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Nursery: Sow from mid-September to mid-October. Before sowing, soaking in warm water for 12 hours, set the basket inside, place the leeward sunny place, wash with water once a day and often flip, when half of the split mouth can be sown. Drilling or broadcast sowing, 10 kg per mu. Keep the seedbed moist after sowing and top-dressing with irrigation.
Afforestation: planting afforestation, the use of fish scale pits, narrow terraces, horizontal steps, horizontal ditch and other land preparation. Spring, autumn and rain can be planted in three seasons, and afforestation is easier to survive in the rainy season. It is advisable to create a mixed forest, which can be mixed with eucalyptus wood, ingot maple, cedarwood, and skunk. It can also be mixed with Astragalus, Amorpha fruticosa or other plants.
Management: Every year after afforestation, 2-3 times of loose soil weeding is performed in order to promote growth.
note:
1. Land selection, site preparation and fertilization: Platycladus orientalis seedlings should be flat, well-drained, and suitable for fertile sandy loam soil or light loam soil, with irrigation conditions. It is not advisable to choose soils that are too viscous or low-lying and that are not to be selected at the windward entrance.
To cultivate seedlings, deep plowing should be done and basic fertilizer must be applied. Generally take the fall to the ground, the depth of 25 cm or so, spring shallow turn about 15 cm, combined with the autumn deep-turning land, per acre planted manure 2500-5000 kg, the manure into the soil, and then squatting leveling.
2. Seed germination before sowing: Before sowing, the seeds should be germinated quickly and neatly. Platycladus orientalis has more empty seeds. After the first water selection, the floating granules are removed. Then use 0.3%-0.5% copper sulfate solution soaking for 1 to 2 hours, or 0.5% potassium permanganate solution soaking for 2 hours, seed disinfection. Then, a seed germination process is performed. At present, there are three kinds of methods commonly used for the germination of Platycladus orientalis seeds.
(1) Mixed snow burial method: Select leeward, shaded, well-drained, and easy-to-manage places. When the snow does not melt after winter, mix the seeds with 3 times the snow and put them into the dumplings. The grasshoppers and 10 cm thick snow surround the dumplings, and the seeds of mixed snow are placed in the middle. Bundles of rice straw are wrapped around the rice dumplings to keep the snow in the dumplings from melting in early spring.
The snow has been removed until 3-5 days before sowing. After the snow is removed, the seeds are screened out to dry and scattered, and the debris can be removed. Can also be taken about one week before sowing, after the snow mixed with fine sand, sun, turn mixing, warming and moisturizing, until there is a 1/3 seed split mouth, sieve sand or mixed sand timely sowing.
(2) Mixed sand-emerging germination method: When the seeds are transferred late, it is too late to catch snow, or winter snow is not enough to snow, the mixed sand can be used for germination 15-20 days before sowing. The seeds that will be selected for disinfection will be soaked in warm water for 24 hours. Then remove the seed and mix it into the fine sand twice as much as the seed volume. Mix it evenly. The humidity of the sand is suitable for holding into a group without water. Place it in a wooden box and place it in a warm place indoors. The sand temperature is often kept at 12 - At 15°C, turn 2-3 times a day and spray warm water at any time to maintain proper temperature and humidity to promote seed germination. After most of the seeds have germinated, one-third of the seeds are cracked and ready for sowing.
(3) Warm water soaking and germination method: The disinfected seeds are soaked in warm water of 45 cC for 24 hours, combined with seed dressing, and the floating seeds floating on the float are removed. Then spread the seeds out on the leeward sunny side of the mat, often tipping over to dry, maintain a certain humidity, rinse with warm water 1-2 times a day. After 5 to 6 days, one third of the seeds will be cracked and sowing can be carried out.
3. Seeding: Platycladus orientalis is suitable for spring sowing, but the sowing time is not the same due to the differences in climate conditions. Platycladus orientalis is slow growing. In order to prolong the growth period of seedlings, it should be suitable for early sowing in accordance with local climatic conditions. For example, in mid- and late March in North China, from late March to early April in the northwest, and April in the northeast. It is good in the middle and late.
Autumn planting arborvitae notes
Seed-collecting: Select 20-30-year-old or more healthy trees to collect seeds. The seeds matured in the September-October period, and the seeding rate was about 10%. About 45,000 grains per kilogram.