China. The trunk of the sand pine tree is straight and complete, the tree posture is beautiful, the ability to resist diseases and pests is strong, the growth is rapid, the wood fiber is abundant, and it is an excellent tree species for creating timber forests, pulp forests and scenic forests. The artificial sowing and seedling raising technology of P. spp. is summarized as follows, which provides experience for the development of high-quality P. sinensis seedlings.

1. The nursery land is selected near the afforestation land, with convenient transportation, sufficient labor, flat terrain, fertile sandy loam, loam or light clay loam, and has the conditions for irrigation and drainage. 2. Soil management: Soil preparation is carried out by combining ploughing and harrowing. Ploughing is carried out in November before the soil freezes, at a depth of 20-30 cm.

Rake was carried out in early April of the following year. The soil disinfectant is ferrous sulfate, the application rate is 6kg mu, and the phosphorus is used to repel underground pests, and the dosage is 2kg mu. Fertilization in the ploughing before the bottom fertilizer, mainly organic fertilizer, the amount of application is generally 6000 7000kg for bed type operation, the bed surface should be 15cm higher than the ground, the bed width, the width of the trail ditch 35cm, the length of the seedbed is 20 Seed treatment and sowing germination treatment using snow germination, in late December, the seeds are soaked in 14% plant ash solution for 1h and then washed with water to remove the oil of the seed coat of sand pine.

After the seeds and snow are thoroughly mixed in a ratio of 1:3, -42-buried in the seeds.

Hello, happy to answer your questions. Pine seed seedlings first select the right seeds, to ensure the quality of the seeds, before the use of lead first treatment, the seeds soaked in warm water, and wait until germination after the orange to take out. The sowing time is to choose the round trapped in March and April in the spring, keep the temperature above 15 degrees, and then spread the seeds evenly.

The germination rate of Korean pine seeds is not low, so many methods are very effective for the germination of Korean pine seeds. However, in order to facilitate the rotten ruler, we usually use the soaking seed germination method. One month before sowing, we soak the Korean pine seeds in warm water for 10 days, then remove them and dry them, and use them directly when sowing.

1. Planting time.

Pine trees are usually planted in March and April, but depending on the local climate, they can be earlier or later. The reason why spring was chosen is because the climate is suitable at this time, the growth rate of the plants is relatively fast, and it is conducive to rooting and germination after sowing. If it is selected in the high or low temperature season, it will often affect the future growth of the plant.

Second, seed selection and germination.

Pine seeds are usually collected from August to October, and after picking, they are dried and then stored in a dry place to prevent them from becoming moldy and deteriorating. Before preparing for sowing, the seeds need to be soaked in warm water at a temperature of about 40, and then stored in the sand to keep their humidity at about 60%, so that they can germinate quickly.

3. Level the land.

Planting pine trees must be carried out in a deep, fertile and loose place, the flatter the terrain, the better, and good drainage is very helpful for the growth of plants. In order to ensure its health, it is usually necessary to disinfect the soil, and at the same time, a little fertilizer is applied to the soil to provide nutrients for the high-disturbed bushes.

Fourth, sowing seedlings.

The pine seeds are buried in the soil, properly watered, usually after 25-30 days can be unearthed, and wait another 15 days for their shells to fall off, during which it is necessary to prevent the invasion of birds and beasts, so as not to destroy the seedlings. After the seedlings grow, they should be properly shaded, and when they grow up, they can be supplemented with a little fertilizer.

Hello, I am glad to serve you and give you the following answers: the pine pine seedling cycle is generally 3-4 months, including seed preparation, seed sowing, seedling management, seedling cultivation, seedling harvest and other steps. 1.

Seed preparation: First of all, we must prepare good seeds, the seeds are required to be fresh, free of diseases and pests, and the quality of the seeds will directly affect the quality of the seedling stage. 2.

Seed sowing: When sowing seeds, we should pay attention to the sowing depth, the sowing depth is generally 2-3 cm, and the sowing density should be appropriate to prevent the germination rate of seeds from being too low. 3.

Seedling management: Seedling management should pay attention to watering, fertilization, weeding, pest control, etc., to ensure the quality of seedlings. 4.

Seedling cultivation: Seedling cultivation should pay attention to controlling the temperature and humidity of the seedling stage, as well as appropriate fertilization to ensure the quality of the seedling stage. 5.

Seedling harvest: When harvesting at seedling stage, we should pay attention to the harvest time, as well as the harvesting method, and simplify the panicle to ensure the quality of the seedling stage. Personal Tips:

The seedling cycle of pine pine is strict, and every step should be paid attention to to ensure the quality of the seedling stage. In the process of seedling management and cultivation, attention should be paid to controlling temperature and humidity, as well as proper fertilization, so as to ensure the quality of seedlings.

Hello, I am happy to serve you and give you the following answers: The seedling cycle of pine pine is generally 3-4 months, and the specific time depends on the environmental conditions and planting techniques of the nursery. In general, the main steps of the pine seedling cycle are as follows:

1.Seed preparation: Choose high-quality pine nuts, wash them, and soak them in warm water to allow them to germinate.

2.Nursery preparation: Prepare the nursery, sow pine molds with molds, and keep the soil moist after sowing to promote germination.

3.Seedling management: At the seedling stage, fertilizer should be applied regularly to keep the soil moist, prevent drought in the nursery, and prevent pests such as pine insects.

4.End of seedling period: When the seedling period ends, the pine nuts in the nursery should be harvested in time for subsequent planting.

In the pine seedling cycle, if there is a problem, it is generally caused by poor environmental conditions or improper planting techniques. Workaround:1

Environmental conditions: It is necessary to maintain the temperature, humidity, light and other environmental conditions of the nursery to promote the germination and growth of pine nuts. 2.

Planting techniques: It is necessary to master the correct planting techniques, such as sowing, fertilizing, irrigation, etc., to ensure the quality of the nursery. 3.

Pest control: Pests should be controlled in time, such as pine insects, aphids, etc., to prevent the harm of pests to the nursery. Personal Tips:

1.It is necessary to choose high-quality pine nuts to ensure the quality of the nursery. Old age 2

It is necessary to master the correct planting techniques to ensure the quality of the nursery. 3.Pests should be controlled in a timely manner to prevent pests from harming nurseries.

4.It is necessary to maintain the temperature, humidity, light and other environmental conditions of the nursery to promote the germination and growth of pine nuts.

There are two kinds of Korean pine seedlings: fixed nursery and temporary nursery in mountainous areas, but a large number of seedlings are still fixed nurseries.

1. Nursery land selection:

Fixed nurseries should be selected on moist, fertile, well-drained, slightly acidic, sandy loam soils. The terrain is gentle, sheltered from wind outlets and has good irrigation conditions.

2. Land preparation: there are autumn and spring turning. Fixed nursery split culture autumn turning depth 18 24 cm, spring turning depth 10 15 cm. Spring turning is carried out simultaneously with 1 3% ferrous sulfate solution per kilogram per square meter for soil disinfection.

3. Fertilization: according to the fertility of the nursery land. It is best to apply organic matter fertilizer and manure, peat, soil manure, green manure, etc., such as leaving the bed for 1 2 years without transplanting the seedbed, about 10,000 kg of organic fertilizer can be applied per mu. Add another 15 kg of superphosphoric acid.

4. Bed: There are beds and ridges. Most of the existing fixed nurseries are mechanical beds.

The bed surface is required to be 1 meter wide and 10 15 cm high; Ridge cropping requires a width of 30 cm on the ridge surface, 60 cm wide at the bottom of the ridge, and 10 cm high. There is no limit to the length. Regardless of the bed and ridge cropping, it is better to use the north-south direction.

5. Seed germination:

Korean pine seed shells are thick, not easy to permeable to water and aeration, and contain germination inhibitors to germinate embryos, so germination must be carried out before sowing.

6. Sowing time and method:

In spring, when the temperature reaches 8 or more at 5 cm underground, it can be sown. The sowing rate is 200 250 kg per mu. Before sowing, the bed or ridge surface is carefully leveled, and the seeds are sown on the bed or ridge surface with a seeder or seeding roller, and then they are pressed so that the seeds are in close contact with the soil.

Then cover it with sand or sawdust twice as thick as the seed grains, and then suppress it once again. If sawdust is covered, water must be poured through.

7. Field management:

1) Irrigation: During the germination of seeds, the bed surface should be kept moist frequently, and less irrigation and multiple times should be taken to facilitate the germination of seeds.

2) Bird control and weeding loosening soil.

3) Top dressing: For 2 3-year-old seedlings, top dressing must be done in time.

8. Seedling overwintering management

Although Korean pine can tolerate low temperatures, it is afraid of drought. Therefore, overwintering is mainly to prevent the aboveground part of the seedlings from germinating in early spring, and the soil is not thawed and cannot be watered.

9. Seedling cellaring:

Cellaring seedlings can overcome the concentration of spring nursery operations and ensure the timely supply of seedlings during spring afforestation. Generally, the temperature in the cellar drops to 0 before the seedlings can be released. <>

Korean pine is an excellent timber forest and food forest tree species in Northeast China, the seed coat of Korean pine seeds is thick and hard, there is a layer of wax, it is not easy to permeable to water and breathability, the seed coat contains tannins, and other parts of the hail contain inhibitors such as abscisic acid, which affects the rapid germination of Korean pine seeds, so that Korean pine seeds are dormant for a long time, and the long-term dormancy of Korean pine seeds should be lifted, under natural conditions, after the seeds are mature, they must be buried in winter, summer and winter, and they can be sown in the spring of the third year. In recent years, due to the shortage of Korean pine seeds and the high market, there is no stock liquid of Korean pine seeds in the seed bank, and the traditional overwintering and burial method cannot be used to treat Korean pine seeds. In order to better cultivate Korean pine seedlings, since 2003, the Hebei Forestry Bureau of Heilongjiang Province has used the newly harvested Korean pine seeds for variable temperature germination treatment.

After using this method, the Korean pine seeds are sold in the closed soil 3-5 days after sowing, and all of them are produced in about 7 days, and the annual seedling emergence rate is more than 90. <>

Red pine seeds, also known as fruit pine nuts and sea pine nuts, Korean pine seeds are the seeds of wild Korean pine. Wild Korean pine is a national first-class endangered species, mainly distributed in the Changbai Mountain Range and the Xiaoxing'an Mountains forest area in northeast China. Wild Korean pine takes 50 years to grow before it begins to produce pine seeds, and the maturity period is two years.

The fruit bulb is large and oval-shaped, dark brown, and the ball is knotted, as big as croton, deliberately called red pine seed.

The seed shell of Korean pine is dense and thick, covered with wax, which is not easy to permeable to water and air, and contains tannin and other germination-inhibiting substances, which makes it difficult for the germination of the seed embryo. Therefore, the seeds should be germinated before sowing. The commonly used methods of pseudobud preparation are as follows:

Indoor natural accumulation method: in mid and late August, after soaking Korean pine seeds in water for 1 to 2 days, mix 2 times the wet sand to make the moisture content about 60%, pile 30 to 40 cm thick, and place it indoors. When the weather is cold, it is piled up to 60 cm thick, watered to freeze it, and turned it before the next year's spring sowing to make the temperature and humidity even.

Open-air overwintering and burial method: that is, in autumn, the seeds are soaked in cold water for 2 to 3 days, and then mixed with 2 to 3 times of wet sand, mixed and placed in the open cellar. The kiln site should be selected in a place with high and dry terrain and good drainage.

The cellar is up to meters deep and 2 meters wide. When the mixed sand seeds are 20 to 30 meters from the mouth of the cellar, a straw is erected every 2 to 3 meters to ventilate, and a layer of sand is covered with a 1-meter-high mound. This method promotes uniform germination, and the seedlings emerge early after sowing in the spring, and they are neat and strong.

Rapid germination method: that is, about 40 days before sowing, soak the seeds in warm water at 50 degrees Celsius, stir fully, let them cool naturally, soak for a week, and replace the water once a day. When the kernels turn milky white, remove the seeds and mix them with 2 to 3 times the wet sand, and put them in a leeward sunny place to dry.

Every night, the sand will be closed and piled up, covered with plastic film, and then spread and dried the next day. In order to speed up germination, it can also be heated indoors, so that the sand can be maintained at 20 to 25 degrees Celsius, turned several times a day, and the sedan can be sold to maintain a certain humidity. Seeds can be sown when one-third of the seed is cracked.

Seed treatment and germination can be appropriately added with rooting powder.

Sow seeds, choose white seeds and sow them.

After sowing and before the emergence of seedlings, use the herbicide of the forest Huier nursery to control the weed, 75-100 ml per mu.

After the emergence of seedlings, spray nail frost and mildew in a timely manner to prevent blight, cataplexy and root rot.

Strengthen management to prevent weeds and diseases.