How to plant cedar seeds? Sowing methods and Seedling raising techniques of Cedar

Cedar is one of the five most famous garden tree species in the world. it is the backbone tree species planted the most in urban landscaping in China, mainly using sowing and cutting methods to raise seedlings. In recent years, cedar seedlings are very popular, with a large seedling gap and high prices. Cultivating cedar seedlings has a high market prospect. Let's take a look at how to plant cedar seeds.

Cedar seedling bed treatment

Select the loose and fertile sandy soil nursery with convenient drainage and irrigation and turn it deep in early winter, which can not only improve the physical and chemical properties of the soil, but also kill underground pests and reduce the occurrence of seedling diseases in the following year. At the same time of ploughing, 250 kg of cake fertilizer and 50 kg of superphosphate are applied per mu, and the fertilizer and soil are raked evenly, so as to ensure that the seedlings have enough nutrition after sowing.

Cedar seed treatment

The seeds of cedar are generally about 6000-8000 seeds / kg, and there are more empty seeds, so it is necessary to select seeds and remove the empty seeds. The seeds should be soaked and germinated before sowing, and the best effect is to soak the seeds in cold water for 96 hours. They can also be soaked in warm water of 45-50 ℃ for 24 hours, sterilized with 0.1% potassium permanganate for 30 minutes, and then rinsed with clean water to dry and sow seeds. Do not sow seeds with wet.

Cedar seed sowing

The sowing time of cedar is generally carried out before the Spring Equinox, sooner rather than later, strip sowing is better, row spacing is 10-15 cm, plant spacing is 4-5 cm. The seed should be planted on the sowing ditch, be sure to put the big end of the seed upward, sowing 1520kg per mu, and cover it with yellow soil or charred mud ash 1cm thick after sowing. And cover it with a thin layer of straw and sprinkle water on it to keep the bed moist. It can germinate after about 3-5 days, and the seedlings emerge one after another in about half a month. The emergence time lasts for more than 1 month, and the general germination rate can reach 90%.

Seedling management of cedar

In order to prevent the newly unearthed cedar seedlings from being lost by rain, and to control the temperature in the greenhouse, ventilation should be carried out when the temperature in the greenhouse is kept at 15: 20 ℃. When the outside temperature is above 15 ℃, the film can be opened during the day and covered at night. When more than 70% of the seedlings emerge, remove the straw in batches, build a frame in time, and cover the sunshade net or Reed curtain for shading. There are not many diseases and insect pests in cedar, especially the fatal diseases and insect pests are more rare. The main purpose of preventing aphids in spring is to prevent aphids, which is very common in the Yangtze River valley and eats the tender head of cedar, resulting in the loss of top growth advantage of cedar trunk. It is very simple to prevent this kind of insect, and it can be solved by spraying phosphorus-containing insecticides in time when there are signs of insect pests.

Cedar seeds are stored. The method of sowing and breeding cedar is one of the world famous ornamental trees in the courtyard. It has high ornamental value because of its tower-shaped crown, spreading branches, well-proportioned leaves and gorgeous cones. Cedar also has strong noise reduction, dustproof and germicidal ability. The culture method of cedar: Cedar can be cultivated by sowing, cutting, grafting and other methods. Black pine is often used as rootstock in grafting method, and it is grafted by buried soil split grafting in spring. The breeding rate of this method is low, and the phenomenon of interface incompatibility is easy to occur. In cuttage culture, the age of scion mother is an important factor affecting the survival rate, which is generally higher in the young village of 3-5 years. It is more ideal to use dry seedlings as cuttings. Generally, cuttings are carried out in spring. Before cutting, the cuttings are dipped with 500 × 10-6 naphthalene acetic acid and watered in time after cutting. generally, healing tissue can be formed in about 40 days and take root after 3 months. Before rooting, we should pay attention to the matrix and environmental moisturizing, in order to reduce transpiration and improve the survival rate. It is easy to obtain a large number of seedlings in cedar seed culture. Because most cedars are dioecious. Male flowers bloom in advance, so it is difficult to pollinate naturally. Artificial pollination is a prerequisite for the development of cedar seed breeding. Seed collection and seed treatment: the cedar cones mature in October of the following year and can be collected when the cones change from cyan to brown. Put the cones in a dry and ventilated place, spread them out, remove the seeds, and put them into a cloth bag to cool and dry. Before budding, use 3% potassium permanganate solution to disinfect the seed noodles. Cool and dry, then mix with 2-3 times wet sand to warm to sprout. Keep it moist during budding and turn it 1-2 times a day. When the seeds germinate and the cracks are exposed, the seeds can be sown separately, and the ungerminated seeds can continue to accelerate germination, separate examination and sowing. Soil disinfection: quenching disease is the enemy of cedar seed breeding, so soil disinfection should be done well before sowing. The commonly used disinfectants are ferrous sulfate (black alum), Shiduqing, dimethazone and so on. The concentration of disinfectant solution can be slightly increased according to the instructions, and the soil covered with plastic film can be fumigated to give full play to the efficacy. Sowing and raising seedlings in the field can be sterilized with ferrous sulfate, and the dosage of each border surface (1cm) is 250-400g. It is rolled into fine powder, then evenly sprinkled into the soil, and its efficacy is longer than that of diluent spray. Sowing seedlings and seedling management: after soil disinfection, the seedling bed was first watered to produce moisture, and then sowed after 3 days. The thickness of the covered soil is about 1-2 times of the short diameter of the seed, and generally 5-10 can sprout. After the seedlings come out (about 15 days), attention should be paid to the prevention of quenching disease. Carbendazim or methyl thiophanate can be used to spray the surface of the soil, once every 15 days, three times in a row, stop spraying after the Lignification of the seedlings, and then apply 2-3 times with compound fertilizer or urea solution (1% Mutual 3%). Pay attention to drainage in summer and guard against cold in winter. In the seedling stage, it is necessary to use artificial pulling grass, or shallow ditch hoe to protect soil moisture, to avoid damage to the root system, and should not be watered and fertilized after the beginning of autumn. Transplanting and large seedling cultivation: the sowing seedlings should be transplanted in the spring of the following year, those raised in the nutrition bowl should be transplanted off the bowl, and those raised in the field could be transplanted before germination in late April. Base fertilizer should be applied to the transplanting site, and it is better to use fully mature ring fertilizer, and attention should be paid to the prevention and control of underground pests in combination with fertilization. . Methods of raising cedar seeds 1. Cedar (Cedrus deodara)

Pinaceae, cedar.

The trunk of the cedar is straight and the lateral branches are spreading. The posture is majestic and graceful. It is one of the world's famous garden ornamental tree species, together with Pinus elliottii, Japanese pine, Sequoia sempervirens and Sequoia sempervirens. It is most suitable to be planted alone in the center of the flower bed or in clusters on the edge of the lawn and on both sides of the building; it is also magnificent and magnificent in the trunk road and square.

(1) sowing and breeding

Apply 7.5 g-11.2 g ferrous sulfate before sowing: or 70% dimethazone powder 0. 5 kg for soil disinfection, 5% phoxim granule 1.5 ^-2. 5 kg to eliminate underground pests. The seedlings were raised in high bed in storage season.

The seeds were soaked for 1-2 days before sowing, the sowing rate was 7.5 g/mr, on demand, and the plant-row spacing was 10-15 cm. The thickness of search soil is 1-1.5 cm. After sowing, the seedling bed was covered with straw or wing film, and the seedlings were evacuated after being unearthed. A shed should be set up for shading in the seedling stage, and the seedlings can be raised in full light in the later stage. To prevent seedling shattering and leaf blight. 0.5% can be sprayed after emergence.

Bordeaux liquid or spray 700 times of dexamethasone at 70 latitudes.

(2) multiplication of cuttings

One-year-old stout branches from young mother trees were selected as scions. This is the key to cuttage survival. The younger the mother tree is. The higher the survival rate. The contact length is 15 cm. Cut the base smoothly and soak the cuttings base 5 S with 500 Chuan / I 'Cai acetic acid aqueous solution. And then cuttings. Spring planting is the main method. Put in the back and take the maid for shade. After the Beginning of Autumn, you can remove the shadow support.