How to plant cedar seeds?

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.