What are the seedling propagation methods of cedar?

With the characteristics of fast growth and strong adaptability, cedar is one of the main ornamental tree species in streets, parks, factories, mines and courtyards. Cedar can be sown and raised seedlings, but also can be cuttage seedlings. Below, the editor of Tuliu.com will bring you the seedling breeding and breeding methods of cedar.

I. Seedling raising

Seed seedling, strong living ability of seedlings, strong roots, fast growth, good tree shape, but it is necessary to master seedling raising skills.

1. High bed

Cedar is a positive tree species, like dry and afraid of wet. The seedling bed is generally 30-40 cm high and 100 cm wide. The country should have good drainage, stop the rain and dry the nursery, and avoid stagnant water.

2. Early sowing

More than 3000 cedar seeds per 500g, thin shell, quick water loss, long storage will reduce the germination rate, generally self-sowing in March is better, if can not sow in time, must be stored in wet sand.

3. Shallow sowing

Cedar is a seed unearthed from cotyledons. Hypocotyl pushes the seed shell out of the ground together with cotyledons when it emerges. If the seed is sown too deep, it will suffocate and mildew. When sowing, we should pay attention to the position of the seed in the soil, and put the bud mouth down, which is beneficial to the radicle into the soil and Hypocotyl elongation, and push the seed shell and cotyledons out of the ground smoothly. Such as seeds placed horizontally or upside down. It is difficult to unearth the seeds, which will reduce the emergence rate. Sowing row spacing 10-15 cm, grain spacing 5-6 cm, covering soil 0.5-1.0 cm after sowing, then covered with a thin layer of grass, and then wet the seedbed with water.

4. Diligence management

The grass should be uncovered in time when 70%-80% of the seedlings emerge. First, pay attention to the weather. On sunny days, the grass should be uncovered after 6 p.m. and cloudy days in the morning. Second, be careful to prevent damage and uprooting seedlings. Sift the fine soil before uncovering the grass, and use the fine soil to bury the roots and protect the seedlings. During the growing period, shallow hoes are frequently used to loosen the soil and remove weeds. In the early stage, Bordeaux liquid was sprayed every other half month to prevent root rot. Pour thin dung water in summer to protect seedlings early, and a shed should be set up for shade for a long time. Fertilization should be applied frequently and thinly, and generally do not topdressing in September to prevent the vigorous growth of autumn shoots and frost damage in winter. Fine tube, seedling height 20-30 cm, with 3-4 branches.

Second, the method of branch cutting propagation and seedling breeding.

Cedar due to different flowering period, poor pollination, lack of seeds. Due to the difference of climatic conditions, cedar trees planted in the north do not blossom and bear seeds, so branch cutting propagation can be used to solve the problem of shortage of seedlings.

1. Land selection and preparation

Choose slightly acidic sandy loam, good drainage and ventilation, short light, cool climate, high air humidity nursery (near the shade of trees along the river). Before cutting, it is necessary to carefully prepare the soil, apply sufficient base fertilizer, and then make a ridge with a width of 90 centimeters, which requires that the ridge surface is flat and the soil is fine.

2. Timely mining and insertion

The sturdy strips developed in the middle of the crown of 3 ~ 5-year-old sunny trees were collected. the length of each cuttage was 10-13 cm. The cuttings should be inserted before 9 o'clock in the morning. The best cutting time was in the middle of March. Before cutting, the cuttings were soaked in tea acetic acid 500ppm for 3 seconds.

All right, the above is the cedar breeding and propagation method brought by the editor of Tuliu.com. I hope you like it. So I'll see you next time.